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000
FXUS66 KPDT 040520 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1020 PM PDT MON AUG 3 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...SHORT WAVE SEEN ON WATER VAPOR IMAGERY GENERATED
SHOWERS AND SCATTERED THUNDERSTORMS OVER CENTRAL OREGON THIS
AFTERNOON INTO THE EVENING. RADAR TRENDS INDICATE ACTIVITY IS
DIMINISHING AND WILL ALSO BE MOVING OUT OF THE FORECAST AREA OVER
THE NEXT 2 HOURS. OTHERWISE EXPECT PARTLY TO MOSTLY CLOUDY SKIES
FOR THE REMAINDER OF THE EVENING AND OVERNIGHT. UPPER LOW MOVING
INTO SOUTHERN BC WITH A WESTERLY FLOW ACROSS THE REGION TUESDAY
AND WEDNESDAY. SHOULD HAVE MOSTLY SUNNY SKIES WITH HIGHS IN THE
80S TO LOWER 90S. BREEZY WEST WINDS IN SOME LOCATIONS. 94

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS. SKIES WILL SLOWLY CLEAR 8-12Z. SMOKE FROM A WILDFIRE OVER
THE BLUE MOUNTAINS MAY INVADE INTO THE KALW AREA OVERNIGHT...DUE TO
DRAINAGE SOUTHEAST WINDS UNDER THE INVERSION. WINDS WILL PICK UP AGAIN
TOMORROW AFTERNOON. 76

&&

.PREV DISCUSSION... /ISSUED 340 PM PDT MON AUG 3 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...REMNANTS OF MOISTURE MOVING
ACROSS THE REGION WILL CONTINUE TO BRING A THREAT OF LIGHT SHOWERS
AND OR THUNDERSTORMS TO CENTRAL AND NORTHEAST OREGON THIS EVENING
AND THE TAPPER OFF TO JUST A FEW SHOWERS OVER THE EASTERN MOUNTAINS
OVERNIGHT. THE UPPER LEVEL LOW ALONG THE CANADIAN COAST WILL BEGIN TO
DOMINATE THE WEATHER PATTERN FOR THE FORECAST AREA ON TUESDAY AS WE
TRANSITION TO A MORE WESTERLY FLOW. THIS WILL SHIFT THE MOISTURE
EAST AND SOUTH LEAVING JUST A SLIGHT CHANCE OF SHOWERS AND OR
THUNDERSTORMS SOUTH OF A LINE FROM LA PINE TO ENTERPRISE TUESDAY
AFTERNOON AND EVENING. THE LOW WILL SETTLE OVER SOUTHERN BRITISH
COLUMBIA ON WEDNESDAY AND THEN SHIFT EAST INTO ALBERTA ON THURSDAY.
THESE ARE LIKELY TO BE THE COOLEST DAYS THIS WEEK. WESTERLY FLOW
OVER THE FORECAST AREA DURING THIS TIME FAVORS A DRY FORECAST BUT
COULD SEE SOME SHOWERS ALONG THE WASHINGTON CASCADE CREST ON
WEDNESDAY. EXPECT SOME BREEZY WESTERLY WINDS THROUGH WEDNESDAY WHICH
WILL BE A FIRE WEATHER CONCERN AND ADDRESSED IN THAT SECTION.

LONG TERM...THURSDAY NIGHT THROUGH SUNDAY NIGHT...WESTERLY FLOW
THURSDAY WILL SHIFT TO THE SOUTHWEST ON FRIDAY EVENING.  EXPECT
CONDITIONS TO BE MOSTLY DRY THURSDAY NIGHT...WITH INCREASING CHANCES
OF PRECIPITATION BY FRIDAY EVENING...MAINLY OVER THE CENTRAL OREGON
AREA.  DISTURBANCE TO THE SOUTH WILL INCREASE MOISTURE OVER THE
CENTRAL AND NORTHEAST OREGON AREAS ON FRIDAY NIGHT INTO SATURDAY.
MODELS HAVE DIFFERENT SOLUTIONS AFTER THIS TIME PERIOD...WITH
ANOTHER LOW PRESSURE SYSTEM MOVING IN FROM THE GULF OF ALASKA.  GFS
MODEL IS KEEPING MOST OF THE PRECIPITATION TO THE CENTRAL AND
NORTHEAST OREGON...WHILE THE ECMWF CONTINUES THE TROUGH OF LOW
PRESSURE FURTHER SOUTH OFF THE COAST OF OREGON...PROVIDING MORE
WIDESPREAD MOISTURE TO THE AREA.  OVERALL HAVE GONE WITH SLIGHT
CHANCE TO CHANCE SHOWERS AND THUNDERSTORMS THROUGH THE END OF THE
WEEKEND.  TEMPERATURES SHOULD BE IN THE UPPER 80S TO LOWER 90S FOR
THE TIME PERIOD. WEBER

FIRE WEATHER...RED FLAG WARNINGS ARE IN EFFECT FOR THE LOWER
COLUMBIA BASIN AND AREAS NEAR THE EASTERN COLUMBIA RIVER GORGE
THROUGH TUESDAY EVENING. WINDS HAVE INCREASED THIS AFTERNOON
COMPARABLE TO THE FORECAST...BUT RH`S ARE HIGHER THAN WE PREVIOUSLY
ANTICIPATED DUE TO OVERCAST MID LEVEL CLOUDS KEEPING COOLER
TEMPERATURES ACROSS THE REGION. THERE SHOULD BE SOME CLEARING OVER
THE NEXT COUPLE OF HOURS WHICH COULD CAUSE A SIGNIFICANT DROP IN RH
VALUES. TUESDAY WILL BE BREEZY TO WINDY WITH LOW RH`S IN THE WARNING
AREAS.  THE WARNING MAY NEED TO BE EXTENDED INTO WEDNESDAY...AS
CONDITIONS WILL BE SIMILAR. THE DECISION ON WHETHER OR NOT TO EXTEND
THE WARNING WILL BE MADE TOMORROW. AS FAR AS THE THUNDERSTORM
THREAT...THE LIGHTNING ACTIVITY SHOULD BE MINIMAL THIS EVENING AND
ON TUESDAY AND MAINLY FROM THE OCHOCO MOUNTAINS SOUTHWARD.  WISTER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  62  90  57  85 /  10  10   0   0
ALW  66  92  63  86 /  10  10   0  10
PSC  62  94  59  90 /  10   0   0   0
YKM  59  88  56  84 /  10   0   0   0
HRI  62  93  58  88 /  10   0   0   0
ELN  62  87  57  83 /  10   0   0   0
RDM  50  87  46  82 /  20  10  10   0
LGD  55  88  51  82 /  10  10  10  10
GCD  56  91  53  86 /  20  10  10  10
DLS  65  88  60  85 /  10   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR ORZ611-639>641.

WA...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

94





000
FXUS66 KPDT 040520 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1020 PM PDT MON AUG 3 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...SHORT WAVE SEEN ON WATER VAPOR IMAGERY GENERATED
SHOWERS AND SCATTERED THUNDERSTORMS OVER CENTRAL OREGON THIS
AFTERNOON INTO THE EVENING. RADAR TRENDS INDICATE ACTIVITY IS
DIMINISHING AND WILL ALSO BE MOVING OUT OF THE FORECAST AREA OVER
THE NEXT 2 HOURS. OTHERWISE EXPECT PARTLY TO MOSTLY CLOUDY SKIES
FOR THE REMAINDER OF THE EVENING AND OVERNIGHT. UPPER LOW MOVING
INTO SOUTHERN BC WITH A WESTERLY FLOW ACROSS THE REGION TUESDAY
AND WEDNESDAY. SHOULD HAVE MOSTLY SUNNY SKIES WITH HIGHS IN THE
80S TO LOWER 90S. BREEZY WEST WINDS IN SOME LOCATIONS. 94

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS. SKIES WILL SLOWLY CLEAR 8-12Z. SMOKE FROM A WILDFIRE OVER
THE BLUE MOUNTAINS MAY INVADE INTO THE KALW AREA OVERNIGHT...DUE TO
DRAINAGE SOUTHEAST WINDS UNDER THE INVERSION. WINDS WILL PICK UP AGAIN
TOMORROW AFTERNOON. 76

&&

.PREV DISCUSSION... /ISSUED 340 PM PDT MON AUG 3 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...REMNANTS OF MOISTURE MOVING
ACROSS THE REGION WILL CONTINUE TO BRING A THREAT OF LIGHT SHOWERS
AND OR THUNDERSTORMS TO CENTRAL AND NORTHEAST OREGON THIS EVENING
AND THE TAPPER OFF TO JUST A FEW SHOWERS OVER THE EASTERN MOUNTAINS
OVERNIGHT. THE UPPER LEVEL LOW ALONG THE CANADIAN COAST WILL BEGIN TO
DOMINATE THE WEATHER PATTERN FOR THE FORECAST AREA ON TUESDAY AS WE
TRANSITION TO A MORE WESTERLY FLOW. THIS WILL SHIFT THE MOISTURE
EAST AND SOUTH LEAVING JUST A SLIGHT CHANCE OF SHOWERS AND OR
THUNDERSTORMS SOUTH OF A LINE FROM LA PINE TO ENTERPRISE TUESDAY
AFTERNOON AND EVENING. THE LOW WILL SETTLE OVER SOUTHERN BRITISH
COLUMBIA ON WEDNESDAY AND THEN SHIFT EAST INTO ALBERTA ON THURSDAY.
THESE ARE LIKELY TO BE THE COOLEST DAYS THIS WEEK. WESTERLY FLOW
OVER THE FORECAST AREA DURING THIS TIME FAVORS A DRY FORECAST BUT
COULD SEE SOME SHOWERS ALONG THE WASHINGTON CASCADE CREST ON
WEDNESDAY. EXPECT SOME BREEZY WESTERLY WINDS THROUGH WEDNESDAY WHICH
WILL BE A FIRE WEATHER CONCERN AND ADDRESSED IN THAT SECTION.

LONG TERM...THURSDAY NIGHT THROUGH SUNDAY NIGHT...WESTERLY FLOW
THURSDAY WILL SHIFT TO THE SOUTHWEST ON FRIDAY EVENING.  EXPECT
CONDITIONS TO BE MOSTLY DRY THURSDAY NIGHT...WITH INCREASING CHANCES
OF PRECIPITATION BY FRIDAY EVENING...MAINLY OVER THE CENTRAL OREGON
AREA.  DISTURBANCE TO THE SOUTH WILL INCREASE MOISTURE OVER THE
CENTRAL AND NORTHEAST OREGON AREAS ON FRIDAY NIGHT INTO SATURDAY.
MODELS HAVE DIFFERENT SOLUTIONS AFTER THIS TIME PERIOD...WITH
ANOTHER LOW PRESSURE SYSTEM MOVING IN FROM THE GULF OF ALASKA.  GFS
MODEL IS KEEPING MOST OF THE PRECIPITATION TO THE CENTRAL AND
NORTHEAST OREGON...WHILE THE ECMWF CONTINUES THE TROUGH OF LOW
PRESSURE FURTHER SOUTH OFF THE COAST OF OREGON...PROVIDING MORE
WIDESPREAD MOISTURE TO THE AREA.  OVERALL HAVE GONE WITH SLIGHT
CHANCE TO CHANCE SHOWERS AND THUNDERSTORMS THROUGH THE END OF THE
WEEKEND.  TEMPERATURES SHOULD BE IN THE UPPER 80S TO LOWER 90S FOR
THE TIME PERIOD. WEBER

FIRE WEATHER...RED FLAG WARNINGS ARE IN EFFECT FOR THE LOWER
COLUMBIA BASIN AND AREAS NEAR THE EASTERN COLUMBIA RIVER GORGE
THROUGH TUESDAY EVENING. WINDS HAVE INCREASED THIS AFTERNOON
COMPARABLE TO THE FORECAST...BUT RH`S ARE HIGHER THAN WE PREVIOUSLY
ANTICIPATED DUE TO OVERCAST MID LEVEL CLOUDS KEEPING COOLER
TEMPERATURES ACROSS THE REGION. THERE SHOULD BE SOME CLEARING OVER
THE NEXT COUPLE OF HOURS WHICH COULD CAUSE A SIGNIFICANT DROP IN RH
VALUES. TUESDAY WILL BE BREEZY TO WINDY WITH LOW RH`S IN THE WARNING
AREAS.  THE WARNING MAY NEED TO BE EXTENDED INTO WEDNESDAY...AS
CONDITIONS WILL BE SIMILAR. THE DECISION ON WHETHER OR NOT TO EXTEND
THE WARNING WILL BE MADE TOMORROW. AS FAR AS THE THUNDERSTORM
THREAT...THE LIGHTNING ACTIVITY SHOULD BE MINIMAL THIS EVENING AND
ON TUESDAY AND MAINLY FROM THE OCHOCO MOUNTAINS SOUTHWARD.  WISTER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  62  90  57  85 /  10  10   0   0
ALW  66  92  63  86 /  10  10   0  10
PSC  62  94  59  90 /  10   0   0   0
YKM  59  88  56  84 /  10   0   0   0
HRI  62  93  58  88 /  10   0   0   0
ELN  62  87  57  83 /  10   0   0   0
RDM  50  87  46  82 /  20  10  10   0
LGD  55  88  51  82 /  10  10  10  10
GCD  56  91  53  86 /  20  10  10  10
DLS  65  88  60  85 /  10   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR ORZ611-639>641.

WA...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

94




000
FXUS66 KPDT 040314
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
814 PM PDT MON AUG 3 2015

.SHORT TERM...SHORT WAVE SEEN ON WATER VAPOR IMAGERY GENERATED
SHOWERS AND SCATTERED THUNDERSTORMS OVER CENTRAL OREGON THIS
AFTERNOON INTO THE EVENING. RADAR TRENDS INDICATE ACTIVITY IS
DIMINISHING AND WILL ALSO BE MOVING OUT OF THE FORECAST AREA OVER
THE NEXT 2 HOURS. OTHERWISE EXPECT PARTLY TO MOSTLY CLOUDY SKIES
FOR THE REMAINDER OF THE EVENING AND OVERNIGHT. UPPER LOW MOVING
INTO SOUTHERN BC WITH A WESTERLY FLOW ACROSS THE REGION TUESDAY
AND WEDNESDAY. SHOULD HAVE MOSTLY SUNNY SKIES WITH HIGHS IN THE
80S TO LOWER 90S. BREEZY WEST WINDS IN SOME LOCATIONS. 94

&&

.PREV DISCUSSION... /ISSUED 340 PM PDT MON AUG 3 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...REMNANTS OF MOISTURE MOVING
ACROSS THE REGION WILL CONTINUE TO BRING A THREAT OF LIGHT SHOWERS
AND OR THUNDERSTORMS TO CENTRAL AND NORTHEAST OREGON THIS EVENING
AND THE TAPPER OFF TO JUST A FEW SHOWERS OVER THE EASTERN MOUNTAINS
OVERNIGHT. THE UPPER LEVEL LOW ALONG THE CANADIAN COAST WILL BEGIN TO
DOMINATE THE WEATHER PATTERN FOR THE FORECAST AREA ON TUESDAY AS WE
TRANSITION TO A MORE WESTERLY FLOW. THIS WILL SHIFT THE MOISTURE
EAST AND SOUTH LEAVING JUST A SLIGHT CHANCE OF SHOWERS AND OR
THUNDERSTORMS SOUTH OF A LINE FROM LAPINE TO ENTERPRISE TUESDAY
AFTERNOON AND EVENING. THE LOW WILL SETTLE OVER SOUTHERN BRITISH
COLUMBIA ON WEDNESDAY AND THEN SHIFT EAST INTO ALBERTA ON THURSDAY.
THESE ARE LIKELY TO BE THE COOLEST DAYS THIS WEEK. WESTERLY FLOW
OVER THE FORECAST AREA DURING THIS TIME FAVORS A DRY FORECAST BUT
COULD SEE SOME SHOWERS ALONG THE WASHINGTON CASCADE CREST ON
WEDNESDAY. EXPECT SOME BREEZY WESTERLY WINDS THROUGH WEDNESDAY WHICH
WILL BE A FIRE WEATHER CONCERN AND ADDRESSED IN THAT SECTION.

LONG TERM...THURSDAY NIGHT THROUGH SUNDAY NIGHT...WESTERLY FLOW
THURSDAY WILL SHIFT TO THE SOUTHWEST ON FRIDAY EVENING.  EXPECT
CONDITIONS TO BE MOSTLY DRY THURSDAY NIGHT...WITH INCREASING CHANCES
OF PRECIPITATION BY FRIDAY EVENING...MAINLY OVER THE CENTRAL OREGON
AREA.  DISTURBANCE TO THE SOUTH WILL INCREASE MOISTURE OVER THE
CENTRAL AND NORTHEAST OREGON AREAS ON FRIDAY NIGHT INTO SATURDAY.
MODELS HAVE DIFFERENT SOLUTIONS AFTER THIS TIME PERIOD...WITH
ANOTHER LOW PRESSURE SYSTEM MOVING IN FROM THE GULF OF ALASKA.  GFS
MODEL IS KEEPING MOST OF THE PRECIPITATION TO THE CENTRAL AND
NORTHEAST OREGON...WHILE THE ECMWF CONTINUES THE TROUGH OF LOW
PRESSURE FURTHER SOUTH OFF THE COAST OF OREGON...PROVIDING MORE
WIDESPREAD MOISTURE TO THE AREA.  OVERALL HAVE GONE WITH SLIGHT
CHANCE TO CHANCE SHOWERS AND THUNDERSTORMS THROUGH THE END OF THE
WEEKEND.  TEMPERATURES SHOULD BE IN THE UPPER 80S TO LOWER 90S FOR
THE TIME PERIOD. WEBER

AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS.  THUNDERSTORMS CURRENTLY ABOUT 30
MILES SSW OF KBDN AND MOVING VERY SLOWLY.  WILL MONITOR AND UPDATE
THE TAFS AS THEY NEAR.  WINDS WILL INCREASE FROM THE WEST MAINLY IN
THE LOWER COLUMBIA BASIN AND THE GORGE AREA.  EXPECT WINDS TO BE 15-
25KTS.  SKIES WILL BEGIN TO CLEAR AT MOST SITES BETWEEN 6-10Z. WINDS
WILL PICK UP AGAIN TOMORROW AFTERNOON BUT SHOULD ONLY GUST TO ABOUT
20KTS.  SMOKE FROM A WILDFIRE OVER THE BLUE MOUNTAINS MAY INVADE
INTO THE KALW AREA OVERNIGHT...DUE TO DRAINAGE SOUTHEAST WINDS UNDER
THE INVERSION.  WEBER

FIRE WEATHER...RED FLAG WARNINGS ARE IN EFFECT FOR THE LOWER
COLUMBIA BASIN AND AREAS NEAR THE EASTERN COLUMBIA RIVER GORGE
THROUGH TUESDAY EVENING. WINDS HAVE INCREASED THIS AFTERNOON
COMPARABLE TO THE FORECAST...BUT RH`S ARE HIGHER THAN WE PREVIOUSLY
ANTICIPATED DUE TO OVERCAST MID LEVEL CLOUDS KEEPING COOLER
TEMPERATURES ACROSS THE REGION. THERE SHOULD BE SOME CLEARING OVER
THE NEXT COUPLE OF HOURS WHICH COULD CAUSE A SIGNIFICANT DROP IN RH
VALUES. TUESDAY WILL BE BREEZY TO WINDY WITH LOW RH`S IN THE WARNING
AREAS.  THE WARNING MAY NEED TO BE EXTENDED INTO WEDNESDAY...AS
CONDITIONS WILL BE SIMILAR. THE DECISION ON WHETHER OR NOT TO EXTEND
THE WARNING WILL BE MADE TOMORROW. AS FAR AS THE THUNDERSTORM
THREAT...THE LIGHTNING ACTIVITY SHOULD BE MINIMAL THIS EVENING AND
ON TUESDAY AND MAINLY FROM THE OCHOCO MOUNTAINS SOUTHWARD.  WISTER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  62  90  57  85 /  10  10   0   0
ALW  66  92  63  86 /  10  10   0  10
PSC  62  94  59  90 /  10   0   0   0
YKM  59  88  56  84 /  10   0   0   0
HRI  62  93  58  88 /  10   0   0   0
ELN  62  87  57  83 /  10   0   0   0
RDM  50  87  46  82 /  20  10  10   0
LGD  55  88  51  82 /  10  10  10  10
GCD  56  91  53  86 /  20  10  10  10
DLS  65  88  60  85 /  10   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR ORZ611-639>641.

WA...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

94





000
FXUS66 KPDT 032240 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
340 PM PDT MON AUG 3 2015

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH THURSDAY...REMNANTS OF MOISTURE MOVING
ACROSS THE REGION WILL CONTINUE TO BRING A THREAT OF LIGHT SHOWERS
AND OR THUNDERSTORMS TO CENTRAL AND NORTHEAST OREGON THIS EVENING
AND THE TAPPER OFF TO JUST A FEW SHOWERS OVER THE EASTERN MOUNTAINS
OVERNIGHT. THE UPPER LEVEL LOW ALONG THE CANADIAN COAST WILL BEGIN TO
DOMINATE THE WEATHER PATTERN FOR THE FORECAST AREA ON TUESDAY AS WE
TRANSITION TO A MORE WESTERLY FLOW. THIS WILL SHIFT THE MOISTURE
EAST AND SOUTH LEAVING JUST A SLIGHT CHANCE OF SHOWERS AND OR
THUNDERSTORMS SOUTH OF A LINE FROM LAPINE TO ENTERPRISE TUESDAY
AFTERNOON AND EVENING. THE LOW WILL SETTLE OVER SOUTHERN BRITISH
COLUMBIA ON WEDNESDAY AND THEN SHIFT EAST INTO ALBERTA ON THURSDAY.
THESE ARE LIKELY TO BE THE COOLEST DAYS THIS WEEK. WESTERLY FLOW
OVER THE FORECAST AREA DURING THIS TIME FAVORS A DRY FORECAST BUT
COULD SEE SOME SHOWERS ALONG THE WASHINGTON CASCADE CREST ON
WEDNESDAY. EXPECT SOME BREEZY WESTERLY WINDS THROUGH WEDNESDAY WHICH
WILL BE A FIRE WEATHER CONCERN AND ADDRESSED IN THAT SECTION.



.LONG TERM...THURSDAY NIGHT THROUGH SUNDAY NIGHT...WESTERLY FLOW
THURSDAY WILL SHIFT TO THE SOUTHWEST ON FRIDAY EVENING.  EXPECT
CONDITIONS TO BE MOSTLY DRY THURSDAY NIGHT...WITH INCREASING CHANCES
OF PRECIPITATION BY FRIDAY EVENING...MAINLY OVER THE CENTRAL OREGON
AREA.  DISTURBANCE TO THE SOUTH WILL INCREASE MOISTURE OVER THE
CENTRAL AND NORTHEAST OREGON AREAS ON FRIDAY NIGHT INTO SATURDAY.
MODELS HAVE DIFFERENT SOLUTIONS AFTER THIS TIME PERIOD...WITH
ANOTHER LOW PRESSURE SYSTEM MOVING IN FROM THE GULF OF ALASKA.  GFS
MODEL IS KEEPING MOST OF THE PRECIPITATION TO THE CENTRAL AND
NORTHEAST OREGON...WHILE THE ECMWF CONTINUES THE TROUGH OF LOW
PRESSURE FURTHER SOUTH OFF THE COAST OF OREGON...PROVIDING MORE
WIDESPREAD MOISTURE TO THE AREA.  OVERALL HAVE GONE WITH SLIGHT
CHANCE TO CHANCE SHOWERS AND THUNDERSTORMS THROUGH THE END OF THE
WEEKEND.  TEMPERATURES SHOULD BE IN THE UPPER 80S TO LOWER 90S FOR
THE TIME PERIOD. WEBER


&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS.  THUNDERSTORMS CURRENTLY ABOUT 30
MILES SSW OF KBDN AND MOVING VERY SLOWLY.  WILL MONITOR AND UPDATE
THE TAFS AS THEY NEAR.  WINDS WILL INCREASE FROM THE WEST MAINLY IN
THE LOWER COLUMBIA BASIN AND THE GORGE AREA.  EXPECT WINDS TO BE 15-
25KTS.  SKIES WILL BEGIN TO CLEAR AT MOST SITES BETWEEN 6-10Z. WINDS
WILL PICK UP AGAIN TOMORROW AFTERNOON BUT SHOULD ONLY GUST TO ABOUT
20KTS.  SMOKE FROM A WILDFIRE OVER THE BLUE MOUNTAINS MAY INVADE
INTO THE KALW AREA OVERNIGHT...DUE TO DRAINAGE SOUTHEAST WINDS UNDER
THE INVERSION.  WEBER

&&

.FIRE WEATHER...RED FLAG WARNINGS ARE IN EFFECT FOR THE LOWER
COLUMBIA BASIN AND AREAS NEAR THE EASTERN COLUMBIA RIVER GORGE
THROUGH TUESDAY EVENING. WINDS HAVE INCREASED THIS AFTERNOON
COMPARABLE TO THE FORECAST...BUT RH`S ARE HIGHER THAN WE PREVIOUSLY
ANTICIPATED DUE TO OVERCAST MID LEVEL CLOUDS KEEPING COOLER
TEMPERATURES ACROSS THE REGION. THERE SHOULD BE SOME CLEARING OVER
THE NEXT COUPLE OF HOURS WHICH COULD CAUSE A SIGNIFICANT DROP IN RH
VALUES. TUESDAY WILL BE BREEZY TO WINDY WITH LOW RH`S IN THE WARNING
AREAS.  THE WARNING MAY NEED TO BE EXTENDED INTO WEDNESDAY...AS
CONDITIONS WILL BE SIMILAR. THE DECISION ON WHETHER OR NOT TO EXTEND
THE WARNING WILL BE MADE TOMORROW. AS FAR AS THE THUNDERSTORM
THREAT...THE LIGHTNING ACTIVITY SHOULD BE MINIMAL THIS EVENING AND
ON TUESDAY AND MAINLY FROM THE OCHOCO MOUNTAINS SOUTHWARD.  WISTER


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64  90  60  85 /  10  10   0   0
ALW  68  92  66  86 /  10  10   0  10
PSC  64  94  62  90 /  10   0   0   0
YKM  62  88  59  84 /  10   0   0   0
HRI  64  93  61  88 /  10   0   0   0
ELN  65  87  60  83 /  10   0   0   0
RDM  50  87  48  82 /  20  10  10   0
LGD  55  88  53  82 /  20  10  10  10
GCD  56  91  55  86 /  20  10  10  10
DLS  67  88  63  85 /  10   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR ORZ639-641.

WA...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89




000
FXUS66 KPDT 032112
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
212 PM PDT MON AUG 3 2015

.SHORT TERM...TONIGHT THROUGH THURSDAY...REMNANTS OF MOISTURE MOVING
ACROSS THE REGION WILL CONTINUE TO BRING A THREAT OF LIGHT SHOWERS
AND OR THUNDERSTORMS TO CENTRAL AND NORTHEAST OREGON THIS EVENING
AND THE TAPPER OFF TO JUST A FEW SHOWERS OVER THE EASTERN MOUNTAINS
OVERNIGHT. THE UPPER LEVEL ALONG THE CANADIAN COAST WILL BEGIN TO
DOMINATE THE WEATHER PATTERN FOR THE FORECAST AREA ON TUESDAY AS WE
TRANSITION TO A MORE WESTERLY FLOW. THIS WILL SHIFT THE MOISTURE
EAST AND SOUTH LEAVING JUST A SLIGHT CHANCE OF SHOWERS AND OR
THUNDERSTORMS SOUTH OF A LINE FROM LAPINE TO ENTERPRISE TUESDAY
AFTERNOON AND EVENING. THE LOW WILL SETTLE OVER SOUTHERN BRITISH
COLUMBIA ON WEDNESDAY AND THEN SHIFT EAST INTO ALBERTA ON THURSDAY.
THESE ARE LIKELY TO BE THE COOLEST DAYS THIS WEEK. WESTERLY FLOW
OVER THE FORECAST AREA DURING THIS TIME FAVORS A DRY FORECAST BUT
COULD SEE SOME SHOWERS ALONG THE WASHINGTON CASCADE CREST ON
WEDNESDAY. EXPECT SOME BREEZY WESTERLY WINDS THROUGH WEDNESDAY WHICH
WILL BE A FIRE WEATHER CONCERN AND ADDRESSED IN THAT SECTION.



.LONG TERM...THURSDAY NIGHT THROUGH SUNDAY NIGHT...WESTERLY FLOW
THURSDAY WILL SHIFT TO THE SOUTHWEST ON FRIDAY EVENING.  EXPECT
CONDITIONS TO BE MOSTLY DRY THURSDAY NIGHT...WITH INCREASING CHANCES
OF PRECIPITATION BY FRIDAY EVENING...MAINLY OVER THE CENTRAL OREGON
AREA.  DISTURBANCE TO THE SOUTH WILL INCREASE MOISTURE OVER THE
CENTRAL AND NORTHEAST OREGON AREAS ON FRIDAY NIGHT INTO SATURDAY.
MODELS HAVE DIFFERENT SOLUTIONS AFTER THIS TIME PERIOD...WITH
ANOTHER LOW PRESSURE SYSTEM MOVING IN FROM THE GULF OF ALASKA.  GFS
MODEL IS KEEPING MOST OF THE PRECIPITATION TO THE CENTRAL AND
NORTHEAST OREGON...WHILE THE ECMWF CONTINUES THE TROUGH OF LOW
PRESSURE FURTHER SOUTH OFF THE COAST OF OREGON...PROVIDING MORE
WIDESPREAD MOISTURE TO THE AREA.  OVERALL HAVE GONE WITH SLIGHT
CHANCE TO CHANCE SHOWERS AND THUNDERSTORMS THROUGH THE END OF THE
WEEKEND.  TEMPERATURES SHOULD BE IN THE UPPER 80S TO LOWER 90S FOR
THE TIME PERIOD. WEBER


&&

.AVIATION...PREVIOUS DISCUSSION 18Z TAFS...VFR CONDITIONS WILL
PREVAIL DURING THE NEXT 24 HOURS AT ALL TAF SITES. THERE MAY BE
BRIEF MVFR AT KBDN AND KRDM THIS AFTERNOON DUE TO SHOWERS.
THUNDERSTORMS WILL BE POSSIBLE AS WELL...BUT WILL WAIT AND AMEND
TAFS AS NEEDED...DUE TO LOW CONFIDENCE. WINDS WILL INCREASE FROM THE
WEST MAINLY IN THE LOWER COLUMBIA BASIN AND THE GORGE AREA.  EXPECT
WINDS TO BE 15-25KTS.  WEBER


&&

.FIRE WEATHER...RED FLAG WARNINGS ARE IN EFFECT FOR THE LOWER
COLUMBIA BASIN AND AREAS NEAR THE EASTERN COLUMBIA RIVER GORGE
THROUGH TUESDAY EVENING. WINDS HAVE INCREASED THIS AFTERNOON
COMPARABLE TO THE FORECAST...BUT RH`S ARE HIGHER THAN WE PREVIOUSLY
ANTICIPATED DUE TO OVERCAST MID LEVEL CLOUDS KEEPING COOLER
TEMPERATURES ACROSS THE REGION. THERE SHOULD BE SOME CLEARING OVER
THE NEXT COUPLE OF HOURS WHICH COULD CAUSE A SIGNIFICANT DROP IN RH
VALUES. TUESDAY WILL BE BREEZY TO WINDY WITH LOW RH`S IN THE WARNING
AREAS.  THE WARNING MAY NEED TO BE EXTENDED INTO WEDNESDAY...AS
CONDITIONS WILL BE SIMILAR. THE DECISION ON WHETHER OR NOT TO EXTEND
THE WARNING WILL BE MADE TOMORROW. AS FAR AS THE THUNDERSTORM
THREAT...THE LIGHTNING ACTIVITY SHOULD BE MINIMAL THIS EVENING AND
ON TUESDAY AND MAINLY FROM THE OCHOCO MOUNTAINS SOUTHWARD.  WISTER


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64  90  60  85 /  10  10   0   0
ALW  68  92  66  86 /  10  10   0  10
PSC  64  94  62  90 /  10   0   0   0
YKM  62  88  59  84 /  10   0   0   0
HRI  64  93  61  88 /  10   0   0   0
ELN  65  87  60  83 /  10   0   0   0
RDM  50  87  48  82 /  20  10  10   0
LGD  55  88  53  82 /  20  10  10  10
GCD  56  91  55  86 /  20  10  10  10
DLS  67  88  63  85 /  10   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR ORZ639-641.

WA...RED FLAG WARNING UNTIL 9 PM PDT TUESDAY FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89




000
FXUS66 KPDT 031720 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1020 AM PDT MON AUG 3 2015

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY AND TONIGHT...SOUTHERLY FLOW CONTINUES TO PUMP
MOISTURE INTO THE REGION TODAY PRODUCING MOSTLY CLOUDY SKIES. THERE
WILL BE SOME ISOLATED TO SCATTERED SHOWERS OVER CENTRAL AND EASTERN
OREGON MAINLY THIS AFTERNOON AND EVENING ALONG WITH A FEW ISOLATED
THUNDERSTORMS. REST OF THE FORECAST AREA WILL SEE MOSTLY CLOUDY
CONDITIONS WITH PERHAPS SOME BRIEF SPRINKLES BUT NOT EXPECTING ANY
MEASURABLE RAINFALL. CLOUDY COVER WILL HELP HOLD TEMPERATURES DOWN
TODAY SO AS TO NOT BE SO HOT AS PAST DAYS. ALSO EXPECT SOME
INCREASING BREEZY WESTERLY WINDS DURING THE AFTERNOON AND EVENING
PERIOD THEN DECREASING OVERNIGHT.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS.  THUNDERSTORMS WILL BE POSSIBLE AS
WELL...BUT WILL WAIT AND AMEND TAFS AS NEEDED...DUE TO LOW
CONFIDENCE. WINDS WILL INCREASE FROM THE WEST MAINLY IN THE LOWER
COLUMBIA BASIN AND THE GORGE AREA.  EXPECT WINDS TO BE 15-25KTS.
WEBER

&&

.FIRE WEATHER...FIRE WEATHER WATCHES FOR THE LOWER COLUMBIA BASIN
AND THE EAST SLOPES OF THE WASHINGTON AND OREGON CASCADES HAVE BEEN
UPGRADED TO RED FLAG WARNINGS IN EFFECT FROM NOON TODAY THROUGH 9 PM
TUESDAY EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY.  THE
UPPER LOW MOVING SOUTH FROM BRITISH COLUMBIA WILL CREATE A WESTERLY
FLOW OVER WASHINGTON AND NORTHERN OREGON AND WILL ALSO ALLOW THE
ONSHORE FLOW TO DEEPEN THE MARINE LAYER WEST OF THE CASCADES. THIS
WILL CAUSE MARINE AIR TO SPILL THROUGH THE CASCADE GAPS AND THE
COLUMBIA RIVER GORGE FOR INCREASING WIND IN THE WARNING AREAS. RH`S
HAVE BEEN BRUTALLY LOW OVER THE WEEKEND (5-15 PERCENT) AND WILL ONLY
INCREASE INTO THE TEENS TO LOWER 20S TODAY AND TUESDAY. WISTER


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT MON AUG 3 2015/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  91  64  91  56 /  10  10  10  10
ALW  92  68  92  63 /  10  10  10  10
PSC  95  64  95  56 /  10  10   0   0
YKM  89  62  91  55 /  10  10   0   0
HRI  94  64  94  55 /  10  10   0   0
ELN  91  65  87  58 /  10  10   0   0
RDM  86  50  88  46 /  20  20  10  10
LGD  87  55  88  49 /  20  20  20  10
GCD  90  56  91  50 /  20  20  20  10
DLS  91  67  88  58 /  10  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR ORZ639-
     641.

WA...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR WAZ639-
     641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89




000
FXUS66 KPDT 031720 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1020 AM PDT MON AUG 3 2015

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY AND TONIGHT...SOUTHERLY FLOW CONTINUES TO PUMP
MOISTURE INTO THE REGION TODAY PRODUCING MOSTLY CLOUDY SKIES. THERE
WILL BE SOME ISOLATED TO SCATTERED SHOWERS OVER CENTRAL AND EASTERN
OREGON MAINLY THIS AFTERNOON AND EVENING ALONG WITH A FEW ISOLATED
THUNDERSTORMS. REST OF THE FORECAST AREA WILL SEE MOSTLY CLOUDY
CONDITIONS WITH PERHAPS SOME BRIEF SPRINKLES BUT NOT EXPECTING ANY
MEASURABLE RAINFALL. CLOUDY COVER WILL HELP HOLD TEMPERATURES DOWN
TODAY SO AS TO NOT BE SO HOT AS PAST DAYS. ALSO EXPECT SOME
INCREASING BREEZY WESTERLY WINDS DURING THE AFTERNOON AND EVENING
PERIOD THEN DECREASING OVERNIGHT.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS.  THUNDERSTORMS WILL BE POSSIBLE AS
WELL...BUT WILL WAIT AND AMEND TAFS AS NEEDED...DUE TO LOW
CONFIDENCE. WINDS WILL INCREASE FROM THE WEST MAINLY IN THE LOWER
COLUMBIA BASIN AND THE GORGE AREA.  EXPECT WINDS TO BE 15-25KTS.
WEBER

&&

.FIRE WEATHER...FIRE WEATHER WATCHES FOR THE LOWER COLUMBIA BASIN
AND THE EAST SLOPES OF THE WASHINGTON AND OREGON CASCADES HAVE BEEN
UPGRADED TO RED FLAG WARNINGS IN EFFECT FROM NOON TODAY THROUGH 9 PM
TUESDAY EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY.  THE
UPPER LOW MOVING SOUTH FROM BRITISH COLUMBIA WILL CREATE A WESTERLY
FLOW OVER WASHINGTON AND NORTHERN OREGON AND WILL ALSO ALLOW THE
ONSHORE FLOW TO DEEPEN THE MARINE LAYER WEST OF THE CASCADES. THIS
WILL CAUSE MARINE AIR TO SPILL THROUGH THE CASCADE GAPS AND THE
COLUMBIA RIVER GORGE FOR INCREASING WIND IN THE WARNING AREAS. RH`S
HAVE BEEN BRUTALLY LOW OVER THE WEEKEND (5-15 PERCENT) AND WILL ONLY
INCREASE INTO THE TEENS TO LOWER 20S TODAY AND TUESDAY. WISTER


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT MON AUG 3 2015/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  91  64  91  56 /  10  10  10  10
ALW  92  68  92  63 /  10  10  10  10
PSC  95  64  95  56 /  10  10   0   0
YKM  89  62  91  55 /  10  10   0   0
HRI  94  64  94  55 /  10  10   0   0
ELN  91  65  87  58 /  10  10   0   0
RDM  86  50  88  46 /  20  20  10  10
LGD  87  55  88  49 /  20  20  20  10
GCD  90  56  91  50 /  20  20  20  10
DLS  91  67  88  58 /  10  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR ORZ639-
     641.

WA...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR WAZ639-
     641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89





000
FXUS66 KPDT 031540
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
839 AM PDT MON AUG 3 2015

.SHORT TERM...TODAY AND TONIGHT...SOUTHERLY FLOW CONTINUES TO PUMP
MOISTURE INTO THE REGION TODAY PRODUCING MOSTLY CLOUDY SKIES. THERE
WILL BE SOME ISOLATED TO SCATTERED SHOWERS OVER CENTRAL AND EASTERN
OREGON MAINLY THIS AFTERNOON AND EVENING ALONG WITH A FEW ISOLATED
THUNDERSTORMS. REST OF THE FORECAST AREA WILL SEE MOSTLY CLOUDY
CONDITIONS WITH PERHAPS SOME BRIEF SPRINKLES BUT NOT EXPECTING ANY
MEASURABLE RAINFALL. CLOUDY COVER WILL HELP HOLD TEMPERATURES DOWN
TODAY SO AS TO NOT BE SO HOT AS PAST DAYS. ALSO EXPECT SOME
INCREASING BREEZY WESTERLY WINDS DURING THE AFTERNOON AND EVENING
PERIOD THEN DECREASING OVERNIGHT.



&&

.FIRE WEATHER...FIRE WEATHER WATCHES FOR THE LOWER COLUMBIA BASIN
AND THE EAST SLOPES OF THE WASHINGTON AND OREGON CASCADES HAVE BEEN
UPGRADED TO RED FLAG WARNINGS IN EFFECT FROM NOON TODAY THROUGH 9 PM
TUESDAY EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY.  THE
UPPER LOW MOVING SOUTH FROM BRITISH COLUMBIA WILL CREATE A WESTERLY
FLOW OVER WASHINGTON AND NORTHERN OREGON AND WILL ALSO ALLOW THE
ONSHORE FLOW TO DEEPEN THE MARINE LAYER WEST OF THE CASCADES. THIS
WILL CAUSE MARINE AIR TO SPILL THROUGH THE CASCADE GAPS AND THE
COLUMBIA RIVER GORGE FOR INCREASING WIND IN THE WARNING AREAS. RH`S
HAVE BEEN BRUTALLY LOW OVER THE WEEKEND (5-15 PERCENT) AND WILL ONLY
INCREASE INTO THE TEENS TO LOWER 20S TODAY AND TUESDAY. WISTER


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT MON AUG 3 2015/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE
FROM THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING
VALLEYS AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE
REGION TODAY.  POLAN

FIRE WEATHER...STILL ANTICIPATE THE POTENTIAL FOR INCREASED AND
GUSTY WINDS TODAY IN AND NEAR THE COLUMBIA RIVER GORGE AND PORTIONS
OF THE COLUMBIA BASIN. THESE WINDS SHOULD DECREASE LATE THIS
EVENING, THEN INCREASE AGAIN TUESDAY. AT THE SAME TIME MINIMUM
RELATIVE HUMIDITIES WILL IMPROVE FROM THE VERY LOW VALUES THIS
WEEKEND, BUT WILL REMAIN LOW. THUS WILL CONTINUE THE CURRENT RED
FLAG WATCHES. ALSO THUNDERSTORMS ACROSS THE SOUTHERN DISTRICTS WILL
HAVE TO BE MONITORED FOR THE POTENTIAL OF ABUNDANT LIGHTNING THIS
AFTERNOON AND EVENING. AT THIS TIME CONFIDENCE IN THE AMOUNT OF
LIGHTNING IS NOT HIGH ENOUGH TO ISSUE ANY WATCHES OR WARNINGS. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  91  64  91  56 /  10  10  10  10
ALW  92  68  92  63 /  10  10  10  10
PSC  95  64  95  56 /  10  10   0   0
YKM  89  62  91  55 /  10  10   0   0
HRI  94  64  94  55 /  10  10   0   0
ELN  91  65  87  58 /  10  10   0   0
RDM  86  50  88  46 /  20  20  10  10
LGD  87  55  88  49 /  20  20  20  10
GCD  90  56  91  50 /  20  20  20  10
DLS  91  67  88  58 /  10  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR ORZ639-
     641.

WA...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR WAZ639-
     641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89





000
FXUS66 KPDT 031540
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
839 AM PDT MON AUG 3 2015

.SHORT TERM...TODAY AND TONIGHT...SOUTHERLY FLOW CONTINUES TO PUMP
MOISTURE INTO THE REGION TODAY PRODUCING MOSTLY CLOUDY SKIES. THERE
WILL BE SOME ISOLATED TO SCATTERED SHOWERS OVER CENTRAL AND EASTERN
OREGON MAINLY THIS AFTERNOON AND EVENING ALONG WITH A FEW ISOLATED
THUNDERSTORMS. REST OF THE FORECAST AREA WILL SEE MOSTLY CLOUDY
CONDITIONS WITH PERHAPS SOME BRIEF SPRINKLES BUT NOT EXPECTING ANY
MEASURABLE RAINFALL. CLOUDY COVER WILL HELP HOLD TEMPERATURES DOWN
TODAY SO AS TO NOT BE SO HOT AS PAST DAYS. ALSO EXPECT SOME
INCREASING BREEZY WESTERLY WINDS DURING THE AFTERNOON AND EVENING
PERIOD THEN DECREASING OVERNIGHT.



&&

.FIRE WEATHER...FIRE WEATHER WATCHES FOR THE LOWER COLUMBIA BASIN
AND THE EAST SLOPES OF THE WASHINGTON AND OREGON CASCADES HAVE BEEN
UPGRADED TO RED FLAG WARNINGS IN EFFECT FROM NOON TODAY THROUGH 9 PM
TUESDAY EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY.  THE
UPPER LOW MOVING SOUTH FROM BRITISH COLUMBIA WILL CREATE A WESTERLY
FLOW OVER WASHINGTON AND NORTHERN OREGON AND WILL ALSO ALLOW THE
ONSHORE FLOW TO DEEPEN THE MARINE LAYER WEST OF THE CASCADES. THIS
WILL CAUSE MARINE AIR TO SPILL THROUGH THE CASCADE GAPS AND THE
COLUMBIA RIVER GORGE FOR INCREASING WIND IN THE WARNING AREAS. RH`S
HAVE BEEN BRUTALLY LOW OVER THE WEEKEND (5-15 PERCENT) AND WILL ONLY
INCREASE INTO THE TEENS TO LOWER 20S TODAY AND TUESDAY. WISTER


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT MON AUG 3 2015/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE
FROM THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING
VALLEYS AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE
REGION TODAY.  POLAN

FIRE WEATHER...STILL ANTICIPATE THE POTENTIAL FOR INCREASED AND
GUSTY WINDS TODAY IN AND NEAR THE COLUMBIA RIVER GORGE AND PORTIONS
OF THE COLUMBIA BASIN. THESE WINDS SHOULD DECREASE LATE THIS
EVENING, THEN INCREASE AGAIN TUESDAY. AT THE SAME TIME MINIMUM
RELATIVE HUMIDITIES WILL IMPROVE FROM THE VERY LOW VALUES THIS
WEEKEND, BUT WILL REMAIN LOW. THUS WILL CONTINUE THE CURRENT RED
FLAG WATCHES. ALSO THUNDERSTORMS ACROSS THE SOUTHERN DISTRICTS WILL
HAVE TO BE MONITORED FOR THE POTENTIAL OF ABUNDANT LIGHTNING THIS
AFTERNOON AND EVENING. AT THIS TIME CONFIDENCE IN THE AMOUNT OF
LIGHTNING IS NOT HIGH ENOUGH TO ISSUE ANY WATCHES OR WARNINGS. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  91  64  91  56 /  10  10  10  10
ALW  92  68  92  63 /  10  10  10  10
PSC  95  64  95  56 /  10  10   0   0
YKM  89  62  91  55 /  10  10   0   0
HRI  94  64  94  55 /  10  10   0   0
ELN  91  65  87  58 /  10  10   0   0
RDM  86  50  88  46 /  20  20  10  10
LGD  87  55  88  49 /  20  20  20  10
GCD  90  56  91  50 /  20  20  20  10
DLS  91  67  88  58 /  10  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR ORZ639-
     641.

WA...RED FLAG WARNING FROM NOON TODAY TO 9 PM PDT TUESDAY FOR WAZ639-
     641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

91/89/89




000
FXUS66 KPDT 031007
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT MON AUG 3 2015

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE
FROM THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING
VALLEYS AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE
REGION TODAY.  POLAN

&&

.FIRE WEATHER...STILL ANTICIPATE THE POTENTIAL FOR INCREASED AND
GUSTY WINDS TODAY IN AND NEAR THE COLUMBIA RIVER GORGE AND PORTIONS
OF THE COLUMBIA BASIN. THESE WINDS SHOULD DECREASE LATE THIS
EVENING, THEN INCREASE AGAIN TUESDAY. AT THE SAME TIME MINIMUM
RELATIVE HUMIDITIES WILL IMPROVE FROM THE VERY LOW VALUES THIS
WEEKEND, BUT WILL REMAIN LOW. THUS WILL CONTINUE THE CURRENT RED
FLAG WATCHES. ALSO THUNDERSTORMS ACROSS THE SOUTHERN DISTRICTS WILL
HAVE TO BE MONITORED FOR THE POTENTIAL OF ABUNDANT LIGHTNING THIS
AFTERNOON AND EVENING. AT THIS TIME CONFIDENCE IN THE AMOUNT OF
LIGHTNING IS NOT HIGH ENOUGH TO ISSUE ANY WATCHES OR WARNINGS. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  92  60  91  56 /  20  10  10  10
ALW  93  66  92  63 /  10  10  10  10
PSC  97  62  95  56 /  10  10   0   0
YKM  93  60  91  55 /  10  10   0   0
HRI  95  62  94  55 /  10  10   0   0
ELN  92  62  87  58 /  10  10   0   0
RDM  88  49  88  46 /  30  20  10  10
LGD  89  53  88  49 /  20  20  20  10
GCD  91  54  91  50 /  30  30  20  10
DLS  91  63  88  58 /  20  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR ORZ639-641.

WA...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99/90




000
FXUS66 KPDT 031007
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT MON AUG 3 2015

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE
FROM THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING
VALLEYS AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE
REGION TODAY.  POLAN

&&

.FIRE WEATHER...STILL ANTICIPATE THE POTENTIAL FOR INCREASED AND
GUSTY WINDS TODAY IN AND NEAR THE COLUMBIA RIVER GORGE AND PORTIONS
OF THE COLUMBIA BASIN. THESE WINDS SHOULD DECREASE LATE THIS
EVENING, THEN INCREASE AGAIN TUESDAY. AT THE SAME TIME MINIMUM
RELATIVE HUMIDITIES WILL IMPROVE FROM THE VERY LOW VALUES THIS
WEEKEND, BUT WILL REMAIN LOW. THUS WILL CONTINUE THE CURRENT RED
FLAG WATCHES. ALSO THUNDERSTORMS ACROSS THE SOUTHERN DISTRICTS WILL
HAVE TO BE MONITORED FOR THE POTENTIAL OF ABUNDANT LIGHTNING THIS
AFTERNOON AND EVENING. AT THIS TIME CONFIDENCE IN THE AMOUNT OF
LIGHTNING IS NOT HIGH ENOUGH TO ISSUE ANY WATCHES OR WARNINGS. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  92  60  91  56 /  20  10  10  10
ALW  93  66  92  63 /  10  10  10  10
PSC  97  62  95  56 /  10  10   0   0
YKM  93  60  91  55 /  10  10   0   0
HRI  95  62  94  55 /  10  10   0   0
ELN  92  62  87  58 /  10  10   0   0
RDM  88  49  88  46 /  30  20  10  10
LGD  89  53  88  49 /  20  20  20  10
GCD  91  54  91  50 /  30  30  20  10
DLS  91  63  88  58 /  20  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR ORZ639-641.

WA...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99/90





000
FXUS66 KPDT 031007
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT MON AUG 3 2015

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...AN UPPER LEVEL TROUGH OF
LOW PRESSURE WILL SETTLE OVER BRITISH COLUMBIA AND THE PACIFIC
NORTHWEST THROUGH THIS PERIOD. THE CENTRAL LOW PRESSURE WITH THIS
TROUGH WILL REMAIN OVER BRITISH COLUMBIA. THUS WILL SEE THE SOUTH-
SOUTHWEST FLOW OVER THE REGION GRADUALLY SHIFT TO THE WEST-
SOUTHWEST. THUS WILL GRADUALLY SEE MUCH OF THE MOISTURE OVER THE
PACNW BE PUSHED EAST OF THE REGION. THERE WILL REMAIN THE POTENTIAL
FOR THUNDERSTORMS OVER THE REGION TODAY. THE BEST CHANCES LOOK TO BE
ACROSS CENTRAL AND EAST-CENTRAL OREGON, WITH LESSER CHANCES INTO THE
BLUE MOUNTAINS, GRANDE RONDE VALLEY AND WALLOWA COUNTY. ELSEWHERE
TODAY EXPECT ONLY A FEW SHOWERS OR LIGHT SPRINKLES. LOW LEVEL FLOW
WILL BE INCREASINGLY WESTERLY TODAY. THUS EXPECT COOLER HIGH TEMPS
AT MOST, IF NOT ALL, LOCATIONS. AS THE MOISTURE OVER THE REGION
SHIFTS EAST TONIGHT AND ON TUESDAY WILL SEE CHANCES OF SHOWERS OR
THUNDERSTORMS DECREASE SUCH THAT ONLY OUR EASTERN AND SOUTHERN MOST
AREAS SHOULD BE AFFECTED. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY NIGHT...A PROGRESSIVE ZONAL
PATTERN IN THE WESTERLIES WITH A LARGE LONGWAVE MID/UPPER LEVEL LOW
PRESSURE SYSTEM OVER BRITISH COLUMBIA ON WEDNESDAY SETS UP A
SOUTHWEST FLOW ALOFT ACROSS INTERIOR PACIFIC NORTHWEST WITH STABLE
AIRMASS FOR A SLIGHT CHANCE OF OROGRAPHIC SHOWERS OVER FAR EASTERN
MOUNTAINS OF OREGON WEDNESDAY MORNING. A WEAK LOW AMPLITUDE
SHORTWAVE MOVES RAPIDLY THROUGH SOUTHEAST WASHINGTON AND NORTHEAST
OREGON WEDNESDAY AFTERNOON/EVENING FOR A SLIGHT CHANCE OF AN
AFTERNOON THUNDERSTORM IN THE WALLOWA MOUNTAINS AND ALONG HIGH RIDGE
IN FAR EASTERN WALLOWA COUNTY. THE SLIGHT CHANCE OF THUNDERSTORMS
ENDS BEFORE SUNSET WEDNESDAY. WEDNESDAY NIGHT THE AFOREMENTIONED LOW
MOVES SOUTHEAST AND INTO IDAHO/MONTANA BY DAYBREAK THURSDAY. AS THE
FORECAST AREA WILL BE ON THE DRY SOUTHERN FLANK OF THE LOW, WE WILL
HAVE DRY CONDITIONS WEDNESDAY NIGHT AND THURSDAY. THURSDAY NIGHT
INTO FRIDAY MORNING A MIGRATORY HIGH PRESSURE RIDGE MOVES ACROSS
FORECAST AREA FOR DRY CONDITIONS. FRIDAY AFTERNOON A MID/UPPER
LEVEL LOW MOVES INTO CALIFORNIA AND ALLOWS SOME MID LEVEL MOISTURE
TO MOVE INTO CENTRAL OREGON FOR SLIGHT CHANCE OF AFTERNOON/EVENING
THUNDERSTORMS. THE LOW MOVES NORTHEAST THROUGH EASTERN OREGON FOR A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY. FRIDAY NIGHT THROUGH SUNDAY NIGHT A SOUTHWEST FLOW ALOFT
ALLOWS AN INFLUX OF ADDITIONAL MOISTURE INTO CENTRAL AND EASTERN
OREGON FOR A CHANCE OF SHOWERS AND THUNDERSTORMS. POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
THIS AFTERNOON DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE
FROM THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING
VALLEYS AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE
REGION TODAY.  POLAN

&&

.FIRE WEATHER...STILL ANTICIPATE THE POTENTIAL FOR INCREASED AND
GUSTY WINDS TODAY IN AND NEAR THE COLUMBIA RIVER GORGE AND PORTIONS
OF THE COLUMBIA BASIN. THESE WINDS SHOULD DECREASE LATE THIS
EVENING, THEN INCREASE AGAIN TUESDAY. AT THE SAME TIME MINIMUM
RELATIVE HUMIDITIES WILL IMPROVE FROM THE VERY LOW VALUES THIS
WEEKEND, BUT WILL REMAIN LOW. THUS WILL CONTINUE THE CURRENT RED
FLAG WATCHES. ALSO THUNDERSTORMS ACROSS THE SOUTHERN DISTRICTS WILL
HAVE TO BE MONITORED FOR THE POTENTIAL OF ABUNDANT LIGHTNING THIS
AFTERNOON AND EVENING. AT THIS TIME CONFIDENCE IN THE AMOUNT OF
LIGHTNING IS NOT HIGH ENOUGH TO ISSUE ANY WATCHES OR WARNINGS. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  92  60  91  56 /  20  10  10  10
ALW  93  66  92  63 /  10  10  10  10
PSC  97  62  95  56 /  10  10   0   0
YKM  93  60  91  55 /  10  10   0   0
HRI  95  62  94  55 /  10  10   0   0
ELN  92  62  87  58 /  10  10   0   0
RDM  88  49  88  46 /  30  20  10  10
LGD  89  53  88  49 /  20  20  20  10
GCD  91  54  91  50 /  30  30  20  10
DLS  91  63  88  58 /  20  10   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR ORZ639-641.

WA...FIRE WEATHER WATCH FROM NOON PDT TODAY THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99/90





000
FXUS66 KPDT 030242
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
742 PM PDT SUN AUG 2 2015

.UPDATE...NUMEROUS SHOWERS WITH A FEW EMBEDDED THUNDERSTORMS
CONTINUE WEST OF THE CASCADES AND SOUTH OF THE CWA IN LAKE AND
KLAMATH COUNTIES. MORE SHOWERS ARE ALSO SEEN ON RADAR OVER KITTITAS
COUNTY AND SOME OVER BENTON AND FRANKLIN COUNTIES...BUT IT`S
DOUBTFUL THAT ANY RAIN IS REACHING THE GROUND WITH SUCH HOT AND DRY
AIR AT THE SURFACE IN BENTON AND FRANKLIN COUNTIES. THE UPPER RIDGE
THAT HAS BROUGHT THE VERY HOT AND DRY CONDITIONS DURING THE PAST 4
DAYS WILL MOVE TO THE EAST TONIGHT AND EARLY MONDAY AND ALLOW AN
UPPER TROUGH TO BEGIN MOVING INTO THE REGION. THERE WILL BE
INCREASING SUBTROPICAL MOISTURE AND INSTABILITY TO THE EAST AND
SOUTHEAST OF THIS TROUGH AND AS A RESULT THERE MAY BE SOME
THUNDERSTORMS OVER SOUTHERN AND EASTERN PORTIONS OF THE CWA (MAINLY
FROM THE BLUE MOUNTAINS SOUTHWARD AND EASTWARD) ON MONDAY. ELSEWHERE
TO THE NORTH AND WEST COOLER AND MORE STABLE AIR WILL MOVE INTO
THOSE AREAS. THE BEST CHANCE OF THUNDERSTORMS WILL BE IN CENTRAL
OREGON WHERE THE INSTABILITY AND MOISTURE WILL BE THE GREATEST.
TEMPERATURES ON MONDAY WILL BE ABOUT 8-12 DEGREES COOLER ACROSS THE
CWA...WITH THE GREATEST COOLING OVER NORTHERN AND WESTERN AREAS. THE
COOLING TREND WILL CONTINUE THROUGH MID WEEK WITH DRIER AND MORE
STABLE AIR MOVING INTO THE REGION. THE HEAT ADVISORY WILL END AT 9
PM THIS EVENING ALONG WITH RED FLAG WARNINGS FOR PORTIONS OF THE
FIRE WEATHER DISTRICT. PLEASE REFER TO THE FIRE WEATHER DISCUSSION
FOR DETAILS ABOUT THE RED FLAG WARNINGS. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
ON MONDAY DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE FROM
THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING VALLEYS
AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE REGION ON
MONDAY. 88

&&

.FIRE WEATHER...WILL LET THE RED FLAG WARNINGS FOR FIRE ZONES
639...641 AND 643 FOR HOT AND DRY CONDITIONS WITH HIGH HAINES INDEX
EXPIRE AS SCHEDULED AT 9 PM THIS EVENING. WILL CONTINUE THE FIRE
WEATHER WATCH FOR MONDAY AFTERNOON THROUGH TUESDAY EVENING FOR GUSTY
WINDS AND LOW RELATIVE HUMIDITIES FOR FIRE ZONE WA675 (THE KITTITAS
VALLEY). AS COOLER MARINE AIR PUSHES EASTWARD INTO THE DISTRICT
LATER TONIGHT AND ON MONDAY THE HIGH HAINES THREAT WILL DECREASE AND
CRITICAL FIRE CONDITIONS WILL NO LONGER EXIST. HOWEVER GUSTY WINDS
AND LOW RELATIVE HUMIDITIES IN ZONE WA675 MAY CREATE CRITICAL FIRE
CONDITIONS FROM MONDAY AFTERNOON THROUGH TUESDAY. 88

&&

.PREV DISCUSSION... /ISSUED 425 PM PDT SUN AUG 2 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/77/88/88





000
FXUS66 KPDT 030242
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
742 PM PDT SUN AUG 2 2015

.UPDATE...NUMEROUS SHOWERS WITH A FEW EMBEDDED THUNDERSTORMS
CONTINUE WEST OF THE CASCADES AND SOUTH OF THE CWA IN LAKE AND
KLAMATH COUNTIES. MORE SHOWERS ARE ALSO SEEN ON RADAR OVER KITTITAS
COUNTY AND SOME OVER BENTON AND FRANKLIN COUNTIES...BUT IT`S
DOUBTFUL THAT ANY RAIN IS REACHING THE GROUND WITH SUCH HOT AND DRY
AIR AT THE SURFACE IN BENTON AND FRANKLIN COUNTIES. THE UPPER RIDGE
THAT HAS BROUGHT THE VERY HOT AND DRY CONDITIONS DURING THE PAST 4
DAYS WILL MOVE TO THE EAST TONIGHT AND EARLY MONDAY AND ALLOW AN
UPPER TROUGH TO BEGIN MOVING INTO THE REGION. THERE WILL BE
INCREASING SUBTROPICAL MOISTURE AND INSTABILITY TO THE EAST AND
SOUTHEAST OF THIS TROUGH AND AS A RESULT THERE MAY BE SOME
THUNDERSTORMS OVER SOUTHERN AND EASTERN PORTIONS OF THE CWA (MAINLY
FROM THE BLUE MOUNTAINS SOUTHWARD AND EASTWARD) ON MONDAY. ELSEWHERE
TO THE NORTH AND WEST COOLER AND MORE STABLE AIR WILL MOVE INTO
THOSE AREAS. THE BEST CHANCE OF THUNDERSTORMS WILL BE IN CENTRAL
OREGON WHERE THE INSTABILITY AND MOISTURE WILL BE THE GREATEST.
TEMPERATURES ON MONDAY WILL BE ABOUT 8-12 DEGREES COOLER ACROSS THE
CWA...WITH THE GREATEST COOLING OVER NORTHERN AND WESTERN AREAS. THE
COOLING TREND WILL CONTINUE THROUGH MID WEEK WITH DRIER AND MORE
STABLE AIR MOVING INTO THE REGION. THE HEAT ADVISORY WILL END AT 9
PM THIS EVENING ALONG WITH RED FLAG WARNINGS FOR PORTIONS OF THE
FIRE WEATHER DISTRICT. PLEASE REFER TO THE FIRE WEATHER DISCUSSION
FOR DETAILS ABOUT THE RED FLAG WARNINGS. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
ON MONDAY DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE FROM
THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING VALLEYS
AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE REGION ON
MONDAY. 88

&&

.FIRE WEATHER...WILL LET THE RED FLAG WARNINGS FOR FIRE ZONES
639...641 AND 643 FOR HOT AND DRY CONDITIONS WITH HIGH HAINES INDEX
EXPIRE AS SCHEDULED AT 9 PM THIS EVENING. WILL CONTINUE THE FIRE
WEATHER WATCH FOR MONDAY AFTERNOON THROUGH TUESDAY EVENING FOR GUSTY
WINDS AND LOW RELATIVE HUMIDITIES FOR FIRE ZONE WA675 (THE KITTITAS
VALLEY). AS COOLER MARINE AIR PUSHES EASTWARD INTO THE DISTRICT
LATER TONIGHT AND ON MONDAY THE HIGH HAINES THREAT WILL DECREASE AND
CRITICAL FIRE CONDITIONS WILL NO LONGER EXIST. HOWEVER GUSTY WINDS
AND LOW RELATIVE HUMIDITIES IN ZONE WA675 MAY CREATE CRITICAL FIRE
CONDITIONS FROM MONDAY AFTERNOON THROUGH TUESDAY. 88

&&

.PREV DISCUSSION... /ISSUED 425 PM PDT SUN AUG 2 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/77/88/88




000
FXUS66 KPDT 030242
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
742 PM PDT SUN AUG 2 2015

.UPDATE...NUMEROUS SHOWERS WITH A FEW EMBEDDED THUNDERSTORMS
CONTINUE WEST OF THE CASCADES AND SOUTH OF THE CWA IN LAKE AND
KLAMATH COUNTIES. MORE SHOWERS ARE ALSO SEEN ON RADAR OVER KITTITAS
COUNTY AND SOME OVER BENTON AND FRANKLIN COUNTIES...BUT IT`S
DOUBTFUL THAT ANY RAIN IS REACHING THE GROUND WITH SUCH HOT AND DRY
AIR AT THE SURFACE IN BENTON AND FRANKLIN COUNTIES. THE UPPER RIDGE
THAT HAS BROUGHT THE VERY HOT AND DRY CONDITIONS DURING THE PAST 4
DAYS WILL MOVE TO THE EAST TONIGHT AND EARLY MONDAY AND ALLOW AN
UPPER TROUGH TO BEGIN MOVING INTO THE REGION. THERE WILL BE
INCREASING SUBTROPICAL MOISTURE AND INSTABILITY TO THE EAST AND
SOUTHEAST OF THIS TROUGH AND AS A RESULT THERE MAY BE SOME
THUNDERSTORMS OVER SOUTHERN AND EASTERN PORTIONS OF THE CWA (MAINLY
FROM THE BLUE MOUNTAINS SOUTHWARD AND EASTWARD) ON MONDAY. ELSEWHERE
TO THE NORTH AND WEST COOLER AND MORE STABLE AIR WILL MOVE INTO
THOSE AREAS. THE BEST CHANCE OF THUNDERSTORMS WILL BE IN CENTRAL
OREGON WHERE THE INSTABILITY AND MOISTURE WILL BE THE GREATEST.
TEMPERATURES ON MONDAY WILL BE ABOUT 8-12 DEGREES COOLER ACROSS THE
CWA...WITH THE GREATEST COOLING OVER NORTHERN AND WESTERN AREAS. THE
COOLING TREND WILL CONTINUE THROUGH MID WEEK WITH DRIER AND MORE
STABLE AIR MOVING INTO THE REGION. THE HEAT ADVISORY WILL END AT 9
PM THIS EVENING ALONG WITH RED FLAG WARNINGS FOR PORTIONS OF THE
FIRE WEATHER DISTRICT. PLEASE REFER TO THE FIRE WEATHER DISCUSSION
FOR DETAILS ABOUT THE RED FLAG WARNINGS. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL PREVAIL DURING THE NEXT
24 HOURS AT ALL TAF SITES. THERE MAY BE BRIEF MVFR AT KBDN AND KRDM
ON MONDAY DUE TO SHOWERS AND THUNDERSTORMS. WINDS WILL INCREASE FROM
THE WEST MAINLY IN THE LOWER COLUMBIA BASIN AND SURROUNDING VALLEYS
AND THE RIDGE TOPS AS COOLER MARINE AIR PUSHES INTO THE REGION ON
MONDAY. 88

&&

.FIRE WEATHER...WILL LET THE RED FLAG WARNINGS FOR FIRE ZONES
639...641 AND 643 FOR HOT AND DRY CONDITIONS WITH HIGH HAINES INDEX
EXPIRE AS SCHEDULED AT 9 PM THIS EVENING. WILL CONTINUE THE FIRE
WEATHER WATCH FOR MONDAY AFTERNOON THROUGH TUESDAY EVENING FOR GUSTY
WINDS AND LOW RELATIVE HUMIDITIES FOR FIRE ZONE WA675 (THE KITTITAS
VALLEY). AS COOLER MARINE AIR PUSHES EASTWARD INTO THE DISTRICT
LATER TONIGHT AND ON MONDAY THE HIGH HAINES THREAT WILL DECREASE AND
CRITICAL FIRE CONDITIONS WILL NO LONGER EXIST. HOWEVER GUSTY WINDS
AND LOW RELATIVE HUMIDITIES IN ZONE WA675 MAY CREATE CRITICAL FIRE
CONDITIONS FROM MONDAY AFTERNOON THROUGH TUESDAY. 88

&&

.PREV DISCUSSION... /ISSUED 425 PM PDT SUN AUG 2 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/77/88/88




000
FXUS66 KPDT 022325 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
425 PM PDT SUN AUG 2 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

&&

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.AVIATION....00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF
SITES OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP
FROM THE SOUTH WILL INCREASE MID AND HIGH CLOUDS OVER THE AREA
TONIGHT AND ESPECIALLY INTO MONDAY. CLOUD BASES WILL START BETWEEN
15-25KFT AGL TONIGHT BEFORE LOWERING TO BETWEEN 07-15KFT AGL AFTER
03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT OR INVOF KBDN AND KRDM
MAINLY FROM 03/08Z THROUGH 03/15-18Z. NORTHWEST WINDS WILL BE BREEZY
AT KDLS...KBDN AND KRDM INTO THE EVENING HOURS...WITH GUSTS BETWEEN
15-25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF
SITES THROUGH MONDAY MORNING. AFTER 03/18Z WESTERLY WINDS WILL AGAIN
INCREASE TO BETWEEN 15-25KTS AT KDLS...KPDT...KALW AND KPSC. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 022325 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
425 PM PDT SUN AUG 2 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

&&

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.AVIATION....00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF
SITES OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP
FROM THE SOUTH WILL INCREASE MID AND HIGH CLOUDS OVER THE AREA
TONIGHT AND ESPECIALLY INTO MONDAY. CLOUD BASES WILL START BETWEEN
15-25KFT AGL TONIGHT BEFORE LOWERING TO BETWEEN 07-15KFT AGL AFTER
03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT OR INVOF KBDN AND KRDM
MAINLY FROM 03/08Z THROUGH 03/15-18Z. NORTHWEST WINDS WILL BE BREEZY
AT KDLS...KBDN AND KRDM INTO THE EVENING HOURS...WITH GUSTS BETWEEN
15-25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF
SITES THROUGH MONDAY MORNING. AFTER 03/18Z WESTERLY WINDS WILL AGAIN
INCREASE TO BETWEEN 15-25KTS AT KDLS...KPDT...KALW AND KPSC. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 022137
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT SUN AUG 2 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

&&

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.AVIATION....PREVIOUS DISCUSSION...18Z TAFS...VFR CONDITIONS WILL
CONTINUE AT ALL TAF SITES OVER THE NEXT 24 HOURS. A SERIES OF
DISTURBANCES MOVING UP FROM THE SOUTH WILL ACT TO INCREASE MID AND
HIGH CLOUDS OVER THE AREA LATER TODAY...TONIGHT AND ESPECIALLY BY
MONDAY MORNING. CLOUD BASES WILL START BETWEEN 15-25KFT AGL TODAY
AND TONIGHT BEFORE LOWERING TO BETWEEN 08-15KFT AGL AFTER 03/15Z. A
FEW SHOWERS WILL BE POSSIBLE AT OR INVOF KBDN...KRDM AND KDLS MAINLY
FROM 03/23Z THROUGH 04/09Z. NORTHWEST WINDS WILL BE INCREASING AT
KDLS...KBDN AND KRDM LATER THIS AFTERNOON AND INTO THE EVENING
HOURS...WITH GUSTS BETWEEN 15-25KTS POSSIBLE HERE. LOOK FOR WINDS
AOB 12KTS AT ALL OTHER TAF SITES THROUGH THE PERIOD. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 022137
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT SUN AUG 2 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. A STRONG HIGH PRESSURE
SYSTEM CONTINUES TO PRODUCE VERY HOT CONDITIONS AS AFTN TEMPS AGAIN
SOAR ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND THE
SURROUNDING AREA. HOWEVER THE HIGH PRESSURE WAS SLIPPING TO THE EAST
AND IS ALLOWING A RETURN FLOW OF MOISTURE INTO OUR WESTERN ZONES
WHERE THE ADDITIONAL CLOUD COVER WAS KEEPING TEMPS FROM RISING AS
FAST TODAY. SHOWERS/TSRA WILL WORK THERE WAY INTO THE WA/OR CASCADES
OVERNIGHT AND THEN SPREAD EASTWARD AFFECTING THE ENTIRE AREA MONDAY
AFTERNOON AS A DISTURBANCE WORKS ITS WAY ACROSS THE REGION. AFTN
HIGH TEMPS WILL BE NOTICEABLE LOWER BY AS MUCH AS FIVE TO TEN
DEGREES BECAUSE OF THE CLOUDS AND SHOWERS INTO MONDAY EVENING. DRIER
AIR IS FORECAST TO WORK ITS WAY INTO OUR WESTERN ZONES MONDAY NIGHT
AND THE BULK OF THE PCPN WILL SHIFT INTO THE BLUE/WALLOWA MOUNTAINS
MONDAY NIGHT AND TUESDAY. MOISTURE WILL ALSO LINGER OVER CENTRAL
OREGON AND A FEW SHOWERS/TSRA ARE POSSIBLE HERE AS WELL TUESDAY
AFTN. AS THE DISTURBANCE MOVES WELL EAST OF THE REGION OUR AREA
SHOULD RETURN TO MOSTLY DRY CONDITIONS AND NEAR SEASONABLE TEMPS BY
MIDWEEK.

&&

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT...THE EXTENDED
PERIOD STARTS OFF MAINLY DRY AS A NORTHWEST FLOW AND WEAK TRANSIENT
UPPER RIDGE DEVELOP OVER THE AREA WEDNESDAY NIGHT THROUGH THE FIRST
HALF OF FRIDAY. WESTERLY WINDS COULD REMAIN A LITTLE BREEZY
WEDNESDAY EVENING AS THE PRESSURE GRADIENT IS SLOW TO RELAX. FRIDAY
NIGHT THROUGH SATURDAY AFTERNOON AN UPPER LEVEL TROUGH PASSES BY
JUST TO THE SOUTH OF THE FORECAST AREA. THIS UPPER LEVEL FEATURE
WILL COMBINE WITH INCREASING MOISTURE AND INSTABILITY TO LEAD TO A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS...ESPECIALLY OVER THE
MOUNTAINS OF CENTRAL AND NORTHEAST OREGON. HEADING INTO SUNDAY AND
SUNDAY NIGHT MOST GUIDANCE IS NOW IN AGREEMENT THAT A BROAD UPPER
TROUGH WITH AN ASSOCIATED UPPER LEVEL LOW WILL BEGIN TO APPROACH THE
REGION FROM OFF THE WASHINGTON COAST. THE EXACT TRACK OF THIS
FEATURE WILL HAVE LARGE IMPLICATIONS ON JUST HOW MUCH MOISTURE MAY
MOVE INTO OUR CWA. THE CURRENT GUIDANCE IS INDICATING PLENTY OF MID
LEVEL MOISTURE...INSTABILITY ALONG WITH A CYCLONIC FLOW AND
INCREASED VERTICAL MOTION OVER THE CWA. THIS WOULD ALLOW SHOWERS AND
THUNDERSTORMS TO DEVELOP OVER MUCH OF THE REGION. WOULD LIKE TO SEE
MORE RUN TO RUN CONSISTENCY IN THIS SOLUTION BEFORE RAISING POPS TOO
MUCH HIGHER...CONSIDERING IT IS DAY 7 DECIDED TO GO WITH A SLIGHT
CHANCE TO LOW END CHANCE OF SHOWERS AND THUNDERSTORMS FOR
NOW...STILL PLENTY OF TIME TO WATCH THIS SYSTEM. WITH THE ADDED
CLOUD COVER AND MOISTURE AROUND TEMPERATURES WILL CONTINUE TO BE
HELD IN CHECK MUCH CLOSER TO AVERAGE LEVELS. THIS EQUATES TO HIGHS
IN THE MID 80S TO LOWER 90S FOR THE LOWER ELEVATIONS THROUGH THE
ENTIRE EXTENDED PERIOD WITH 70S TO LOWER 80S IN THE MOUNTAINS. 77

&&

.AVIATION....PREVIOUS DISCUSSION...18Z TAFS...VFR CONDITIONS WILL
CONTINUE AT ALL TAF SITES OVER THE NEXT 24 HOURS. A SERIES OF
DISTURBANCES MOVING UP FROM THE SOUTH WILL ACT TO INCREASE MID AND
HIGH CLOUDS OVER THE AREA LATER TODAY...TONIGHT AND ESPECIALLY BY
MONDAY MORNING. CLOUD BASES WILL START BETWEEN 15-25KFT AGL TODAY
AND TONIGHT BEFORE LOWERING TO BETWEEN 08-15KFT AGL AFTER 03/15Z. A
FEW SHOWERS WILL BE POSSIBLE AT OR INVOF KBDN...KRDM AND KDLS MAINLY
FROM 03/23Z THROUGH 04/09Z. NORTHWEST WINDS WILL BE INCREASING AT
KDLS...KBDN AND KRDM LATER THIS AFTERNOON AND INTO THE EVENING
HOURS...WITH GUSTS BETWEEN 15-25KTS POSSIBLE HERE. LOOK FOR WINDS
AOB 12KTS AT ALL OTHER TAF SITES THROUGH THE PERIOD. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  69  90  61  92 /  10  20  10  10
ALW  73  92  66  93 /  10  20  10  10
PSC  65  96  65  96 /  10  20  10  10
YKM  69  92  61  89 /  10  10  10   0
HRI  67  94  63  94 /  10  20  10  10
ELN  67  92  61  90 /  10  10  10   0
RDM  59  87  50  87 /  30  30  20  20
LGD  55  85  53  88 /  10  20  30  20
GCD  60  91  54  90 /  10  30  30  20
DLS  70  93  64  91 /  20  30  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     FIRE WEATHER WATCH FROM MONDAY AFTERNOON THROUGH TUESDAY EVENING
     FOR WAZ639-641-675.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 021741 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1020 AM PDT SUN AUG 2 2015

.UPDATE...THE STRONG HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE
AREAS WEATHER WITH THE VERY HOT TEMPERATURES AND DRY CONDITIONS WAS
SLOWLY DRIFTING EAST. THIS WAS ALLOWING FOR A RETURN FLOW OF
MOISTURE INTO PORTIONS THE REGION. MID AND HIGH LEVEL CLOUDS WERE ON
THE INCREASE AND COMBINING THIS WITH DAYTIME HEATING SHOULD MAKE THE
ATMOSPHERE INCREASINGLY UNSTABLE MOSTLY AROUND AND NEAR CENTRAL
OREGON AND THE OREGON CASCADES. ISOLD TSRA ARE POSSIBLE IN THE
AFOREMENTIONED AREAS TODAY AND THIS AREA HAS BEEN EXPANDED IN
COVERAGE AND INTENSITY INTO THIS EVENING WHICH COULD AGGRAVATE THE
ALREADY EXTREME FIRE CONDITIONS.

DESPITE THE ADDITIONAL CLOUD COVER AFTN HIGH TEMPERATURES WILL CLIMB
TOWARD THE CENTURY MARK ONCE AGAIN AND A HEAT ADVISORY REMAINS IN
EFFECT TODAY OVER THE COLUMBIA BASIN AND THE SURROUNDING AREAS.
OTHERWISE THE REMAINDER OF THE FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS OVER THE REGION
TODAY WITH HOT DRY CONDITIONS. HUMIDITIES WILL BE VERY LOW AGAIN
WITH 5-20 PERCENT BY AFTERNOON. MOISTURE MOVING NORTHWARD FROM
CALIFORNIA WILL BRING INCREASING MID AND HIGH LEVEL CLOUDS DURING
THE DAY. ISOLATED SHOWERS AND THUNDERSTORMS POSSIBLE. AN UPPER LEVEL
TROUGH WILL THEN MOVE INTO THE PACIFIC NORTHWEST MONDAY AND TUESDAY.
THIS SYSTEM WILL BRING COOLER TEMPERATURES HIGHER HUMIDITY AND
BREEZY WEST WINDS.  94

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP FROM THE
SOUTH WILL ACT TO INCREASE MID AND HIGH CLOUDS OVER THE AREA LATER
TODAY...TONIGHT AND ESPECIALLY BY MONDAY MORNING. CLOUD BASES WILL
START BETWEEN 15-25KFT AGL TODAY AND TONIGHT BEFORE LOWERING TO
BETWEEN 08-15KFT AGL AFTER 03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT
OR INVOF KBDN...KRDM AND KDLS MAINLY FROM 03/23Z THROUGH 04/09Z.
NORTHWEST WINDS WILL BE INCREASING AT KDLS...KBDN AND KRDM LATER
THIS AFTERNOON AND INTO THE EVENING HOURS...WITH GUSTS BETWEEN 15-
25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF SITES
THROUGH THE PERIOD. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SUN AUG 2 2015/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90

LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  55  88  53 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 102  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/




000
FXUS66 KPDT 021741 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1020 AM PDT SUN AUG 2 2015

.UPDATE...THE STRONG HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE
AREAS WEATHER WITH THE VERY HOT TEMPERATURES AND DRY CONDITIONS WAS
SLOWLY DRIFTING EAST. THIS WAS ALLOWING FOR A RETURN FLOW OF
MOISTURE INTO PORTIONS THE REGION. MID AND HIGH LEVEL CLOUDS WERE ON
THE INCREASE AND COMBINING THIS WITH DAYTIME HEATING SHOULD MAKE THE
ATMOSPHERE INCREASINGLY UNSTABLE MOSTLY AROUND AND NEAR CENTRAL
OREGON AND THE OREGON CASCADES. ISOLD TSRA ARE POSSIBLE IN THE
AFOREMENTIONED AREAS TODAY AND THIS AREA HAS BEEN EXPANDED IN
COVERAGE AND INTENSITY INTO THIS EVENING WHICH COULD AGGRAVATE THE
ALREADY EXTREME FIRE CONDITIONS.

DESPITE THE ADDITIONAL CLOUD COVER AFTN HIGH TEMPERATURES WILL CLIMB
TOWARD THE CENTURY MARK ONCE AGAIN AND A HEAT ADVISORY REMAINS IN
EFFECT TODAY OVER THE COLUMBIA BASIN AND THE SURROUNDING AREAS.
OTHERWISE THE REMAINDER OF THE FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS OVER THE REGION
TODAY WITH HOT DRY CONDITIONS. HUMIDITIES WILL BE VERY LOW AGAIN
WITH 5-20 PERCENT BY AFTERNOON. MOISTURE MOVING NORTHWARD FROM
CALIFORNIA WILL BRING INCREASING MID AND HIGH LEVEL CLOUDS DURING
THE DAY. ISOLATED SHOWERS AND THUNDERSTORMS POSSIBLE. AN UPPER LEVEL
TROUGH WILL THEN MOVE INTO THE PACIFIC NORTHWEST MONDAY AND TUESDAY.
THIS SYSTEM WILL BRING COOLER TEMPERATURES HIGHER HUMIDITY AND
BREEZY WEST WINDS.  94

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP FROM THE
SOUTH WILL ACT TO INCREASE MID AND HIGH CLOUDS OVER THE AREA LATER
TODAY...TONIGHT AND ESPECIALLY BY MONDAY MORNING. CLOUD BASES WILL
START BETWEEN 15-25KFT AGL TODAY AND TONIGHT BEFORE LOWERING TO
BETWEEN 08-15KFT AGL AFTER 03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT
OR INVOF KBDN...KRDM AND KDLS MAINLY FROM 03/23Z THROUGH 04/09Z.
NORTHWEST WINDS WILL BE INCREASING AT KDLS...KBDN AND KRDM LATER
THIS AFTERNOON AND INTO THE EVENING HOURS...WITH GUSTS BETWEEN 15-
25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF SITES
THROUGH THE PERIOD. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SUN AUG 2 2015/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90

LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  55  88  53 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 102  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 021722 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
958 AM PDT SUN AUG 2 2015

.UPDATE...THE STRONG HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE
AREAS WEATHER WITH THE VERY HOT TEMPERATURES AND DRY CONDITIONS WAS
SLOWLY DRIFTING EAST. THIS WAS ALLOWING FOR A RETURN FLOW OF
MOSITURE INTO PORTIONS THE REGION. MID AND HIGH LEVEL CLOUDS WERE ON
THE INCREASE AND COMBINING THIS WITH DAYTIME HEATING SHOULD MAKE THE
ATMOSPHERE INCREASINGLY UNSTABLE MOSTY AROUND AND NEAR CENTRAL
OREGON AND THE OREGON CASCADES. ISOLD TSRA ARE POSSIBLE IN THE
AFORMENTIONED AREAS TODAY AND THIS AREA HAS BEEN EXPANDED IN
COVERAGE AND INTENSITY INTO THIS EVENING WHICH COULD AGGREVATE THE
ALREADY EXTREME FIRE CONDITIONS.

DESPITE THE ADDITIONAL CLOUD COVER AFTN HIGH TEMPERATURES WILL CLIMB
TOWARD THE CENTURY MARK ONCE AGAIN AND A HEAT ADVISORY REMAINS IN
EFFECT TODAY OVER THE COLUMBIA BASIN AND THE SURROUNDING AREAS.
OTHERWISE THE REMAINDER OF THE FORECAST APEPARS ON TRACK FOR NOW.

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP FROM THE
SOUTH WILL ACT TO INCREASE MID AND HIGH CLOUDS OVER THE AREA LATER
TODAY...TONIGHT AND ESPECIALLY BY MONDAY MORNING. CLOUD BASES WILL
START BETWEEN 15-25KFT AGL TODAY AND TONIGHT BEFORE LOWERING TO
BETWEEN 08-15KFT AGL AFTER 03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT
OR INVOF KBDN...KRDM AND KDLS MAINLY FROM 03/23Z THROUGH 04/09Z.
NORTHWEST WINDS WILL BE INCREASING AT KDLS...KBDN AND KRDM LATER
THIS AFTERNOON AND INTO THE EVENING HOURS...WITH GUSTS BETWEEN 15-
25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF SITES
THROUGH THE PERIOD. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SUN AUG 2 2015/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90

LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING. OTHERWISE, WINDS WILL BE LIGHT. POLAN

FIRE WEATHER...AN UPPER LEVEL RIDGE WILL REMAIN CENTERED OVER THE
AREA THROUGH TODAY. THE AIR MASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL BE POOR. HAINES INDEX
VALUES WILL BE 5/6 ON TODAY. THE RED FLAG WARNINGS FOR ZONES 639 AND
640 IN WASHINGTON AND OREGON, AS WELL AS WASHINGTON ZONE 643 WILL
NOW CONTINUE UNTIL 9 PM THIS EVENING. MOISTURE MOVING INTO THE
REGION FROM THE SOUTH WILL BEGIN TO LOWER THE HAINES VALUES LATE
TONIGHT INTO MONDAY. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE AS WELL. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA. THE
POTENTIAL FOR ISSUES WITH LIGHTNING COULD PEAK MONDAY AS WELL.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  55  88  53 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 102  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 021722 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
958 AM PDT SUN AUG 2 2015

.UPDATE...THE STRONG HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE
AREAS WEATHER WITH THE VERY HOT TEMPERATURES AND DRY CONDITIONS WAS
SLOWLY DRIFTING EAST. THIS WAS ALLOWING FOR A RETURN FLOW OF
MOSITURE INTO PORTIONS THE REGION. MID AND HIGH LEVEL CLOUDS WERE ON
THE INCREASE AND COMBINING THIS WITH DAYTIME HEATING SHOULD MAKE THE
ATMOSPHERE INCREASINGLY UNSTABLE MOSTY AROUND AND NEAR CENTRAL
OREGON AND THE OREGON CASCADES. ISOLD TSRA ARE POSSIBLE IN THE
AFORMENTIONED AREAS TODAY AND THIS AREA HAS BEEN EXPANDED IN
COVERAGE AND INTENSITY INTO THIS EVENING WHICH COULD AGGREVATE THE
ALREADY EXTREME FIRE CONDITIONS.

DESPITE THE ADDITIONAL CLOUD COVER AFTN HIGH TEMPERATURES WILL CLIMB
TOWARD THE CENTURY MARK ONCE AGAIN AND A HEAT ADVISORY REMAINS IN
EFFECT TODAY OVER THE COLUMBIA BASIN AND THE SURROUNDING AREAS.
OTHERWISE THE REMAINDER OF THE FORECAST APEPARS ON TRACK FOR NOW.

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP FROM THE
SOUTH WILL ACT TO INCREASE MID AND HIGH CLOUDS OVER THE AREA LATER
TODAY...TONIGHT AND ESPECIALLY BY MONDAY MORNING. CLOUD BASES WILL
START BETWEEN 15-25KFT AGL TODAY AND TONIGHT BEFORE LOWERING TO
BETWEEN 08-15KFT AGL AFTER 03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT
OR INVOF KBDN...KRDM AND KDLS MAINLY FROM 03/23Z THROUGH 04/09Z.
NORTHWEST WINDS WILL BE INCREASING AT KDLS...KBDN AND KRDM LATER
THIS AFTERNOON AND INTO THE EVENING HOURS...WITH GUSTS BETWEEN 15-
25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF SITES
THROUGH THE PERIOD. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SUN AUG 2 2015/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90

LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING. OTHERWISE, WINDS WILL BE LIGHT. POLAN

FIRE WEATHER...AN UPPER LEVEL RIDGE WILL REMAIN CENTERED OVER THE
AREA THROUGH TODAY. THE AIR MASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL BE POOR. HAINES INDEX
VALUES WILL BE 5/6 ON TODAY. THE RED FLAG WARNINGS FOR ZONES 639 AND
640 IN WASHINGTON AND OREGON, AS WELL AS WASHINGTON ZONE 643 WILL
NOW CONTINUE UNTIL 9 PM THIS EVENING. MOISTURE MOVING INTO THE
REGION FROM THE SOUTH WILL BEGIN TO LOWER THE HAINES VALUES LATE
TONIGHT INTO MONDAY. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE AS WELL. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA. THE
POTENTIAL FOR ISSUES WITH LIGHTNING COULD PEAK MONDAY AS WELL.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  55  88  53 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 102  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/




000
FXUS66 KPDT 021722 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
958 AM PDT SUN AUG 2 2015

.UPDATE...THE STRONG HIGH PRESSURE SYSTEM THAT HAS DOMINATED THE
AREAS WEATHER WITH THE VERY HOT TEMPERATURES AND DRY CONDITIONS WAS
SLOWLY DRIFTING EAST. THIS WAS ALLOWING FOR A RETURN FLOW OF
MOSITURE INTO PORTIONS THE REGION. MID AND HIGH LEVEL CLOUDS WERE ON
THE INCREASE AND COMBINING THIS WITH DAYTIME HEATING SHOULD MAKE THE
ATMOSPHERE INCREASINGLY UNSTABLE MOSTY AROUND AND NEAR CENTRAL
OREGON AND THE OREGON CASCADES. ISOLD TSRA ARE POSSIBLE IN THE
AFORMENTIONED AREAS TODAY AND THIS AREA HAS BEEN EXPANDED IN
COVERAGE AND INTENSITY INTO THIS EVENING WHICH COULD AGGREVATE THE
ALREADY EXTREME FIRE CONDITIONS.

DESPITE THE ADDITIONAL CLOUD COVER AFTN HIGH TEMPERATURES WILL CLIMB
TOWARD THE CENTURY MARK ONCE AGAIN AND A HEAT ADVISORY REMAINS IN
EFFECT TODAY OVER THE COLUMBIA BASIN AND THE SURROUNDING AREAS.
OTHERWISE THE REMAINDER OF THE FORECAST APEPARS ON TRACK FOR NOW.

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
OVER THE NEXT 24 HOURS. A SERIES OF DISTURBANCES MOVING UP FROM THE
SOUTH WILL ACT TO INCREASE MID AND HIGH CLOUDS OVER THE AREA LATER
TODAY...TONIGHT AND ESPECIALLY BY MONDAY MORNING. CLOUD BASES WILL
START BETWEEN 15-25KFT AGL TODAY AND TONIGHT BEFORE LOWERING TO
BETWEEN 08-15KFT AGL AFTER 03/15Z. A FEW SHOWERS WILL BE POSSIBLE AT
OR INVOF KBDN...KRDM AND KDLS MAINLY FROM 03/23Z THROUGH 04/09Z.
NORTHWEST WINDS WILL BE INCREASING AT KDLS...KBDN AND KRDM LATER
THIS AFTERNOON AND INTO THE EVENING HOURS...WITH GUSTS BETWEEN 15-
25KTS POSSIBLE HERE. LOOK FOR WINDS AOB 12KTS AT ALL OTHER TAF SITES
THROUGH THE PERIOD. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SUN AUG 2 2015/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90

LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING. OTHERWISE, WINDS WILL BE LIGHT. POLAN

FIRE WEATHER...AN UPPER LEVEL RIDGE WILL REMAIN CENTERED OVER THE
AREA THROUGH TODAY. THE AIR MASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL BE POOR. HAINES INDEX
VALUES WILL BE 5/6 ON TODAY. THE RED FLAG WARNINGS FOR ZONES 639 AND
640 IN WASHINGTON AND OREGON, AS WELL AS WASHINGTON ZONE 643 WILL
NOW CONTINUE UNTIL 9 PM THIS EVENING. MOISTURE MOVING INTO THE
REGION FROM THE SOUTH WILL BEGIN TO LOWER THE HAINES VALUES LATE
TONIGHT INTO MONDAY. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE AS WELL. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA. THE
POTENTIAL FOR ISSUES WITH LIGHTNING COULD PEAK MONDAY AS WELL.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  55  88  53 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 102  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 021000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SUN AUG 2 2015

.SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL HIGH
PRESSURE RIDGE WILL CONTINUE OVER THE REGION TODAY. ALSO SURFACE LOW
PRESSURE WILL BE OVER THE INTERIOR NORTHWEST. AS SUCH HIGH
TEMPERATURES WILL AGAIN BE HOT AT MOST LOCATIONS. VARYING AMOUNTS OF
HIGH LEVEL CLOUDINESS MAY HELP KEEP HIGH TEMPS A DEGREE OR TWO LOWER
THAN THEY MIGHT OTHERWISE REACH. STILL WILL CONTINUE THE EXTENDED
HEAT ADVISORIES. THERE WILL BE SOME INSTABILITY FOR POTENTIAL
THUNDERSTORM DEVELOPMENT, BUT THE UPPER HIGH LOOKS TO CAP MUCH OF
THE AREA. STILL WILL INDICATE ISOLATED STORMS OVER CENTRAL OREGON
EAST TO SOUTHERN GRANT COUNTY THIS AFTERNOON AND EVENING. ALSO A FEW
STORMS MAY PERSIST OVER CENTRAL OREGON OVERNIGHT. A FEW OF THESE MAY
MIGRATE NORTH ALONG THE CASCADE CREST AS WELL. AN UPPER LEVEL TROUGH
OF LOW PRESSURE WILL MOVE INTO BRITISH COLUMBIA MONDAY AND MONDAY
NIGHT. THIS TROUGH WILL SUPPRESS THE RIDGE OVER THE PACIFIC
NORTHWEST WHILE INSTIGATING A PUSH OF COOLER MARINE AIR INTO THE
REGION. THUS WILL SEE HIGH TEMPS MONDAY DROP ANYWHERE FROM 7 TO 12
DEGREES. THIS TROUGH WILL ALSO CAUSE THE DEVELOPMENT OF SOME SHOWERS
AND A FEW THUNDERSTORMS FROM CENTRAL OREGON EAST TO GRANT COUNTY,
AND FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY. ELSEWHERE,
EXPECT GENERALLY DRY CONDITIONS THOUGH A FEW SPRINKLES MAY TRACK
ACROSS THE BASIN WITH AN UPPER WAVE ASSOCIATED WITH THE TROUGH. 90


.LONG TERM...TUESDAY THROUGH SATURDAY...THE MAIN MID/UPPER LEVEL LOW
PRESSURE SYSTEM WILL BE OVER BRITISH COLUMBIA ON TUESDAY. FORECAST
AREA WILL BE ON FAR SOUTHERN FLANK OF THE LOW. AS SUCH WINDS WILL
BE FROM THE WEST-SOUTHWEST YIELDING DOWNSLOPE WINDS EAST OF THE
CASCADES AND THUS DRY AND STABLE CONDITIONS, BUT I KEPT A SLIGHT
CHANCE OF AFTERNOON/EVENING THUNDERSTORMS IN CENTRAL OREGON AND THE
EASTERN OREGON MOUNTAINS BY VIRTUE OF OROGRAPHIC LIFT. A MID/UPPER
LEVEL SHORT WAVE MOVES THROUGH THE BASE OF THE LONG WAVE TROUGH OVER
THE PACIFIC NORTHWEST TUESDAY NIGHT AND WEDNESDAY, THUS BRINGING
DYNAMIC LIFT A SLIGHT CHANCE OF SHOWERS FROM OVERNIGHT THROUGH
WEDNESDAY MORNING IN THE BLUE MOUNTAINS AND A SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON AND EVENING IN THE NORTHERN BLUE
MOUNTAINS. WEDNESDAY NIGHT THROUGH THE REMAINDER OF THE PERIOD ZONAL
WESTERLY FLOW ALOFT PERSISTS OVER THE FORECAST AREA FOR DRY
CONDITIONS. ALTHOUGH FRIDAY AND SATURDAY WE HAVE A SLIGHT CHANCE OF
THUNDERSTORMS MY CONFIDENCE IS NOT HIGH GIVEN THE AFOREMENTIONED
WESTERLY FLOW ALOFT, BUT WILL DEFER TO THE DAY SHIFT TO REMOVE
MENTION OF SLIGHT CHANCE OF THUNDERSTORMS FOR FRIDAY AND SATURDAY.
POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING. OTHERWISE, WINDS WILL BE LIGHT. POLAN

&&

.FIRE WEATHER...AN UPPER LEVEL RIDGE WILL REMAIN CENTERED OVER THE
AREA THROUGH TODAY. THE AIR MASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL BE POOR. HAINES INDEX
VALUES WILL BE 5/6 ON TODAY. THE RED FLAG WARNINGS FOR ZONES 639 AND
640 IN WASHINGTON AND OREGON, AS WELL AS WASHINGTON ZONE 643 WILL
NOW CONTINUE UNTIL 9 PM THIS EVENING. MOISTURE MOVING INTO THE
REGION FROM THE SOUTH WILL BEGIN TO LOWER THE HAINES VALUES LATE
TONIGHT INTO MONDAY. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE AS WELL. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA. THE
POTENTIAL FOR ISSUES WITH LIGHTNING COULD PEAK MONDAY AS WELL.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 102  69  91  61 /   0  10  10  10
ALW 103  72  93  66 /   0  10  10  10
PSC 104  65  97  65 /   0  10  10  10
YKM 100  69  95  61 /   0  10  10  10
HRI 103  67  95  63 /   0  10  10  10
ELN 103  67  94  63 /   0  10  10  10
RDM  99  59  89  50 /  20  20  30  20
LGD  99  53  88  50 /  10  10  20  30
GCD 102  60  92  54 /  10  10  20  30
DLS 103  70  94  64 /  10  10  20  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99/90




000
FXUS66 KPDT 020349
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 PM PDT SAT AUG 1 2015

.UPDATE...HIGH PRESSURE ALOFT WILL REMAIN IN CONTROL OF THE WEATHER
FOR ONE MORE DAY OVER THE REGION WITH VERY HOT AND DRY CONDITIONS.
TEMPERATURES ARE ONCE AGAIN EXPECTED TO REACH AND/OR EXCEED THE
CENTURY MARK FOR THE LOWER COLUMBIA BASIN...NORTHERN BLUE MOUNTAIN
FOOTHILLS AND SURROUNDING VALLEYS. IN THE MOUNTAINS EXPECT VERY WARM
TEMPERATURES IN THE 80S AND 90S. THERE MAY BE SOME MID LEVEL
MOISTURE WORKING ITS WAY NORTHWARD INTO CENTRAL OREGON SUNDAY
AFTERNOON AND EVENING FOR POSSIBLE LATE DAY AND EARLY EVENING
THUNDERSTORMS...WHICH MAY POSSIBLY MOVE NORTH ALONG THE CASCADE EAST
SLOPES. ON MONDAY AN UPPER TROUGH WILL BEGIN TO MOVE INTO THE REGION
BRINGING A COOLING TREND...A BETTER CHANCE OF SHOWERS AND
THUNDERSTORMS ALONG WITH INCREASING WEST TO NORTHWEST WINDS. THIS
WILL CONTINUE THROUGH MUCH OF NEXT WEEK. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING...OTHERWISE WINDS WILL BE LIGHT. 88

&&

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA THROUGH SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR. HAINES
INDEX VALUES WILL BE 5/6 ON SUNDAY. TEMPERATURES WILL BE WELL ABOVE
NORMAL WITH HIGHS IN THE 90S TO NEAR 105. AS SUCH THE RED FLAG
WARNING FOR OREGON/WASHINGTON ZONES 639...640 AND WASHINGTON 643 HAS
BEEN EXTENDED UNTIL 9 PM SUNDAY. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE SUNDAY
AFTERNOON AND EVENING. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA.

&&

.PREV DISCUSSION... /ISSUED 448 PM PDT SAT AUG 1 2015/

SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT SUNDAY FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT SUNDAY FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/77/88/88





000
FXUS66 KPDT 020349
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 PM PDT SAT AUG 1 2015

.UPDATE...HIGH PRESSURE ALOFT WILL REMAIN IN CONTROL OF THE WEATHER
FOR ONE MORE DAY OVER THE REGION WITH VERY HOT AND DRY CONDITIONS.
TEMPERATURES ARE ONCE AGAIN EXPECTED TO REACH AND/OR EXCEED THE
CENTURY MARK FOR THE LOWER COLUMBIA BASIN...NORTHERN BLUE MOUNTAIN
FOOTHILLS AND SURROUNDING VALLEYS. IN THE MOUNTAINS EXPECT VERY WARM
TEMPERATURES IN THE 80S AND 90S. THERE MAY BE SOME MID LEVEL
MOISTURE WORKING ITS WAY NORTHWARD INTO CENTRAL OREGON SUNDAY
AFTERNOON AND EVENING FOR POSSIBLE LATE DAY AND EARLY EVENING
THUNDERSTORMS...WHICH MAY POSSIBLY MOVE NORTH ALONG THE CASCADE EAST
SLOPES. ON MONDAY AN UPPER TROUGH WILL BEGIN TO MOVE INTO THE REGION
BRINGING A COOLING TREND...A BETTER CHANCE OF SHOWERS AND
THUNDERSTORMS ALONG WITH INCREASING WEST TO NORTHWEST WINDS. THIS
WILL CONTINUE THROUGH MUCH OF NEXT WEEK. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS ARE EXPECTED THROUGH THE NEXT
24 HOURS. THERE MAY BE AN INCREASE IN WIND AT KDLS...KRDM AND KBDN
SUNDAY AFTERNOON AND EVENING...OTHERWISE WINDS WILL BE LIGHT. 88

&&

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA THROUGH SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES WILL
REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20 PERCENT
FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR. HAINES
INDEX VALUES WILL BE 5/6 ON SUNDAY. TEMPERATURES WILL BE WELL ABOVE
NORMAL WITH HIGHS IN THE 90S TO NEAR 105. AS SUCH THE RED FLAG
WARNING FOR OREGON/WASHINGTON ZONES 639...640 AND WASHINGTON 643 HAS
BEEN EXTENDED UNTIL 9 PM SUNDAY. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE SUNDAY
AFTERNOON AND EVENING. AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC
NORTHWEST MONDAY WILL START A COOLING TREND WHICH WILL CONTINUE INTO
MID WEEK. HUMIDITIES WILL BEGIN TO RISE. WESTERLY WINDS WILL
INCREASE SOME MONDAY AS THE TROUGH MOVES INTO THE AREA.

&&

.PREV DISCUSSION... /ISSUED 448 PM PDT SAT AUG 1 2015/

SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 9 PM PDT SUNDAY FOR ORZ639-641.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 9 PM PDT SUNDAY FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

88/77/88/88




000
FXUS66 KPDT 012348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
448 PM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.AVIATION...00Z TAFS...VFR CONDITIONS EXPECTED TO PERSIST OVER THE
NEXT 24 HOURS AT ALL TAF SITES. WATCHING FOR A FEW POSSIBLE SHOWERS
INVOF KBDN THROUGH ABOUT 02/04Z...ALTHOUGH MUCH OF THE ACTIVITY
LIKELY STAYS JUST SOUTH. OTHERWISE EXPECT PERIODIC HIGH CLOUDS TO
MOVE THROUGH THE AREA...WITH CLOUD BASES MAINLY BETWEEN 12-25K FT
AGL. COULD SEE ANOTHER SHOWER INVOF KBDN AND KDLS TOMORROW MAINLY
AFTER 02/22Z. WINDS WILL BE LIGHT AOB 12KTS THROUGH THE
PERIOD...EXCEPT AT KDLS...KBDN AND KRDM WHERE NW WIND GUSTS OF 15-20
KTS WILL BE POSSIBLE LATE SUNDAY MORNING AND INTO THE AFTERNOON. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 012348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
448 PM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.AVIATION...00Z TAFS...VFR CONDITIONS EXPECTED TO PERSIST OVER THE
NEXT 24 HOURS AT ALL TAF SITES. WATCHING FOR A FEW POSSIBLE SHOWERS
INVOF KBDN THROUGH ABOUT 02/04Z...ALTHOUGH MUCH OF THE ACTIVITY
LIKELY STAYS JUST SOUTH. OTHERWISE EXPECT PERIODIC HIGH CLOUDS TO
MOVE THROUGH THE AREA...WITH CLOUD BASES MAINLY BETWEEN 12-25K FT
AGL. COULD SEE ANOTHER SHOWER INVOF KBDN AND KDLS TOMORROW MAINLY
AFTER 02/22Z. WINDS WILL BE LIGHT AOB 12KTS THROUGH THE
PERIOD...EXCEPT AT KDLS...KBDN AND KRDM WHERE NW WIND GUSTS OF 15-20
KTS WILL BE POSSIBLE LATE SUNDAY MORNING AND INTO THE AFTERNOON. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 012348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
448 PM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.AVIATION...00Z TAFS...VFR CONDITIONS EXPECTED TO PERSIST OVER THE
NEXT 24 HOURS AT ALL TAF SITES. WATCHING FOR A FEW POSSIBLE SHOWERS
INVOF KBDN THROUGH ABOUT 02/04Z...ALTHOUGH MUCH OF THE ACTIVITY
LIKELY STAYS JUST SOUTH. OTHERWISE EXPECT PERIODIC HIGH CLOUDS TO
MOVE THROUGH THE AREA...WITH CLOUD BASES MAINLY BETWEEN 12-25K FT
AGL. COULD SEE ANOTHER SHOWER INVOF KBDN AND KDLS TOMORROW MAINLY
AFTER 02/22Z. WINDS WILL BE LIGHT AOB 12KTS THROUGH THE
PERIOD...EXCEPT AT KDLS...KBDN AND KRDM WHERE NW WIND GUSTS OF 15-20
KTS WILL BE POSSIBLE LATE SUNDAY MORNING AND INTO THE AFTERNOON. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 012348 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
448 PM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.AVIATION...00Z TAFS...VFR CONDITIONS EXPECTED TO PERSIST OVER THE
NEXT 24 HOURS AT ALL TAF SITES. WATCHING FOR A FEW POSSIBLE SHOWERS
INVOF KBDN THROUGH ABOUT 02/04Z...ALTHOUGH MUCH OF THE ACTIVITY
LIKELY STAYS JUST SOUTH. OTHERWISE EXPECT PERIODIC HIGH CLOUDS TO
MOVE THROUGH THE AREA...WITH CLOUD BASES MAINLY BETWEEN 12-25K FT
AGL. COULD SEE ANOTHER SHOWER INVOF KBDN AND KDLS TOMORROW MAINLY
AFTER 02/22Z. WINDS WILL BE LIGHT AOB 12KTS THROUGH THE
PERIOD...EXCEPT AT KDLS...KBDN AND KRDM WHERE NW WIND GUSTS OF 15-20
KTS WILL BE POSSIBLE LATE SUNDAY MORNING AND INTO THE AFTERNOON. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 012207
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 012207
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 012207
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 012207
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-20
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6...WITH A 5 ON SUNDAY. TEMPERATURES WILL BE
WELL ABOVE NORMAL WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING
INTO THE REGION FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE
THIS AFTERNOON AND EVENING OVER THE SOUTHERN PORTION OF THE
DISTRICT...MAINLY 610 611 640 AND 642. THUNDERSTORM COVERAGE COULD
BE A LITTLE FURTHER NORTH SUNDAY...POSSIBLY UP THE OREGON CASCADES.
AN UPPER LEVEL TROUGH MOVING INTO THE PACIFIC NORTHWEST MONDAY WILL
START A COOLING TREND WHICH WILL CONTINUE INTO MID WEEK. HUMIDITIES
WILL BEGIN TO RISE. WESTERLY WINDS WILL INCREASE SOME MONDAY AS THE
TROUGH MOVES INTO THE AREA.

&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 012137
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
229 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77


&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77




000
FXUS66 KPDT 012137
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
229 PM PDT SAT AUG 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY. HIGH PRESSURE CONTINUES TO
DOMINATE THE AREAS WEATHER WITH DRY CONDITIONS AND ABOVE NORMAL
TEMPS. AFTERNOON HIGHS ARE EXPECTED TO REMAIN AROUND THE CENTURY
MARK INTO SUNDAY AND THE HEAT ADVISORY WILL CONTINUE FOR THE
REMAINDER OF THE WEEKEND MAINLY OVER AND NEAR THE COLUMBIA BASIN.

MEANWHILE MOISTURE WAS MOVING INTO CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WHICH COULD PRODUCE ISOLD TSRA INTO THIS EVENING. AS THE
HIGH PRESSURE SLOWLY SLIPS EAST...ADDITIONAL MOISTURE WILL MOVE
NORTH AND THE AREA OF TSRA WILL EXPAND TO INCLUDE THE WA/OR CASCADES
SUNDAY NIGHT. THIS AREA OF PCPN ARE EXPECTED TO MIGRATE EASTWARD
INTO THE REMAINDER OF OUR AREA MONDAY. AFTN TEMPS WILL ONLY CLIMB
INTO THE 90S ON MONDAY BUT WILL STILL REMAIN ABOVE NORMAL. A WEAK
DISTURBANCE WILL ACCOMPANY THE MOISTURE AND WILL INCREASE PCPN
CHANCES OVER THE JOHN DAY HIGHLANDS ALONG WITH THE BLUE/WALLOWA MTNS
MONDAY NIGHT. AS THE DISTURBANCE AND BULK OF THE MOISTURE DRIFTS
AWAY FROM THE TWO STATE AREA...DRIER CONDITIONS WILL ADVECT INTO THE
REGION ON TUESDAY. HOWEVER LINGERING MOISTURE WILL COMBINE WITH
DAYTIME HEATING TO PRODUCE ISOLD TSRA OVER CENTRAL OREGON AND
BLUE/WALLOWA MTNS TUESDAY AFTN.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NIGHT...THE LONG TERM
STARTS OFF WITH A CHANCE OF LINGERING SHOWERS AND THUNDERSTORMS
MAINLY OVER THE SOUTHERN AND EASTERN MOUNTAINS AS AN UPPER LEVEL
DISTURBANCE MOVES EASTWARD THROUGH THE AREA TUESDAY NIGHT. THE
LATEST GUIDANCE IS NOW IN MUCH BETTER AGREEMENT FOR THE REMAINDER OF
THE EXTENDED PERIOD...WHICH ALLOWS FOR A HIGHER CONFIDENCE FORECAST.
HEADING INTO WEDNESDAY AND THURSDAY A POTENT UPPER TROUGH/LOW IS
FORECAST TO DROP THROUGH CENTRAL B.C. AND INTO SOUTHERN ALBERTA
LEAVING OUR CWA ON THE DRIER SOUTHERN SIDE OF THE SYSTEM UNDER A
WEST TO NORTHWEST FLOW. THEREFORE LOWERED POPS TO SLIGHT CHANCE OR
LESS OVER THE FORECAST AREA DURING THIS TIME...AS MUCH OF THE REGION
IS NOW LOOKING LIKELY TO STAY DRY. CONDITIONS MAY ALSO TURN BREEZY
WEDNESDAY AFTERNOON AND EVENING WITH WESTERLY WINDS BETWEEN 10-20
KTS WITH HIGHER GUSTS POSSIBLE. ON FRIDAY THE LATEST GUIDANCE IS
INDICATING A TRANSIENT UPPER LEVEL RIDGE WORKING ITS WAY THROUGH THE
AREA...HELPING TO CONTINUE THE DRY AND SEASONABLE WEATHER. FRIDAY
NIGHT THROUGH SATURDAY NIGHT AN UPPER LEVEL TROUGH BEGINS TO DEVELOP
OVER THE INTERIOR PACNW...AND THIS COMBINED WITH INCREASING MOISTURE
ON A SOUTHERLY FLOW WILL LEAD TO CHANCES OF SHOWERS AND
THUNDERSTORMS OVER PARTS OF THE REGION.

TEMPERATURES FOR WEDNESDAY THROUGH SATURDAY ARE EXPECTED TO BE MUCH
COOLER THAN WE HAVE BEEN EXPERIENCING RECENTLY...BUT STILL NEAR TO
SLIGHTLY ABOVE AVERAGE EACH DAY. THIS TRANSLATES INTO HIGH
TEMPERATURES IN THE MID 80S TO LOWER 90S IN THE LOWER ELEVATIONS
WITH MAINLY 70S TO LOW 80S IN THE MOUNTAINS. OVERNIGHT LOWS WILL BE
IN THE 50S TO LOWER 60S FOR THE VALLEYS/BASINS WITH 40S IN THE
MOUNTAINS MOST NIGHTS. 77


&&

.PREVIOUS AVIATION DISCUSSION...18Z TAFS...VFR CONDITIONS ARE
EXPECTED AT ALL TAF SITES EXCEPT KPSC THROUGH THE PERIOD. THERE IS
AN AREA OF LOW LEVEL SMOKE MOVING SOUTH AT ABOUT 10 MPH WHICH MAY
AFFECT KPSC BEGINNING AROUND 01/18Z. THIS SMOKE LAYER COULD REDUCE
VIS/CIGS INTO THE MVFR CATEGORY FOR A TIME LATE THIS MORNING AND
INTO THE EARLY AFTERNOON. ONCE THE INVERSION BREAKS THE SMOKE SHOULD
BEGIN TO MIX OUT AND LIFT INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT
NOW THE BEST ESTIMATE FOR THIS TO HAPPEN IS NEAR 01/20Z. AT THE
REMAINING TAF SITES EXPECT JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-
25K FT AGL WITH DIURNAL AND TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER
AT KBDN THERE IS ALSO THE POSSIBILITY FOR A FEW VCSH LATE THIS
AFTERNOON AND EARLY EVENING... VERY SIMILAR TO YESTERDAY AFTERNOON.
77

&&


.PRELIMINARY POINT TEMPS/POPS...
PDT  64 101  69  96 /   0  10  10  20
ALW  70 102  73  95 /   0  10  10  20
PSC  62 104  69  98 /   0   0  10  20
YKM  64 100  68  94 /   0   0   0  20
HRI  62 103  69  96 /   0   0  10  20
ELN  62 101  65  94 /   0   0   0  20
RDM  57  98  59  88 /  10  20  20  30
LGD  55  99  55  90 /  10  10  10  20
GCD  56 101  60  92 /  10  10  20  30
DLS  66 101  71  96 /   0  10  20  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT SUNDAY FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77/77





000
FXUS66 KPDT 011728 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1028 AM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS ARE EXPECTED AT ALL TAF SITES
EXCEPT KPSC THROUGH THE PERIOD. THERE IS AN AREA OF LOW LEVEL SMOKE
MOVING SOUTH AT ABOUT 10 MPH WHICH MAY AFFECT KPSC BEGINNING AROUND
01/18Z. THIS SMOKE LAYER COULD REDUCE VIS/CIGS INTO THE MVFR
CATEGORY FOR A TIME LATE THIS MORNING AND INTO THE EARLY AFTERNOON.
ONCE THE INVERSION BREAKS THE SMOKE SHOULD BEGIN TO MIX OUT AND LIFT
INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT NOW THE BEST ESTIMATE FOR
THIS TO HAPPEN IS NEAR 01/20Z. AT THE REMAINING TAF SITES EXPECT
JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-25K FT AGL WITH DIURNAL AND
TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER AT KBDN THERE IS ALSO THE
POSSIBILITY FOR A FEW VCSH LATE THIS AFTERNOON AND EARLY EVENING...
VERY SIMILAR TO YESTERDAY AFTERNOON. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77





000
FXUS66 KPDT 011728 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1028 AM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS ARE EXPECTED AT ALL TAF SITES
EXCEPT KPSC THROUGH THE PERIOD. THERE IS AN AREA OF LOW LEVEL SMOKE
MOVING SOUTH AT ABOUT 10 MPH WHICH MAY AFFECT KPSC BEGINNING AROUND
01/18Z. THIS SMOKE LAYER COULD REDUCE VIS/CIGS INTO THE MVFR
CATEGORY FOR A TIME LATE THIS MORNING AND INTO THE EARLY AFTERNOON.
ONCE THE INVERSION BREAKS THE SMOKE SHOULD BEGIN TO MIX OUT AND LIFT
INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT NOW THE BEST ESTIMATE FOR
THIS TO HAPPEN IS NEAR 01/20Z. AT THE REMAINING TAF SITES EXPECT
JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-25K FT AGL WITH DIURNAL AND
TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER AT KBDN THERE IS ALSO THE
POSSIBILITY FOR A FEW VCSH LATE THIS AFTERNOON AND EARLY EVENING...
VERY SIMILAR TO YESTERDAY AFTERNOON. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77





000
FXUS66 KPDT 011728 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
1028 AM PDT SAT AUG 1 2015

UPDATED AVIATION DISCUSSION

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS ARE EXPECTED AT ALL TAF SITES
EXCEPT KPSC THROUGH THE PERIOD. THERE IS AN AREA OF LOW LEVEL SMOKE
MOVING SOUTH AT ABOUT 10 MPH WHICH MAY AFFECT KPSC BEGINNING AROUND
01/18Z. THIS SMOKE LAYER COULD REDUCE VIS/CIGS INTO THE MVFR
CATEGORY FOR A TIME LATE THIS MORNING AND INTO THE EARLY AFTERNOON.
ONCE THE INVERSION BREAKS THE SMOKE SHOULD BEGIN TO MIX OUT AND LIFT
INTO A HAZE OR SMOKE ALOFT LAYER...RIGHT NOW THE BEST ESTIMATE FOR
THIS TO HAPPEN IS NEAR 01/20Z. AT THE REMAINING TAF SITES EXPECT
JUST A FEW OR SCT HIGH CLOUDS BETWEEN 15-25K FT AGL WITH DIURNAL AND
TERRAIN DRIVEN WINDS AOB 15KTS. HOWEVER AT KBDN THERE IS ALSO THE
POSSIBILITY FOR A FEW VCSH LATE THIS AFTERNOON AND EARLY EVENING...
VERY SIMILAR TO YESTERDAY AFTERNOON. 77

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/77




000
FXUS66 KPDT 011550 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 011550 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/




000
FXUS66 KPDT 011550 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 011550 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
850 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

.FIRE WEATHER DISCUSSION...UPPER LEVEL RIDGE REMAINS CENTERED OVER
THE AREA TODAY INTO SUNDAY. THE AIRMASS IS VERY DRY AND HUMIDITIES
WILL REMAIN LOW. MINIMUM RH VALUES DURING THE DAY WILL BE 5-15
PERCENT FOR MOST LOCATIONS. RECOVERIES AT NIGHT WILL ALSO BE POOR.
HAINES INDEX TODAY IS 5/6. TEMPERATURES WILL BE WELL ABOVE NORMAL
WITH HIGHS IN THE 90S TO NEAR 105. MOISTURE MOVING INTO THE REGION
FROM THE SOUTH MAY GENERATE A FEW THUNDERSTORMS LATE IN THE DAY OVER
THE SOUTHERN PORTION OF THE DISTRICT...MAINLY 610 611 640 AND 642.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/




000
FXUS66 KPDT 011542 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
829 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

FIRE WEATHER...A NUMBER OF RED FLAG WARNINGS WILL REMAIN IN EFFECT
THROUGH TODAY INTO THIS EVENING. HOT AND DRY CONDITIONS HAVE LED TO
MODERATE TO HIGH HAINES INDEX VALUES AND CRITICAL FIRE WEATHER
CONDITIONS IN PORTIONS OF THE FIRE WEATHER DISTRICT. IN ADDITION
INCREASING WINDS THROUGH THE EASTERN COLUMBIA RIVER GORGE, COMBINED
WITH VERY LOW RELATIVE HUMIDITIES, WILL LEAD TO CRITICAL FIRE
WEATHER CONDITIONS IN THIS AREA. THUNDERSTORM THREAT TODAY LOOKS TO
BE MINIMAL AS STORMS SHOULD BE VERY ISOLATED. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/





000
FXUS66 KPDT 011542 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
829 AM PDT SAT AUG 1 2015

.UPDATE...STRONG HIGH PRESSURE HAS A FIRM GRIP ON THE PACNW AND THE
HOT TEMPERATURES WILL PERSIST TODAY. AFTN TEMPS WILL ONCE AGAIN
CLIMB ABOVE THE CENTURY MARK ACROSS PORTIONS OF THE BASIN AND
SURROUNDING AREA AND A HEAT ADVISORY REMAINS IN EFFECT OVER PORTIONS
OF THE AREA. MEANWHILE SOME MOISTURE WAS WORKING ITS WAY NORTH AND
IS EXPECTED TO MOVE INTO PORTIONS OF CENTRAL OREGON AND THE JOHN DAY
HIGHLANDS WITH A FEW TSRA POSSIBLE LATER TODAY. IN ADDITION THE
VISIBLE SATL WAS INDICATING SOME SMOKE THAT IS DRIFTING INTO OUR
WASHINGTON ZONES THIS MORNING AND THE BENTON/FRANKLIN ZONES WERE
UPDATED TO REFLECT THIS. OTHERWISE CRITICAL FIRE CONDITIONS PERSIST
WITH MULTIPLE RED FLAG WARNINGS IN EFFECT TODAY AND THE PRESENT
SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT SAT AUG 1 2015/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

FIRE WEATHER...A NUMBER OF RED FLAG WARNINGS WILL REMAIN IN EFFECT
THROUGH TODAY INTO THIS EVENING. HOT AND DRY CONDITIONS HAVE LED TO
MODERATE TO HIGH HAINES INDEX VALUES AND CRITICAL FIRE WEATHER
CONDITIONS IN PORTIONS OF THE FIRE WEATHER DISTRICT. IN ADDITION
INCREASING WINDS THROUGH THE EASTERN COLUMBIA RIVER GORGE, COMBINED
WITH VERY LOW RELATIVE HUMIDITIES, WILL LEAD TO CRITICAL FIRE
WEATHER CONDITIONS IN THIS AREA. THUNDERSTORM THREAT TODAY LOOKS TO
BE MINIMAL AS STORMS SHOULD BE VERY ISOLATED. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 104  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 106  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

97/




000
FXUS66 KPDT 011425 CCA
AFDPDT

AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SAT AUG 1 2015

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

.LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.FIRE WEATHER...A NUMBER OF RED FLAG WARNINGS WILL REMAIN IN EFFECT
THROUGH TODAY INTO THIS EVENING. HOT AND DRY CONDITIONS HAVE LED TO
MODERATE TO HIGH HAINES INDEX VALUES AND CRITICAL FIRE WEATHER
CONDITIONS IN PORTIONS OF THE FIRE WEATHER DISTRICT. IN ADDITION
INCREASING WINDS THROUGH THE EASTERN COLUMBIA RIVER GORGE, COMBINED
WITH VERY LOW RELATIVE HUMIDITIES, WILL LEAD TO CRITICAL FIRE
WEATHER CONDITIONS IN THIS AREA. THUNDERSTORM THREAT TODAY LOOKS TO
BE MINIMAL AS STORMS SHOULD BE VERY ISOLATED. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 103  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 105  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99





000
FXUS66 KPDT 011012
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SAT AUG 1 2015

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

.LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.FIRE WEATHER...A NUMBER OF RED FLAG WARNINGS WILL REMAIN IN EFFECT
THROUGH TODAY INTO THIS EVENING. HOT AND DRY CONDITIONS HAVE LED TO
MODERATE TO HIGH HAINES INDEX VALUES AND CRITICAL FIRE WEATHER
CONDITIONS IN PORTIONS OF THE FIRE WEATHER DISTRICT. IN ADDITION
INCREASING WINDS THROUGH THE EASTERN COLUMBIA RIVER GORGE, COMBINED
WITH VERY LOW RELATIVE HUMIDITIES, WILL LEAD TO CRITICAL FIRE
WEATHER CONDITIONS IN THIS AREA. THUNDERSTORM THREAT TODAY LOOKS TO
BE MINIMAL AS STORMS SHOULD BE VERY ISOLATED. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 103  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 105  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99




000
FXUS66 KPDT 011012
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SAT AUG 1 2015

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...AN UPPER LEVEL RIDGE OF
HIGH PRESSURE WILL PERSIST OVER THE REGION THROUGH THIS PERIOD.
HEIGHTS WILL GRADUALLY LOWER SUNDAY AND SUNDAY NIGHT AS THE RIDGE
WEAKENS DUE TO AN APPROACHING LOW PRESSURE TROUGH. THE UPPER FLOW
OVER CENTRAL AND EAST CENTRAL OREGON TODAY WILL ALLOW SUBTROPICAL
MOISTURE TO CONTINUE TO WORK INTO THIS AREA. DAYTIME HEATING WILL BE
EXCELLENT AGAIN, RESULTING IN SOME DIURNALLY INDUCED INSTABILITY.
THUS WILL INDICATE SOME LOW END CHANCES OF SHOWERS AND/OR
THUNDERSTORMS OVER OUR SOUTHERN MOST AREAS. WEST FLOW OVER MUCH OF
THE REMAINDER OF OUR AREA WILL KEEP CONDITIONS DRY. THE FLOW WILL
BECOME MORE SOUTHERLY ACROSS THE PACIFIC NORTHWEST SUNDAY. THUS WILL
SEE THE SUBTROPICAL MOISTURE BEGIN TO WORK INTO THE REMAINDER OF
NORTHEAST OREGON AND SOUTHEAST WASHINGTON. INSTABILITY AND FORCING
REMAINS WEAK SUNDAY AFTERNOON AND SUNDAY NIGHT. THUS WILL CONTINUE
TO INDICATE ONLY SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS OVER
PORTIONS OF CENTRAL, EAST CENTRAL AND NORTHEAST OREGON FOR THIS TIME
PERIOD. HIGH TEMPS WILL REMAIN HOT ACROSS THE AREA AND WILL CONTINUE
THE CURRENT HEAT ADVISORIES THROUGH TODAY. THESE ADVISORIES MAY NEED
TO BE EXTENDED INTO SUNDAY FOR A FEW ZONES. 90

.LONG TERM...MONDAY THROUGH FRIDAY NIGHT...ON THE SYNOPTIC SCALE, A
SLOW MOVING MID/UPPER LEVEL TROUGH WILL BE OVER BRITISH COLUMBIA
MONDAY AS A MID/UPPER LEVEL SHORT WAVE ASSOCIATED DYNAMIC LIFT MOVES
NORTHEAST FROM CENTRAL OREGON BEGINNING AROUND DAYBREAK MONDAY TO
NORTHEAST OREGON THUS YIELDING ISOLATED THUNDERSTORMS MONDAY MORNING
THROUGH MONDAY EVENING ACROSS HIGHER TERRAIN IN EASTERN OREGON.
OVERNIGHT INTO TUESDAY MORNING THE MID/UPPER LEVEL SHORT WAVE EXITS
FORECAST AREA, BUT HELD ON TO SLIGHT CHANCE OF THUNDERSTORMS FOR
EASTERN MOUNTAINS OF OREGON THROUGH TUESDAY AFTERNOON/EVENING TO
ACCOUNT FOR DAYTIME SURFACE HEATING YIELDING MARGINAL INSTABILITY
OVER MOUNTAINS IN GRANT COUNTY AND THE BLUE MOUNTAINS TO IDAHO.
UPPER TROUGH MOVES OVER REGION ON WEDNESDAY AND THURSDAY FOR A
SLIGHT CHANCE OF THUNDERSTORMS IN THE BLUE MOUNTAINS. FRIDAY LOOKS
TO BE DRY BY VIRTUE OF WESTERLY FLOW ALOFT OVER REGION. POLAN

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WITH LIGHT WINDS ARE EXPECTED
FOR THE NEXT 24 HOURS. WINDS WILL INCREASE THIS AFTERNOON TO 10-20
KTS.  POLAN

&&

.FIRE WEATHER...A NUMBER OF RED FLAG WARNINGS WILL REMAIN IN EFFECT
THROUGH TODAY INTO THIS EVENING. HOT AND DRY CONDITIONS HAVE LED TO
MODERATE TO HIGH HAINES INDEX VALUES AND CRITICAL FIRE WEATHER
CONDITIONS IN PORTIONS OF THE FIRE WEATHER DISTRICT. IN ADDITION
INCREASING WINDS THROUGH THE EASTERN COLUMBIA RIVER GORGE, COMBINED
WITH VERY LOW RELATIVE HUMIDITIES, WILL LEAD TO CRITICAL FIRE
WEATHER CONDITIONS IN THIS AREA. THUNDERSTORM THREAT TODAY LOOKS TO
BE MINIMAL AS STORMS SHOULD BE VERY ISOLATED. 90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT 103  64 101  69 /   0   0  10  10
ALW 104  70 102  73 /   0   0  10  10
PSC 106  62 104  69 /   0   0   0  10
YKM 102  64 100  68 /   0   0   0   0
HRI 105  62 103  69 /   0   0   0  10
ELN 103  62 101  65 /   0   0   0   0
RDM 101  57  98  59 /  10  10  20  20
LGD  99  55  97  55 /  10  10  10  10
GCD 102  56 100  60 /  10  10  20  20
DLS 105  66 101  71 /   0   0  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR ORZ639-640-642.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR ORZ041-044-507.

WA...RED FLAG WARNING UNTIL 10 PM PDT THIS EVENING FOR WAZ639-641-643.

     HEAT ADVISORY UNTIL 9 PM PDT THIS EVENING FOR WAZ024-027>029.

&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

90/99/99





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