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000
FXUS66 KPDT 022125
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
225 PM PDT MON MAY 2 2016

.SHORT TERM...TONIGHT THROUGH THURSDAY. LARGE UPPER LEVEL TROUGH
IS SLOWLY APPROACHING THE WEST COAST. THE FLOW ALOFT HAS TURNED
SOUTHERLY TODAY WITH INCREASED INSTABILITY. VISIBLE SATELLITE
SHOWING CUMULUS DEVELOPING OVER THE MOUNTAINS. EXPECT THIS WILL
CONTINUE THROUGH THE AFTERNOON INTO EARLY EVENING. MODELS STILL
INDICATE SCATTERED SHOWERS OR THUNDERSTORMS OVER THE OREGON
CASCADES LATE TODAY MOVING NORTHWARD AND DISSIPATING OVERNIGHT.
REMAINDER OF THE FORECAST AREA WILL BE CLEAR TO PARTLY CLOUDY. THE
UPPER TROUGH AND COLD FRONT WILL BE ALONG THE PACIFIC NORTHWEST
COAST TUESDAY. INSTABILITY AND MOISTURE WILL BE INCREASING. EXPECT
WE WILL HAVE A LITTLE MORE SHOWER AND THUNDERSTORMS ACTIVITY
ACROSS THE REGION DURING THE AFTERNOON AND EVENING. ANOTHER WARM
DAY WITH HIGHS IN THE 70S TO MID 80S. BY WEDNESDAY THE TROUGH
BEGINS MOVING INLAND AND THE COLD FRONT WILL BE CROSSING THE AREA.
MORE WIDESPREAD SHOWERS AND THUNDERSTORMS ARE LIKELY. THE UPPER
LOW BECOMES NEARLY STATIONARY OVER CALIFORNIA AND SOUTHERLY FLOW
ALOFT CONTINUES INTO THURSDAY. MODELS CONTINUE TO INDICATE SHOWERS
AND THUNDERSTORMS LIKELY AS THE FORECAST AREA WILL BE IN A
FAVORABLE LOCATION NORTH OF THE LOW. WITH THE SLOW MOVEMENT OF
THIS SYSTEM THERE IS A POSSIBILITY OF SOME HEAVIER RAINFALL
AMOUNTS WED AND THU. TEMPERATURES WILL ALSO BE MUCH COOLER THESE
DAYS. 94

.LONG TERM...THURSDAY NIGHT THROUGH MONDAY...A CLOSED LOW WILL
DRIFT EAST ACROSS THE SOUTHEASTERN US THURSDAY THROUGH SATURDAY.
EXPECT SHOWERS TO PERSIST OVER THE EASTERN WASHINGTON AND OREGON
THURSDAY EVENING...THEN DECREASE AS THE LOW MOVES FARTHER AWAY FROM
THE AREA FRIDAY. THUNDERSTORMS COVERAGE SHOULD BE LIMITED TO THE
MOST UNSTABLE LOCATION/TIMES...CENTRAL TO NORTHEAST OREGON DURING
THE AFTERNOON/EVENING THURSDAY AND FRIDAY. FRIDAY NIGHT THROUGH
SATURDAY AN UPPER LEVEL RIDGE WILL BUILD OVER WASHINGTON.
HOWEVER...EASTERLY FLOW AROUND THE LOW IN CALIFORNIA MAY KEEP
SHOWERS ALONG THE SOUTHERN EDGE OF THE CWA WHILE DRIER CONDITIONS
SPREAD INTO EASTERN WASHINGTON. SOME MODELS CONTINUE TO SPIN
MOISTURE INTO CENTRAL AND NORTHEAST OREGON...BUT OTHERS KEEP THE
MOISTURE FAR ENOUGH SOUTH TO SUGGEST IT MAY DRY OUT IN NORTHEAST
OREGON SATURDAY. BY SUNDAY AND MONDAY THE GFS ENSEMBLE MODELS SHOW
SIGNIFICANT DIFFERENCES WITH THE LOCATION OF THE LOW VARYING FROM
ARIZONA TO MONTANA. WITH LITTLE CONFIDENCE IN ANY SPECIFIC SOLUTION
I KEPT THE SAME GENERAL TREND OF DRYING OUT THE CWA DUE TO THE LOW
MOVING AWAY AND RIDGING DEVELOPING OFFSHORE. COONFIELD

&&

.AVIATION...0Z TAFS...VFR CONDITIONS WILL PREVAIL FOR THE NEXT 21
HOURS AT ALL TAF SITES. THERE WILL BE SOME CUMULUS BUILD UPS THIS
AFTERNOON MAINLY IMPACTING KRDM AND KBDN WITH A SLIGHT CHANCE OF
THUNDERSTORMS NEAR THE CASCADE MOUNTAINS. INCREASING MID/HIGH CLOUDS
TOMORROW. A SLIGHT CHANCE OF THUNDERSTORMS AT ALL TAF SITES
TOMORROW AFTER 21Z WITH MVFR CIGS/VSBY POSSIBLE. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  82  51  75 /  10  10  20  40
ALW  50  83  54  76 /   0  10  10  40
PSC  47  86  54  79 /   0  10  20  30
YKM  47  82  53  75 /   0  20  30  50
HRI  46  85  53  77 /   0  10  20  40
ELN  44  79  53  72 /   0  20  30  50
RDM  41  78  47  67 /  20  30  40  60
LGD  40  78  47  74 /   0  10  20  40
GCD  39  79  45  72 /  10  20  30  60
DLS  51  78  55  72 /  10  30  40  50

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94/76/76





000
FXUS66 KPDT 021721 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1021 AM PDT MON MAY 2 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...UPPER LEVEL HIGH PRESSURE WILL MAINTAIN FAIR WEATHER
ACROSS THE FORECAST AREA THIS MORNING WITH SUNNY SKIES. MEANWHILE
AN UPPER LEVEL TROUGH IS APPROACHING THE WEST COAST. THE FLOW
ALOFT IS BECOMING MORE SOUTHERLY AND THIS WILL RESULT IN SOME WEAK
INSTABILITY THIS AFTERNOON. WILL LIKELY HAVE SCATTERED CUMULUS
DEVELOPING OVER THE MOUNTAINS. ISOLATED SHOWERS AND THUNDERSTORMS
MAY DEVELOP OVER THE OREGON CASCADES LATE IN THE DAY. WARMER TEMPS
WITH HIGHS IN THE MID 70S TO MID 80S.

&&

.PREV DISCUSSION... /ISSUED 432 AM PDT MON MAY 2 2016/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24
HOURS AT ALL TAF SITES. THERE WILL BE SOME CUMULUS BUILD UPS THIS
AFTERNOON MAINLY IMPACTING KRDM AND KBDN WITH A SLIGHT CHANCE OF
THUNDERSTORMS NEAR THE CASCADE MOUNTAINS. INCREASING MID/HIGH CLOUDS
TOMORROW.  76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94





000
FXUS66 KPDT 021514
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
814 AM PDT MON MAY 2 2016

.SHORT TERM...UPPER LEVEL HIGH PRESSURE WILL MAINTAIN FAIR WEATHER
ACROSS THE FORECAST AREA THIS MORNING WITH SUNNY SKIES. MEANWHILE
AN UPPER LEVEL TROUGH IS APPROACHING THE WEST COAST. THE FLOW
ALOFT IS BECOMING MORE SOUTHERLY AND THIS WILL RESULT IN SOME WEAK
INSTABILITY THIS AFTERNOON. WILL LIKELY HAVE SCATTERED CUMULUS
DEVELOPING OVER THE MOUNTAINS. ISOLATED SHOWERS AND THUNDERSTORMS
MAY DEVELOP OVER THE OREGON CASCADES LATE IN THE DAY. WARMER TEMPS
WITH HIGHS IN THE MID 70S TO MID 80S.

&&

.PREV DISCUSSION... /ISSUED 432 AM PDT MON MAY 2 2016/

SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

AVIATION...12Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. THERE WILL BE SOME
CUMULUS BUILD UPS THIS AFTERNOON MAINLY IMPACTING KRDM AND KBDN WITH
A SLIGHT CHANCE OF THUNDERSTORMS NEAR THE CASCADE MOUNTAINS. WINDS
WILL GENERALLY BE LESS THAN 10 KTS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94





000
FXUS66 KPDT 021132 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
432 AM PDT MON MAY 2 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. THERE WILL BE SOME
CUMULUS BUILD UPS THIS AFTERNOON MAINLY IMPACTING KRDM AND KBDN WITH
A SLIGHT CHANCE OF THUNDERSTORMS NEAR THE CASCADE MOUNTAINS. WINDS
WILL GENERALLY BE LESS THAN 10 KTS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 021132 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
432 AM PDT MON MAY 2 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. THERE WILL BE SOME
CUMULUS BUILD UPS THIS AFTERNOON MAINLY IMPACTING KRDM AND KBDN WITH
A SLIGHT CHANCE OF THUNDERSTORMS NEAR THE CASCADE MOUNTAINS. WINDS
WILL GENERALLY BE LESS THAN 10 KTS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 020950
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
249 AM PDT MON MAY 2 2016

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...VFR CONDITIONS WITH
MOSTLY CLEAR SKIES WILL PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF
SITES. THERE WILL BE SOME CUMULUS BUILD UPS MONDAY AFTERNOON MAINLY
IMPACTING KRDM AND KBDN WITH A SLIGHT CHANCE OF THUNDERSTORMS NEAR
THE CASCADE MOUNTAINS. WINDS WILL GENERALLY BE LESS THAN 10 KTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 020950
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
249 AM PDT MON MAY 2 2016

.SHORT TERM...TODAY THROUGH TUESDAY NIGHT...THE UPPER RIDGE OVER THE
PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST
TODAY AND TONIGHT. THIS WILL RESULT IN THE DEVELOPMENT OF A SOUTH
FLOW FROM CENTRAL OREGON NORTH TO CENTRAL WASHINGTON THIS AFTERNOON.
MOISTURE WILL INCREASE IN THESE AREAS THIS AFTERNOON AND TONIGHT.
INSTABILITY DUE TO DAYTIME HEATING WILL BECOME SUFFICIENT ENOUGH TO
CAUSE A FEW AFTERNOON AND EVENING SHOWERS AND/OR THUNDERSTORMS OVER
PORTIONS OF CENTRAL OREGON, ESPECIALLY THE CASCADE EAST SLOPES. WEAK
WAVES WITHIN THE SOUTHERLY FLOW WILL KEEP A FEW SHOWERS GOING
OVERNIGHT INTO TUESDAY MORNING OVER PORTIONS OF CENTRAL AND NORTH
CENTRAL OREGON, AND SOUTH CENTRAL WASHINGTON. NORTHEAST OREGON AND
SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY
MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED
WITH THE UPPER RIDGE. HIGH TEMPS TODAY WILL BE 3 TO 5 DEGREES WARMER
THAN ON SUNDAY. THE SOUTH FLOW WILL EXTEND EAST ACROSS THE REMAINDER
OF NORTHEAST OREGON AND SOUTHEAST WASHINGTON TUESDAY AFTERNOON AND
TUESDAY NIGHT. AFTERNOON HEATING AND ENERGY ASSOCIATED WITH AN
APPROACHING UPPER TROUGH OFF THE COAST WILL CAUSE CHANCES OF SHOWERS
AND THUNDERSTORMS ACROSS A GOOD PORTION OF THE AREA TUESDAY
AFTERNOON AND EVENING. VARYING CHANCES OF SHOWERS WILL CONTINUE LATE
TUESDAY NIGHT INTO EARLY WEDNESDAY DUE TO LINGERING ENERGY AND
MOISTURE. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...SHOWERS AND THUNDERSTORMS
WILL CONTINUE OVER THE FORECAST AREA WEDNESDAY AND THURSDAY...AS
MOISTURE CONTINUES TO BE SPUN UP FROM A LOW PRESSURE SYSTEM OFF THE
CALIFORNIA COAST. THIS LOW WILL SLOWLY MOVE TOWARDS SOUTHERN NEVADA
BY THE END OF THE WORK WEEK. IT IS THEN EXPECTED TO STALL OUT OVER
THE WEEKEND. THIS COULD MAKE FOR A TRICKY POP FORECAST FRIDAY
ONWARD...AS THE POSITION OF THE LOW COULD DETERMINE WHETHER WE GET
SEVERAL DAYS OF SHOWERS AND POSSIBLE THUNDERSTORMS...VERSUS SEVERAL
DAYS OF DRY WEATHER. FOR NOW HAVE KEPT MAINLY A SLIGHT CHANCE OVER
THE CENTRAL AND NORTHEAST OREGON AREAS. TEMPERATURES WILL CONTINUE
TO BE IN THE 70S TO LOWER 80S FOR THE LOWER ELEVATIONS...AND IN THE
60S TO LOWER 70S MOUNTAINS. CONTINUE TO MONITOR THE FORECAST AS WE
APPROACH THE NEAR TERM FOR THE WEEKEND...AND CONFIDENCE WILL
INCREASE ON OUR POP FORECAST. WEBER

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...VFR CONDITIONS WITH
MOSTLY CLEAR SKIES WILL PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF
SITES. THERE WILL BE SOME CUMULUS BUILD UPS MONDAY AFTERNOON MAINLY
IMPACTING KRDM AND KBDN WITH A SLIGHT CHANCE OF THUNDERSTORMS NEAR
THE CASCADE MOUNTAINS. WINDS WILL GENERALLY BE LESS THAN 10 KTS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  81  49  84  53 /   0  10  10  20
ALW  80  53  84  56 /   0   0  10  10
PSC  85  48  88  54 /   0   0  10  20
YKM  84  48  84  54 /   0  10  20  30
HRI  85  47  87  53 /   0   0  10  20
ELN  83  45  81  55 /   0   0  20  30
RDM  78  42  76  46 /  10  20  30  40
LGD  75  41  80  48 /   0  10  10  20
GCD  78  43  80  48 /   0  10  20  30
DLS  86  53  79  56 /   0  20  30  40

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 020510
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1010 PM PDT SUN MAY 1 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT AND MONDAY...HIGH PRESSURE WILL CONTINUE OVER
THE REGION WITH THIS AFTERNOONS CUMULUS CLOUDS OVER THE MOUNTAINS
BEGINNING TO DIMINISH. INCREASING SOUTHERLY FLOW WILL BRING SOME
MOISTURE INTO CENTRAL OREGON LATE MONDAY FOR A CHANCE OF
THUNDERSTORMS AND SHOWERS. TEMPERATURES WILL INCREASE SLIGHTLY ON
MONDAY FOR ANOTHER ABOVE NORMAL TEMPERATURE DAY. JUST MINOR CHANGES
MADE IN THE EVENING FORECAST UPDATE.

.AVIATION...06Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. THERE WILL BE SOME
CUMULUS BUILD UPS MONDAY AFTERNOON MAINLY IMPACTING KRDM AND KBDN
WITH A SLIGHT CHANCE OF THUNDERSTORMS NEAR THE CASCADE MOUNTAINS.
WINDS WILL GENERALLY BE LESS THAN 10 KTS.

&&

.PREV DISCUSSION... /ISSUED 213 PM PDT SUN MAY 1 2016/

SHORT TERM...TONIGHT THROUGH WEDNESDAY. WEAK INSTABILITY OVER THE
REGION DUE TO AN UPPER LOW WELL TO THE SOUTH. SATELLITE SHOWING
SCATTERED CUMULUS DEVELOPING OVER THE MOUNTAINS. THIS WILL LIKELY
CONTINUE THROUGH SUNSET THEN DIMINISH. OTHERWISE UPPER LEVEL RIDGE
WILL PROVIDE MAINLY CLEAR SKIES OVERNIGHT INTO MONDAY MORNING.
LOWS TONIGHT ON THE COOL SIDE WITH MID 30S TO MID 40S. AN UPPER
LEVEL TROUGH WILL BE APPROACHING THE WEST COAST MONDAY. SOUTHERLY
FLOW ALOFT WILL DEVELOP WITH AN INCREASE IN INSTABILITY. EXPECT
SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
MODELS CONTINUE TO INDICATE A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVER THE OREGON CASCADES LATE AFTERNOON INTO THE
EVENING. WARMER TOMORROW WITH HIGHS IN THE MID 70S TO MID 80S. BY
TUESDAY THE TROUGH AXIS AND COLD FRONT WILL BE ALONG THE COAST.
ADDITIONAL INSTABILITY AND MOISTURE SHOULD RESULT IN A BETTER
CHANCE OF SHOWERS AND THUNDERSTORMS ESPECIALLY BY AFTERNOON AND
EVENING. ON WEDNESDAY THE TROUGH AND COLD FRONT ARE MOVING THROUGH
THE FORECAST AREA WITH SHOWERS AND THUNDERSTORMS LIKELY. MODELS
ARE INDICATING THE POSSIBILITY OF A LARGE AREA OF STRATIFORM RAIN
DURING THE DAY. IF THIS WERE TO DEVELOP IT WOULD LIKELY DIMINISH
THE THREAT OF THUNDERSTORMS DUE TO HEAVIER CLOUD COVER AND COOLER
TEMPS. 94

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...WEDNESDAY AN
OFFSHORE TROUGH WILL BE SPLITTING AS AN ELONGATED FRONT SLOWLY
CROSSES THE CASCADES. SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
EASTERN WASHINGTON AND OREGON IN THE MOIST AND UNSTABLE SOUTHERLY
FLOW AHEAD OF THIS SYSTEM. INSTABILITY WILL DECREASE WITH THE LOSS
OF DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE DURING THE
EVENING. A CLOSED LOW WILL DEVELOP IN THE SOUTHERN HALF OF THE
TROUGH AND DRIFT SOUTHEAST ACROSS CALIFORNIA THURSDAY AND FRIDAY.
EXPECT SHOWERS TO PERSIST OVER THE AREA WITH THE BROAD TROUGH BUT
THUNDERSTORMS COVERAGE SHOULD BE LIMITED TO THE MOST UNSTABLE
LOCATION/TIMES...CENTRAL TO NORTHEAST OREGON DURING THE AFTERNOON
AND EVENING. FRIDAY AFTERNOON THROUGH SATURDAY A RIDGE WILL BUILD
OVER WASHINGTON. HOWEVER...SOUTHEAST FLOW AROUND THE LOW IN
CALIFORNIA MAY KEEP SHOWERS FROM CENTRAL TO NORTHEAST OREGON WHILE
DRIER CONDITIONS SPREAD INTO EASTERN WASHINGTON. SOME MODELS
CONTINUE TO SPIN MOISTURE INTO CENTRAL AND NORTHEAST OREGON
SUNDAY...BUT OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST IT
MAY DRY OUT IN NORTHEAST OREGON SATURDAY NIGHT OR SUNDAY. COONFIELD



&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  80  47  81 /   0   0  10  10
ALW  47  80  50  81 /   0   0  10  10
PSC  45  84  46  83 /   0   0  10  10
YKM  46  84  48  79 /   0   0  10  20
HRI  44  83  45  83 /   0   0  10  10
ELN  43  82  46  77 /   0   0  10  20
RDM  35  79  43  75 /   0  10  20  30
LGD  41  76  42  76 /   0   0  10  10
GCD  40  76  40  76 /   0   0  10  20
DLS  46  86  52  76 /   0   0  10  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

91/91/91





000
FXUS66 KPDT 020220
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
720 PM PDT SUN MAY 1 2016

.SHORT TERM...TONIGHT AND MONDAY...HIGH PRESSURE WILL CONTINUE OVER
THE REGION WITH THIS AFTERNOONS CUMULUS CLOUDS OVER THE MOUNTAINS
BEGINNING TO DIMINISH. INCREASING SOUTHERLY FLOW WILL BRING SOME
MOISTURE INTO CENTRAL OREGON LATE MONDAY FOR A CHANCE OF
THUNDERSTORMS AND SHOWERS. TEMPERATURES WILL INCREASE SLIGHTLY ON
MONDAY FOR ANOTHER ABOVE NORMAL TEMPERATURE DAY. JUST MINOR CHANGES
MADE IN THE EVENING FORECAST UPDATE.


&&

.PREV DISCUSSION... /ISSUED 213 PM PDT SUN MAY 1 2016/

SHORT TERM...TONIGHT THROUGH WEDNESDAY. WEAK INSTABILITY OVER THE
REGION DUE TO AN UPPER LOW WELL TO THE SOUTH. SATELLITE SHOWING
SCATTERED CUMULUS DEVELOPING OVER THE MOUNTAINS. THIS WILL LIKELY
CONTINUE THROUGH SUNSET THEN DIMINISH. OTHERWISE UPPER LEVEL RIDGE
WILL PROVIDE MAINLY CLEAR SKIES OVERNIGHT INTO MONDAY MORNING.
LOWS TONIGHT ON THE COOL SIDE WITH MID 30S TO MID 40S. AN UPPER
LEVEL TROUGH WILL BE APPROACHING THE WEST COAST MONDAY. SOUTHERLY
FLOW ALOFT WILL DEVELOP WITH AN INCREASE IN INSTABILITY. EXPECT
SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
MODELS CONTINUE TO INDICATE A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVER THE OREGON CASCADES LATE AFTERNOON INTO THE
EVENING. WARMER TOMORROW WITH HIGHS IN THE MID 70S TO MID 80S. BY
TUESDAY THE TROUGH AXIS AND COLD FRONT WILL BE ALONG THE COAST.
ADDITIONAL INSTABILITY AND MOISTURE SHOULD RESULT IN A BETTER
CHANCE OF SHOWERS AND THUNDERSTORMS ESPECIALLY BY AFTERNOON AND
EVENING. ON WEDNESDAY THE TROUGH AND COLD FRONT ARE MOVING THROUGH
THE FORECAST AREA WITH SHOWERS AND THUNDERSTORMS LIKELY. MODELS
ARE INDICATING THE POSSIBILITY OF A LARGE AREA OF STRATIFORM RAIN
DURING THE DAY. IF THIS WERE TO DEVELOP IT WOULD LIKELY DIMINISH
THE THREAT OF THUNDERSTORMS DUE TO HEAVIER CLOUD COVER AND COOLER
TEMPS. 94

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...WEDNESDAY AN
OFFSHORE TROUGH WILL BE SPLITTING AS AN ELONGATED FRONT SLOWLY
CROSSES THE CASCADES. SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
EASTERN WASHINGTON AND OREGON IN THE MOIST AND UNSTABLE SOUTHERLY
FLOW AHEAD OF THIS SYSTEM. INSTABILITY WILL DECREASE WITH THE LOSS
OF DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE DURING THE
EVENING. A CLOSED LOW WILL DEVELOP IN THE SOUTHERN HALF OF THE
TROUGH AND DRIFT SOUTHEAST ACROSS CALIFORNIA THURSDAY AND FRIDAY.
EXPECT SHOWERS TO PERSIST OVER THE AREA WITH THE BROAD TROUGH BUT
THUNDERSTORMS COVERAGE SHOULD BE LIMITED TO THE MOST UNSTABLE
LOCATION/TIMES...CENTRAL TO NORTHEAST OREGON DURING THE AFTERNOON
AND EVENING. FRIDAY AFTERNOON THROUGH SATURDAY A RIDGE WILL BUILD
OVER WASHINGTON. HOWEVER...SOUTHEAST FLOW AROUND THE LOW IN
CALIFORNIA MAY KEEP SHOWERS FROM CENTRAL TO NORTHEAST OREGON WHILE
DRIER CONDITIONS SPREAD INTO EASTERN WASHINGTON. SOME MODELS
CONTINUE TO SPIN MOISTURE INTO CENTRAL AND NORTHEAST OREGON
SUNDAY...BUT OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST IT
MAY DRY OUT IN NORTHEAST OREGON SATURDAY NIGHT OR SUNDAY. COONFIELD

AVIATION...0Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. WINDS WILL GENERALLY
BE LESS THAN 10 KTS. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  80  47  81 /   0   0  10  10
ALW  47  80  50  81 /   0   0  10  10
PSC  45  84  46  83 /   0   0  10  10
YKM  46  84  48  79 /   0   0  10  20
HRI  44  83  45  83 /   0   0  10  10
ELN  43  82  46  77 /   0   0  10  20
RDM  35  79  43  75 /   0  10  20  30
LGD  41  76  42  76 /   0   0  10  10
GCD  40  76  40  76 /   0   0  10  20
DLS  46  86  52  76 /   0   0  10  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

91/91/91





000
FXUS66 KPDT 012113
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
213 PM PDT SUN MAY 1 2016

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. WEAK INSTABILITY OVER THE
REGION DUE TO AN UPPER LOW WELL TO THE SOUTH. SATELLITE SHOWING
SCATTERED CUMULUS DEVELOPING OVER THE MOUNTAINS. THIS WILL LIKELY
CONTINUE THROUGH SUNSET THEN DIMINISH. OTHERWISE UPPER LEVEL RIDGE
WILL PROVIDE MAINLY CLEAR SKIES OVERNIGHT INTO MONDAY MORNING.
LOWS TONIGHT ON THE COOL SIDE WITH MID 30S TO MID 40S. AN UPPER
LEVEL TROUGH WILL BE APPROACHING THE WEST COAST MONDAY. SOUTHERLY
FLOW ALOFT WILL DEVELOP WITH AN INCREASE IN INSTABILITY. EXPECT
SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
MODELS CONTINUE TO INDICATE A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVER THE OREGON CASCADES LATE AFTERNOON INTO THE
EVENING. WARMER TOMORROW WITH HIGHS IN THE MID 70S TO MID 80S. BY
TUESDAY THE TROUGH AXIS AND COLD FRONT WILL BE ALONG THE COAST.
ADDITIONAL INSTABILITY AND MOISTURE SHOULD RESULT IN A BETTER
CHANCE OF SHOWERS AND THUNDERSTORMS ESPECIALLY BY AFTERNOON AND
EVENING. ON WEDNESDAY THE TROUGH AND COLD FRONT ARE MOVING THROUGH
THE FORECAST AREA WITH SHOWERS AND THUNDERSTORMS LIKELY. MODELS
ARE INDICATING THE POSSIBILITY OF A LARGE AREA OF STRATIFORM RAIN
DURING THE DAY. IF THIS WERE TO DEVELOP IT WOULD LIKELY DIMINISH
THE THREAT OF THUNDERSTORMS DUE TO HEAVIER CLOUD COVER AND COOLER
TEMPS. 94

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...WEDNESDAY AN
OFFSHORE TROUGH WILL BE SPLITTING AS AN ELONGATED FRONT SLOWLY
CROSSES THE CASCADES. SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
EASTERN WASHINGTON AND OREGON IN THE MOIST AND UNSTABLE SOUTHERLY
FLOW AHEAD OF THIS SYSTEM. INSTABILITY WILL DECREASE WITH THE LOSS
OF DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE DURING THE
EVENING. A CLOSED LOW WILL DEVELOP IN THE SOUTHERN HALF OF THE
TROUGH AND DRIFT SOUTHEAST ACROSS CALIFORNIA THURSDAY AND FRIDAY.
EXPECT SHOWERS TO PERSIST OVER THE AREA WITH THE BROAD TROUGH BUT
THUNDERSTORMS COVERAGE SHOULD BE LIMITED TO THE MOST UNSTABLE
LOCATION/TIMES...CENTRAL TO NORTHEAST OREGON DURING THE AFTERNOON
AND EVENING. FRIDAY AFTERNOON THROUGH SATURDAY A RIDGE WILL BUILD
OVER WASHINGTON. HOWEVER...SOUTHEAST FLOW AROUND THE LOW IN
CALIFORNIA MAY KEEP SHOWERS FROM CENTRAL TO NORTHEAST OREGON WHILE
DRIER CONDITIONS SPREAD INTO EASTERN WASHINGTON. SOME MODELS
CONTINUE TO SPIN MOISTURE INTO CENTRAL AND NORTHEAST OREGON
SUNDAY...BUT OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST IT
MAY DRY OUT IN NORTHEAST OREGON SATURDAY NIGHT OR SUNDAY. COONFIELD

&&

.AVIATION...0Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. WINDS WILL GENERALLY
BE LESS THAN 10 KTS. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  45  80  47  81 /   0   0  10  10
ALW  48  81  50  81 /   0   0  10  10
PSC  43  84  46  83 /   0   0  10  10
YKM  43  83  48  79 /   0   0  10  20
HRI  42  84  45  83 /   0   0  10  10
ELN  42  82  46  77 /   0   0  10  20
RDM  37  79  43  75 /   0  10  20  30
LGD  39  75  42  76 /   0   0  10  10
GCD  36  77  40  76 /   0   0  10  20
DLS  46  85  52  76 /   0   0  10  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

94/76/76





000
FXUS66 KPDT 012113
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
213 PM PDT SUN MAY 1 2016

.SHORT TERM...TONIGHT THROUGH WEDNESDAY. WEAK INSTABILITY OVER THE
REGION DUE TO AN UPPER LOW WELL TO THE SOUTH. SATELLITE SHOWING
SCATTERED CUMULUS DEVELOPING OVER THE MOUNTAINS. THIS WILL LIKELY
CONTINUE THROUGH SUNSET THEN DIMINISH. OTHERWISE UPPER LEVEL RIDGE
WILL PROVIDE MAINLY CLEAR SKIES OVERNIGHT INTO MONDAY MORNING.
LOWS TONIGHT ON THE COOL SIDE WITH MID 30S TO MID 40S. AN UPPER
LEVEL TROUGH WILL BE APPROACHING THE WEST COAST MONDAY. SOUTHERLY
FLOW ALOFT WILL DEVELOP WITH AN INCREASE IN INSTABILITY. EXPECT
SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
MODELS CONTINUE TO INDICATE A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVER THE OREGON CASCADES LATE AFTERNOON INTO THE
EVENING. WARMER TOMORROW WITH HIGHS IN THE MID 70S TO MID 80S. BY
TUESDAY THE TROUGH AXIS AND COLD FRONT WILL BE ALONG THE COAST.
ADDITIONAL INSTABILITY AND MOISTURE SHOULD RESULT IN A BETTER
CHANCE OF SHOWERS AND THUNDERSTORMS ESPECIALLY BY AFTERNOON AND
EVENING. ON WEDNESDAY THE TROUGH AND COLD FRONT ARE MOVING THROUGH
THE FORECAST AREA WITH SHOWERS AND THUNDERSTORMS LIKELY. MODELS
ARE INDICATING THE POSSIBILITY OF A LARGE AREA OF STRATIFORM RAIN
DURING THE DAY. IF THIS WERE TO DEVELOP IT WOULD LIKELY DIMINISH
THE THREAT OF THUNDERSTORMS DUE TO HEAVIER CLOUD COVER AND COOLER
TEMPS. 94

.LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...WEDNESDAY AN
OFFSHORE TROUGH WILL BE SPLITTING AS AN ELONGATED FRONT SLOWLY
CROSSES THE CASCADES. SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
EASTERN WASHINGTON AND OREGON IN THE MOIST AND UNSTABLE SOUTHERLY
FLOW AHEAD OF THIS SYSTEM. INSTABILITY WILL DECREASE WITH THE LOSS
OF DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE DURING THE
EVENING. A CLOSED LOW WILL DEVELOP IN THE SOUTHERN HALF OF THE
TROUGH AND DRIFT SOUTHEAST ACROSS CALIFORNIA THURSDAY AND FRIDAY.
EXPECT SHOWERS TO PERSIST OVER THE AREA WITH THE BROAD TROUGH BUT
THUNDERSTORMS COVERAGE SHOULD BE LIMITED TO THE MOST UNSTABLE
LOCATION/TIMES...CENTRAL TO NORTHEAST OREGON DURING THE AFTERNOON
AND EVENING. FRIDAY AFTERNOON THROUGH SATURDAY A RIDGE WILL BUILD
OVER WASHINGTON. HOWEVER...SOUTHEAST FLOW AROUND THE LOW IN
CALIFORNIA MAY KEEP SHOWERS FROM CENTRAL TO NORTHEAST OREGON WHILE
DRIER CONDITIONS SPREAD INTO EASTERN WASHINGTON. SOME MODELS
CONTINUE TO SPIN MOISTURE INTO CENTRAL AND NORTHEAST OREGON
SUNDAY...BUT OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST IT
MAY DRY OUT IN NORTHEAST OREGON SATURDAY NIGHT OR SUNDAY. COONFIELD

&&

.AVIATION...0Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. WINDS WILL GENERALLY
BE LESS THAN 10 KTS. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  45  80  47  81 /   0   0  10  10
ALW  48  81  50  81 /   0   0  10  10
PSC  43  84  46  83 /   0   0  10  10
YKM  43  83  48  79 /   0   0  10  20
HRI  42  84  45  83 /   0   0  10  10
ELN  42  82  46  77 /   0   0  10  20
RDM  37  79  43  75 /   0  10  20  30
LGD  39  75  42  76 /   0   0  10  10
GCD  36  77  40  76 /   0   0  10  20
DLS  46  85  52  76 /   0   0  10  30

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

94/76/76





000
FXUS66 KPDT 011725 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1025 AM PDT SUN MAY 1 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...UPPER RIDGE BUILDING INTO THE REGION TODAY
WITH MOSTLY SUNNY SKIES AND WARMER TEMPERATURES. SATELLITE
INDICATES A FEW CLOUDS WILL MOVE ACROSS CENTRAL OREGON THIS
AFTERNOON AND EVENING. THE RIDGE WILL MOVE TO THE EAST MONDAY AS
AN UPPER LEVEL TROUGH APPROACHES THE WEST COAST. EXPECT ANOTHER
MOSTLY SUNNY AND WARM DAY. INSTABILITY WILL BE INCREASING IN
RESPONSE TO THE UPPER TROUGH AND SOUTHERLY FLOW ALOFT. WILL LIKELY
SEE SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
A SLIGHT CHANCE OF LATE AFTERNOON AND EVENING THUNDERSTORMS OVER
THE OREGON CASCADES.  94

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. WINDS WILL GENERALLY
BE LESS THAN 10 KTS. 76

&&

.PREV DISCUSSION... /ISSUED 437 AM PDT SUN MAY 1 2016/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL RIDGE WILL
BUILD OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA TODAY. THIS
RIDGE WILL REMAIN OVER THE REGION THROUGH MONDAY, THOUGH THE RIDGE
AXIS WILL BEGIN TO SHIFT EAST MONDAY. AS SUCH WILL SEE FAIR AND DRY
CONDITIONS TODAY THROUGH MONDAY MORNING. TEMPS TODAY WILL BE WARM
WITH HIGHS IN THE 70S AT LOWER ELEVATIONS AND 60S IN THE MOUNTAINS.
THIS HEATING WILL CAUSE SOME WEAK SURFACE BASED INSTABILITY THAT
WILL CAUSE AFTERNOON AND EARLY EVENING CONVECTIVE CLOUDS OVER THE
HIGHER TERRAIN. MEANWHILE STRONG SUBSIDENCE ALOFT WILL KEEP THESE
CLOUDS SHALLOW AND FLAT. WINDS WILL BE GENERALLY FROM THE NORTH AND
NORTHEAST WITH SPEEDS UP TO 15 MPH. WITH THE RIDGE AXIS SHIFTING
EAST MONDAY INTO MONDAY NIGHT, WILL START TO SEE THE DEVELOPMENT OF
A MOIST SOUTHERLY FLOW OVER OUR WESTERN MOST ZONES. AS SUCH WILL SEE
A FEW SHOWERS OVER THE CASCADE EAST SLOPES MONDAY AFTERNOON AND
MONDAY NIGHT. ALSO THERE WILL BE THE POSSIBILITY OF A FEW
THUNDERSTORMS LATE MONDAY AFTERNOON AND MONDAY EVENING OVER THE
OREGON CASCADE EAST SLOPES. ELSEWHERE SUBSIDENCE ALOFT WILL REMAIN
STRONG AND THE AIR MASS WILL STILL BE RELATIVELY DRY. HIGH TEMPS
WILL BE A FEW DEGREES WARMER. 90

LONG TERM...TUESDAY THROUGH SATURDAY...MODELS ARE IN PRETTY
GOOD AGREEMENT FOR THE NEAR TERM BUT WILL BEGIN TO DIVERGE LATE IN
THE WEEK. HIGH PRESSURE CONTINUES TO SHIFT EAST AS A LOW DEEPENS OFF
THE OR/WA COAST.  MOIST UNSTABLE CONDITIONS CAN BE EXPECTED...ACROSS
CENTRAL OREGON AND THE OR/WA CASCADE EAST SLOPES ON TUESDAY
AFTERNOON. HAVE KEPT A SLIGHT CHANCE OF THUNDERSTORMS ACROSS
NORTHEAST OREGON...BUT MODELS SEEM TO BE HINTING AT A SLOWER
PROGRESSION OF THE MOISTURE...SUGGESTING LOWER PROBABILITIES OF
THUNDERSTORMS ACROSS NORTHEAST OREGON...BUT FOR NOW WILL KEEP IT AS
SLIGHT CHANCE. WEDNESDAY THE LOW IS EXPECTED TO BE JUST OFF THE
SOUTHERN OR/NORTHERN CA COAST. THIS WILL PROVIDE A GOOD UNSTABLE
SETUP FOR MOST OF THE FORECAST AREA...THUSLY THUNDERSTORMS WILL BE
IN THE FORECAST FOR ALL AREAS WEDNESDAY AFTERNOON AND EVENING.

TEMPERATURES WILL COOL OFF A BIT AS WE HEAD TOWARD THE END OF THE
WORK WEEK...BUT ARE STILL EXPECTED TO BE SLIGHTLY ABOVE NORMAL. THE
REST OF THE EXTENDED HAS BEEN LEFT AS IS...WITH MAINLY CHANCE POPS
OVER THE MOUNTAINS AND SLIGHT CHANCE OVER THE LOWER ELEVATIONS. AS
THE LOW CONTINUES TO DIVE SOUTH TOWARDS SOUTHERN NEVADA...MODELS
DIVERGE IN THEIR SOLUTIONS.  SOME MODELS CONTINUE TO SPIN MOISTURE
UP INTO THE DEFORMATION ZONE...MAINLY CENTRAL AND NORTHEAST OREGON.
OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST A DRY END OF
THE WORK WEEK.  WILL HAVE TO FINE TUNE THIS AS THIS SYSTEM
APPROACHES THE NEAR TERM. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  75  46  81  48 /   0   0   0  10
ALW  75  50  81  54 /   0   0   0  10
PSC  79  45  84  49 /   0   0   0  10
YKM  80  45  84  48 /   0   0   0  10
HRI  79  42  84  46 /   0   0   0  10
ELN  79  43  84  46 /   0   0   0  10
RDM  73  37  79  42 /   0   0  10  20
LGD  70  40  75  42 /   0   0   0  10
GCD  73  39  79  43 /   0   0   0  10
DLS  81  47  87  52 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

94





000
FXUS66 KPDT 011725 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1025 AM PDT SUN MAY 1 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...UPPER RIDGE BUILDING INTO THE REGION TODAY
WITH MOSTLY SUNNY SKIES AND WARMER TEMPERATURES. SATELLITE
INDICATES A FEW CLOUDS WILL MOVE ACROSS CENTRAL OREGON THIS
AFTERNOON AND EVENING. THE RIDGE WILL MOVE TO THE EAST MONDAY AS
AN UPPER LEVEL TROUGH APPROACHES THE WEST COAST. EXPECT ANOTHER
MOSTLY SUNNY AND WARM DAY. INSTABILITY WILL BE INCREASING IN
RESPONSE TO THE UPPER TROUGH AND SOUTHERLY FLOW ALOFT. WILL LIKELY
SEE SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
A SLIGHT CHANCE OF LATE AFTERNOON AND EVENING THUNDERSTORMS OVER
THE OREGON CASCADES.  94

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES. WINDS WILL GENERALLY
BE LESS THAN 10 KTS. 76

&&

.PREV DISCUSSION... /ISSUED 437 AM PDT SUN MAY 1 2016/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL RIDGE WILL
BUILD OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA TODAY. THIS
RIDGE WILL REMAIN OVER THE REGION THROUGH MONDAY, THOUGH THE RIDGE
AXIS WILL BEGIN TO SHIFT EAST MONDAY. AS SUCH WILL SEE FAIR AND DRY
CONDITIONS TODAY THROUGH MONDAY MORNING. TEMPS TODAY WILL BE WARM
WITH HIGHS IN THE 70S AT LOWER ELEVATIONS AND 60S IN THE MOUNTAINS.
THIS HEATING WILL CAUSE SOME WEAK SURFACE BASED INSTABILITY THAT
WILL CAUSE AFTERNOON AND EARLY EVENING CONVECTIVE CLOUDS OVER THE
HIGHER TERRAIN. MEANWHILE STRONG SUBSIDENCE ALOFT WILL KEEP THESE
CLOUDS SHALLOW AND FLAT. WINDS WILL BE GENERALLY FROM THE NORTH AND
NORTHEAST WITH SPEEDS UP TO 15 MPH. WITH THE RIDGE AXIS SHIFTING
EAST MONDAY INTO MONDAY NIGHT, WILL START TO SEE THE DEVELOPMENT OF
A MOIST SOUTHERLY FLOW OVER OUR WESTERN MOST ZONES. AS SUCH WILL SEE
A FEW SHOWERS OVER THE CASCADE EAST SLOPES MONDAY AFTERNOON AND
MONDAY NIGHT. ALSO THERE WILL BE THE POSSIBILITY OF A FEW
THUNDERSTORMS LATE MONDAY AFTERNOON AND MONDAY EVENING OVER THE
OREGON CASCADE EAST SLOPES. ELSEWHERE SUBSIDENCE ALOFT WILL REMAIN
STRONG AND THE AIR MASS WILL STILL BE RELATIVELY DRY. HIGH TEMPS
WILL BE A FEW DEGREES WARMER. 90

LONG TERM...TUESDAY THROUGH SATURDAY...MODELS ARE IN PRETTY
GOOD AGREEMENT FOR THE NEAR TERM BUT WILL BEGIN TO DIVERGE LATE IN
THE WEEK. HIGH PRESSURE CONTINUES TO SHIFT EAST AS A LOW DEEPENS OFF
THE OR/WA COAST.  MOIST UNSTABLE CONDITIONS CAN BE EXPECTED...ACROSS
CENTRAL OREGON AND THE OR/WA CASCADE EAST SLOPES ON TUESDAY
AFTERNOON. HAVE KEPT A SLIGHT CHANCE OF THUNDERSTORMS ACROSS
NORTHEAST OREGON...BUT MODELS SEEM TO BE HINTING AT A SLOWER
PROGRESSION OF THE MOISTURE...SUGGESTING LOWER PROBABILITIES OF
THUNDERSTORMS ACROSS NORTHEAST OREGON...BUT FOR NOW WILL KEEP IT AS
SLIGHT CHANCE. WEDNESDAY THE LOW IS EXPECTED TO BE JUST OFF THE
SOUTHERN OR/NORTHERN CA COAST. THIS WILL PROVIDE A GOOD UNSTABLE
SETUP FOR MOST OF THE FORECAST AREA...THUSLY THUNDERSTORMS WILL BE
IN THE FORECAST FOR ALL AREAS WEDNESDAY AFTERNOON AND EVENING.

TEMPERATURES WILL COOL OFF A BIT AS WE HEAD TOWARD THE END OF THE
WORK WEEK...BUT ARE STILL EXPECTED TO BE SLIGHTLY ABOVE NORMAL. THE
REST OF THE EXTENDED HAS BEEN LEFT AS IS...WITH MAINLY CHANCE POPS
OVER THE MOUNTAINS AND SLIGHT CHANCE OVER THE LOWER ELEVATIONS. AS
THE LOW CONTINUES TO DIVE SOUTH TOWARDS SOUTHERN NEVADA...MODELS
DIVERGE IN THEIR SOLUTIONS.  SOME MODELS CONTINUE TO SPIN MOISTURE
UP INTO THE DEFORMATION ZONE...MAINLY CENTRAL AND NORTHEAST OREGON.
OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST A DRY END OF
THE WORK WEEK.  WILL HAVE TO FINE TUNE THIS AS THIS SYSTEM
APPROACHES THE NEAR TERM. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  75  46  81  48 /   0   0   0  10
ALW  75  50  81  54 /   0   0   0  10
PSC  79  45  84  49 /   0   0   0  10
YKM  80  45  84  48 /   0   0   0  10
HRI  79  42  84  46 /   0   0   0  10
ELN  79  43  84  46 /   0   0   0  10
RDM  73  37  79  42 /   0   0  10  20
LGD  70  40  75  42 /   0   0   0  10
GCD  73  39  79  43 /   0   0   0  10
DLS  81  47  87  52 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

94





000
FXUS66 KPDT 011503
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
803 AM PDT SUN MAY 1 2016

.SHORT TERM...UPPER RIDGE BUILDING INTO THE REGION TODAY
WITH MOSTLY SUNNY SKIES AND WARMER TEMPERATURES. SATELLITE
INDICATES A FEW CLOUDS WILL MOVE ACROSS CENTRAL OREGON THIS
AFTERNOON AND EVENING. THE RIDGE WILL MOVE TO THE EAST MONDAY AS
AN UPPER LEVEL TROUGH APPROACHES THE WEST COAST. EXPECT ANOTHER
MOSTLY SUNNY AND WARM DAY. INSTABILITY WILL BE INCREASING IN
RESPONSE TO THE UPPER TROUGH AND SOUTHERLY FLOW ALOFT. WILL LIKELY
SEE SOME CUMULUS DEVELOPMENT OVER THE MOUNTAINS IN THE AFTERNOON.
A SLIGHT CHANCE OF LATE AFTERNOON AND EVENING THUNDERSTORMS OVER
THE OREGON CASCADES.  94

&&

.PREV DISCUSSION... /ISSUED 437 AM PDT SUN MAY 1 2016/

SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL RIDGE WILL
BUILD OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA TODAY. THIS
RIDGE WILL REMAIN OVER THE REGION THROUGH MONDAY, THOUGH THE RIDGE
AXIS WILL BEGIN TO SHIFT EAST MONDAY. AS SUCH WILL SEE FAIR AND DRY
CONDITIONS TODAY THROUGH MONDAY MORNING. TEMPS TODAY WILL BE WARM
WITH HIGHS IN THE 70S AT LOWER ELEVATIONS AND 60S IN THE MOUNTAINS.
THIS HEATING WILL CAUSE SOME WEAK SURFACE BASED INSTABILITY THAT
WILL CAUSE AFTERNOON AND EARLY EVENING CONVECTIVE CLOUDS OVER THE
HIGHER TERRAIN. MEANWHILE STRONG SUBSIDENCE ALOFT WILL KEEP THESE
CLOUDS SHALLOW AND FLAT. WINDS WILL BE GENERALLY FROM THE NORTH AND
NORTHEAST WITH SPEEDS UP TO 15 MPH. WITH THE RIDGE AXIS SHIFTING
EAST MONDAY INTO MONDAY NIGHT, WILL START TO SEE THE DEVELOPMENT OF
A MOIST SOUTHERLY FLOW OVER OUR WESTERN MOST ZONES. AS SUCH WILL SEE
A FEW SHOWERS OVER THE CASCADE EAST SLOPES MONDAY AFTERNOON AND
MONDAY NIGHT. ALSO THERE WILL BE THE POSSIBILITY OF A FEW
THUNDERSTORMS LATE MONDAY AFTERNOON AND MONDAY EVENING OVER THE
OREGON CASCADE EAST SLOPES. ELSEWHERE SUBSIDENCE ALOFT WILL REMAIN
STRONG AND THE AIR MASS WILL STILL BE RELATIVELY DRY. HIGH TEMPS
WILL BE A FEW DEGREES WARMER. 90

LONG TERM...TUESDAY THROUGH SATURDAY...MODELS ARE IN PRETTY
GOOD AGREEMENT FOR THE NEAR TERM BUT WILL BEGIN TO DIVERGE LATE IN
THE WEEK. HIGH PRESSURE CONTINUES TO SHIFT EAST AS A LOW DEEPENS OFF
THE OR/WA COAST.  MOIST UNSTABLE CONDITIONS CAN BE EXPECTED...ACROSS
CENTRAL OREGON AND THE OR/WA CASCADE EAST SLOPES ON TUESDAY
AFTERNOON. HAVE KEPT A SLIGHT CHANCE OF THUNDERSTORMS ACROSS
NORTHEAST OREGON...BUT MODELS SEEM TO BE HINTING AT A SLOWER
PROGRESSION OF THE MOISTURE...SUGGESTING LOWER PROBABILITIES OF
THUNDERSTORMS ACROSS NORTHEAST OREGON...BUT FOR NOW WILL KEEP IT AS
SLIGHT CHANCE. WEDNESDAY THE LOW IS EXPECTED TO BE JUST OFF THE
SOUTHERN OR/NORTHERN CA COAST. THIS WILL PROVIDE A GOOD UNSTABLE
SETUP FOR MOST OF THE FORECAST AREA...THUSLY THUNDERSTORMS WILL BE
IN THE FORECAST FOR ALL AREAS WEDNESDAY AFTERNOON AND EVENING.

TEMPERATURES WILL COOL OFF A BIT AS WE HEAD TOWARD THE END OF THE
WORK WEEK...BUT ARE STILL EXPECTED TO BE SLIGHTLY ABOVE NORMAL. THE
REST OF THE EXTENDED HAS BEEN LEFT AS IS...WITH MAINLY CHANCE POPS
OVER THE MOUNTAINS AND SLIGHT CHANCE OVER THE LOWER ELEVATIONS. AS
THE LOW CONTINUES TO DIVE SOUTH TOWARDS SOUTHERN NEVADA...MODELS
DIVERGE IN THEIR SOLUTIONS.  SOME MODELS CONTINUE TO SPIN MOISTURE
UP INTO THE DEFORMATION ZONE...MAINLY CENTRAL AND NORTHEAST OREGON.
OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST A DRY END OF
THE WORK WEEK.  WILL HAVE TO FINE TUNE THIS AS THIS SYSTEM
APPROACHES THE NEAR TERM. WEBER

AVIATION...12Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITE. WINDS WILL
GENERALLY BE LESS THAN 10 KTS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  75  46  81  48 /   0   0   0  10
ALW  75  50  81  54 /   0   0   0  10
PSC  79  45  84  49 /   0   0   0  10
YKM  80  45  84  48 /   0   0   0  10
HRI  79  42  84  46 /   0   0   0  10
ELN  79  43  84  46 /   0   0   0  10
RDM  73  37  79  42 /   0   0  10  20
LGD  70  40  75  42 /   0   0   0  10
GCD  73  39  79  43 /   0   0   0  10
DLS  81  47  87  52 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

94





000
FXUS66 KPDT 011137 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
437 AM PDT SUN MAY 1 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL RIDGE WILL
BUILD OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA TODAY. THIS
RIDGE WILL REMAIN OVER THE REGION THROUGH MONDAY, THOUGH THE RIDGE
AXIS WILL BEGIN TO SHIFT EAST MONDAY. AS SUCH WILL SEE FAIR AND DRY
CONDITIONS TODAY THROUGH MONDAY MORNING. TEMPS TODAY WILL BE WARM
WITH HIGHS IN THE 70S AT LOWER ELEVATIONS AND 60S IN THE MOUNTAINS.
THIS HEATING WILL CAUSE SOME WEAK SURFACE BASED INSTABILITY THAT
WILL CAUSE AFTERNOON AND EARLY EVENING CONVECTIVE CLOUDS OVER THE
HIGHER TERRAIN. MEANWHILE STRONG SUBSIDENCE ALOFT WILL KEEP THESE
CLOUDS SHALLOW AND FLAT. WINDS WILL BE GENERALLY FROM THE NORTH AND
NORTHEAST WITH SPEEDS UP TO 15 MPH. WITH THE RIDGE AXIS SHIFTING
EAST MONDAY INTO MONDAY NIGHT, WILL START TO SEE THE DEVELOPMENT OF
A MOIST SOUTHERLY FLOW OVER OUR WESTERN MOST ZONES. AS SUCH WILL SEE
A FEW SHOWERS OVER THE CASCADE EAST SLOPES MONDAY AFTERNOON AND
MONDAY NIGHT. ALSO THERE WILL BE THE POSSIBILITY OF A FEW
THUNDERSTORMS LATE MONDAY AFTERNOON AND MONDAY EVENING OVER THE
OREGON CASCADE EAST SLOPES. ELSEWHERE SUBSIDENCE ALOFT WILL REMAIN
STRONG AND THE AIR MASS WILL STILL BE RELATIVELY DRY. HIGH TEMPS
WILL BE A FEW DEGREES WARMER. 90

.LONG TERM...TUESDAY THROUGH SATURDAY...MODELS ARE IN PRETTY
GOOD AGREEMENT FOR THE NEAR TERM BUT WILL BEGIN TO DIVERGE LATE IN
THE WEEK. HIGH PRESSURE CONTINUES TO SHIFT EAST AS A LOW DEEPENS OFF
THE OR/WA COAST.  MOIST UNSTABLE CONDITIONS CAN BE EXPECTED...ACROSS
CENTRAL OREGON AND THE OR/WA CASCADE EAST SLOPES ON TUESDAY
AFTERNOON. HAVE KEPT A SLIGHT CHANCE OF THUNDERSTORMS ACROSS
NORTHEAST OREGON...BUT MODELS SEEM TO BE HINTING AT A SLOWER
PROGRESSION OF THE MOISTURE...SUGGESTING LOWER PROBABILITIES OF
THUNDERSTORMS ACROSS NORTHEAST OREGON...BUT FOR NOW WILL KEEP IT AS
SLIGHT CHANCE. WEDNESDAY THE LOW IS EXPECTED TO BE JUST OFF THE
SOUTHERN OR/NORTHERN CA COAST. THIS WILL PROVIDE A GOOD UNSTABLE
SETUP FOR MOST OF THE FORECAST AREA...THUSLY THUNDERSTORMS WILL BE
IN THE FORECAST FOR ALL AREAS WEDNESDAY AFTERNOON AND EVENING.

TEMPERATURES WILL COOL OFF A BIT AS WE HEAD TOWARD THE END OF THE
WORK WEEK...BUT ARE STILL EXPECTED TO BE SLIGHTLY ABOVE NORMAL. THE
REST OF THE EXTENDED HAS BEEN LEFT AS IS...WITH MAINLY CHANCE POPS
OVER THE MOUNTAINS AND SLIGHT CHANCE OVER THE LOWER ELEVATIONS. AS
THE LOW CONTINUES TO DIVE SOUTH TOWARDS SOUTHERN NEVADA...MODELS
DIVERGE IN THEIR SOLUTIONS.  SOME MODELS CONTINUE TO SPIN MOISTURE
UP INTO THE DEFORMATION ZONE...MAINLY CENTRAL AND NORTHEAST OREGON.
OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST A DRY END OF
THE WORK WEEK.  WILL HAVE TO FINE TUNE THIS AS THIS SYSTEM
APPROACHES THE NEAR TERM. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITE. WINDS WILL
GENERALLY BE LESS THAN 10 KTS. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  75  46  81  48 /   0   0   0  10
ALW  75  50  81  54 /   0   0   0  10
PSC  79  45  84  49 /   0   0   0  10
YKM  80  45  84  48 /   0   0   0  10
HRI  79  42  84  46 /   0   0   0  10
ELN  79  43  84  46 /   0   0   0  10
RDM  73  37  79  42 /   0   0  10  20
LGD  70  40  75  42 /   0   0   0  10
GCD  73  39  79  43 /   0   0   0  10
DLS  81  47  87  52 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 011002
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SUN MAY 1 2016

.SHORT TERM...TODAY THROUGH MONDAY NIGHT...AN UPPER LEVEL RIDGE WILL
BUILD OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA TODAY. THIS
RIDGE WILL REMAIN OVER THE REGION THROUGH MONDAY, THOUGH THE RIDGE
AXIS WILL BEGIN TO SHIFT EAST MONDAY. AS SUCH WILL SEE FAIR AND DRY
CONDITIONS TODAY THROUGH MONDAY MORNING. TEMPS TODAY WILL BE WARM
WITH HIGHS IN THE 70S AT LOWER ELEVATIONS AND 60S IN THE MOUNTAINS.
THIS HEATING WILL CAUSE SOME WEAK SURFACE BASED INSTABILITY THAT
WILL CAUSE AFTERNOON AND EARLY EVENING CONVECTIVE CLOUDS OVER THE
HIGHER TERRAIN. MEANWHILE STRONG SUBSIDENCE ALOFT WILL KEEP THESE
CLOUDS SHALLOW AND FLAT. WINDS WILL BE GENERALLY FROM THE NORTH AND
NORTHEAST WITH SPEEDS UP TO 15 MPH. WITH THE RIDGE AXIS SHIFTING
EAST MONDAY INTO MONDAY NIGHT, WILL START TO SEE THE DEVELOPMENT OF
A MOIST SOUTHERLY FLOW OVER OUR WESTERN MOST ZONES. AS SUCH WILL SEE
A FEW SHOWERS OVER THE CASCADE EAST SLOPES MONDAY AFTERNOON AND
MONDAY NIGHT. ALSO THERE WILL BE THE POSSIBILITY OF A FEW
THUNDERSTORMS LATE MONDAY AFTERNOON AND MONDAY EVENING OVER THE
OREGON CASCADE EAST SLOPES. ELSEWHERE SUBSIDENCE ALOFT WILL REMAIN
STRONG AND THE AIR MASS WILL STILL BE RELATIVELY DRY. HIGH TEMPS
WILL BE A FEW DEGREES WARMER. 90

.LONG TERM...TUESDAY THROUGH SATURDAY...MODELS ARE IN PRETTY
GOOD AGREEMENT FOR THE NEAR TERM BUT WILL BEGIN TO DIVERGE LATE IN
THE WEEK. HIGH PRESSURE CONTINUES TO SHIFT EAST AS A LOW DEEPENS OFF
THE OR/WA COAST.  MOIST UNSTABLE CONDITIONS CAN BE EXPECTED...ACROSS
CENTRAL OREGON AND THE OR/WA CASCADE EAST SLOPES ON TUESDAY
AFTERNOON. HAVE KEPT A SLIGHT CHANCE OF THUNDERSTORMS ACROSS
NORTHEAST OREGON...BUT MODELS SEEM TO BE HINTING AT A SLOWER
PROGRESSION OF THE MOISTURE...SUGGESTING LOWER PROBABILITIES OF
THUNDERSTORMS ACROSS NORTHEAST OREGON...BUT FOR NOW WILL KEEP IT AS
SLIGHT CHANCE. WEDNESDAY THE LOW IS EXPECTED TO BE JUST OFF THE
SOUTHERN OR/NORTHERN CA COAST. THIS WILL PROVIDE A GOOD UNSTABLE
SETUP FOR MOST OF THE FORECAST AREA...THUSLY THUNDERSTORMS WILL BE
IN THE FORECAST FOR ALL AREAS WEDNESDAY AFTERNOON AND EVENING.

TEMPERATURES WILL COOL OFF A BIT AS WE HEAD TOWARD THE END OF THE
WORK WEEK...BUT ARE STILL EXPECTED TO BE SLIGHTLY ABOVE NORMAL. THE
REST OF THE EXTENDED HAS BEEN LEFT AS IS...WITH MAINLY CHANCE POPS
OVER THE MOUNTAINS AND SLIGHT CHANCE OVER THE LOWER ELEVATIONS. AS
THE LOW CONTINUES TO DIVE SOUTH TOWARDS SOUTHERN NEVADA...MODELS
DIVERGE IN THEIR SOLUTIONS.  SOME MODELS CONTINUE TO SPIN MOISTURE
UP INTO THE DEFORMATION ZONE...MAINLY CENTRAL AND NORTHEAST OREGON.
OTHERS KEEP THE MOISTURE FAR ENOUGH SOUTH TO SUGGEST A DRY END OF
THE WORK WEEK.  WILL HAVE TO FINE TUNE THIS AS THIS SYSTEM
APPROACHES THE NEAR TERM. WEBER

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...VFR CONDITIONS WITH
MOSTLY CLEAR SKIES WILL PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF
SITES WITH WINDS BECOMING LIGHT AFTER DARK THIS EVENING AT ALL TAF
SITES.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  75  46  81  48 /   0   0   0  10
ALW  75  50  81  54 /   0   0   0  10
PSC  79  45  84  49 /   0   0   0  10
YKM  80  45  84  48 /   0   0   0  10
HRI  79  42  84  46 /   0   0   0  10
ELN  79  43  84  46 /   0   0   0  10
RDM  73  37  79  42 /   0   0  10  20
LGD  70  40  75  42 /   0   0   0  10
GCD  73  39  79  43 /   0   0   0  10
DLS  81  47  87  52 /   0   0   0  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 010237
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
737 PM PDT SAT APR 30 2016

.UPDATE...A WEAK WEATHER DISTURBANCE OVER NORTHEAST OREGON...
SOUTHEAST WASHINGTON AND NORTHERN IDAHO IS CAUSING SOME WRAP AROUND
MOISTURE AND INSTABILITY OVER THE EXTREME NORTHEAST PORTION OF THE
CWA. THERE ARE A FEW SHOWERS AS A RESULT BUT THEY ARE WEAK AND ARE
NOT PRODUCING ANY LIGHTNING. THESE SHOULD DECREASE RAPIDLY AFTER
DARK. WILL UPDATE THE FORECAST TO REMOVE PRECIPITATION FROM THE
FORECAST LATER THIS EVENING FOR TONIGHT. A HIGH PRESSURE RIDGE ALOFT
WILL BUILD OVER THE REGION LATE TONIGHT AND ON SUNDAY FOR FAIR
WEATHER AND A WARMING TREND FOR SUNDAY WITH DRY CONDITIONS. THIS
WILL PERSIST THROUGH SUNDAY NIGHT AND MONDAY MORNING. THEN THE FLOW
WILL BECOME SOUTHERLY MONDAY AFTERNOON AS THE UPPER RIDGE MOVES OFF
TO THE NORTHEAST AND AN UPPER TROUGH OFF THE COAST MOVES TOWARD THE
COAST. MOISTURE AND INCREASING INSTABILITY WILL WORK ITS WAY INTO
CENTRAL OREGON MONDAY AFTERNOON AND EVENING. THERE WILL BE A CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS OVER CENTRAL OREGON AS A RESULT...MAINLY ALONG THE
CASCADE EAST SLOPES. CONDITIONS WILL BECOME INCREASINGLY UNSTABLE
WITH MOISTURE IN A SOUTHERLY FLOW ALOFT FURTHER INTO THE COMING WEEK
WITH SHOWERS AND THUNDERSTORMS BECOMING MORE WIDESPREAD. THIS
SCENARIO IS COVERED WELL IN THE CURRENT FORECAST. IT WILL ALSO BE
WARMER ON MONDAY AND TUESDAY WITH MOSTLY LIGHT WINDS. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES WITH WINDS
BECOMING LIGHT AFTER DARK THIS EVENING AT ALL TAF SITES. 88

&&

.PREV DISCUSSION... /ISSUED 545 PM PDT SAT APR 30 2016/

SHORT TERM...A NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON THROUGH EARLY THIS EVENING
AND THEN DECREASE IN CLOUD COVER AND SHOWERS LATE THIS EVENING. AN
UPPER RIDGE WILL BUILD IN ON SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES. THIS HIGH PRESSURE WILL CONTINUE ON MONDAY WITH A
WARMING TREND CONTINUING. HOWEVER THE FLOW ALOFT ON MONDAY WILL
BEGIN TO BECOME SOUTHERLY RESULTING IN AN INCREASE IN MOISTURE AND
INSTABILITY TO CENTRAL OREGON FOR A SLIGHT CHANCE OF AFTERNOON
THUNDERSTORMS THERE...MAINLY ALONG THE OREGON CASCADE EAST SLOPES.
THEN ON TUESDAY THE FLOW ALOFT WILL BECOME STRONGER SOUTHERLY AS THE
UPPER RIDGE MOVES TO THE NORTHEAST AND AN UPPER TROUGH OFF THE COAST
MOVES TO THE COAST. THIS WILL RESULT IN MOISTURE AND INSTABILITY TO
BE PUMPED NORTHWARD INTO ALL OF THE CWA FOR A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS AREA WIDE. 88

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY...TUESDAY EVENING A DEEP
TROUGH WILL BE LOCATED OFFSHORE WITH AN ELONGATED FRONT APPROACHING
THE COAST. A WARM MOIST SOUTHERLY FLOW WILL DEVELOP OVER EASTERN
WASHINGTON AND OREGON TUESDAY...INCREASING THE CHANCE FOR SHOWERS
AND THUNDERSTORMS. INSTABILITY WILL DECREASE WITH THE LOSS OF
DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE OVERNIGHT...THEN
REDEVELOP WEDNESDAY AFTERNOON/EVENING. WEDNESDAY NIGHT THE TROUGH
WILL SPLIT AND MOVE INLAND. A CLOSED LOW WILL DEVELOP IN THE
SOUTHERN HALF OF THE TROUGH AS IT MOVES INLAND THURSDAY. THE GFS
ENSEMBLE MODELS SHOW A WIDE VARIATION IN LOCATION OF THE LOW (OREGON
TO SOUTHERN CALIFORNIA) BY FRIDAY MORNING. I BASED THE FORECAST FOR
THURSDAY AND FRIDAY ON THE MAIN ENERGY SHIFTING SOUTH AND SHOWER AND
THUNDERSTORM ACTIVITY ENHANCED BY DIURNAL HEATING/COOLING AND
OROGRAPHIC TERRAIN EFFECTS. EXPECT SHOWERS TO PERSIST OVER THE AREA
WITH THE BROAD TROUGH BUT THUNDERSTORMS COVERAGE SHOULD BE LIMITED
TO CENTRAL TO NORTHEAST OREGON. FRIDAY NIGHT AND SATURDAY SOUTHEAST
FLOW AROUND THE LOW IN CALIFORNIA WILL KEEP SHOWERS CENTRAL TO
NORTHEAST OREGON...BUT DRIER CONDITIONS WILL DEVELOP IN EASTERN
WASHINGTON AS THE LOW MOVES FARTHER SOUTHEAST.  COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  75  44  79 /  10   0   0  10
ALW  47  76  48  79 /  10   0   0  10
PSC  45  80  44  84 /  10   0   0   0
YKM  44  79  44  82 /   0   0   0   0
HRI  43  79  43  83 /  10   0   0   0
ELN  43  77  42  80 /   0   0   0   0
RDM  35  73  37  78 /   0  10   0  10
LGD  43  70  40  74 /  10   0   0  10
GCD  38  71  37  75 /  10  10  10  10
DLS  46  81  46  84 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

88/76/88





000
FXUS66 KPDT 010237
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
737 PM PDT SAT APR 30 2016

.UPDATE...A WEAK WEATHER DISTURBANCE OVER NORTHEAST OREGON...
SOUTHEAST WASHINGTON AND NORTHERN IDAHO IS CAUSING SOME WRAP AROUND
MOISTURE AND INSTABILITY OVER THE EXTREME NORTHEAST PORTION OF THE
CWA. THERE ARE A FEW SHOWERS AS A RESULT BUT THEY ARE WEAK AND ARE
NOT PRODUCING ANY LIGHTNING. THESE SHOULD DECREASE RAPIDLY AFTER
DARK. WILL UPDATE THE FORECAST TO REMOVE PRECIPITATION FROM THE
FORECAST LATER THIS EVENING FOR TONIGHT. A HIGH PRESSURE RIDGE ALOFT
WILL BUILD OVER THE REGION LATE TONIGHT AND ON SUNDAY FOR FAIR
WEATHER AND A WARMING TREND FOR SUNDAY WITH DRY CONDITIONS. THIS
WILL PERSIST THROUGH SUNDAY NIGHT AND MONDAY MORNING. THEN THE FLOW
WILL BECOME SOUTHERLY MONDAY AFTERNOON AS THE UPPER RIDGE MOVES OFF
TO THE NORTHEAST AND AN UPPER TROUGH OFF THE COAST MOVES TOWARD THE
COAST. MOISTURE AND INCREASING INSTABILITY WILL WORK ITS WAY INTO
CENTRAL OREGON MONDAY AFTERNOON AND EVENING. THERE WILL BE A CHANCE
OF SHOWERS AND A SLIGHT CHANCE OF AFTERNOON AND EVENING
THUNDERSTORMS OVER CENTRAL OREGON AS A RESULT...MAINLY ALONG THE
CASCADE EAST SLOPES. CONDITIONS WILL BECOME INCREASINGLY UNSTABLE
WITH MOISTURE IN A SOUTHERLY FLOW ALOFT FURTHER INTO THE COMING WEEK
WITH SHOWERS AND THUNDERSTORMS BECOMING MORE WIDESPREAD. THIS
SCENARIO IS COVERED WELL IN THE CURRENT FORECAST. IT WILL ALSO BE
WARMER ON MONDAY AND TUESDAY WITH MOSTLY LIGHT WINDS. 88

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WITH MOSTLY CLEAR SKIES WILL
PREVAIL FOR THE NEXT 24 HOURS AT ALL TAF SITES WITH WINDS
BECOMING LIGHT AFTER DARK THIS EVENING AT ALL TAF SITES. 88

&&

.PREV DISCUSSION... /ISSUED 545 PM PDT SAT APR 30 2016/

SHORT TERM...A NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON THROUGH EARLY THIS EVENING
AND THEN DECREASE IN CLOUD COVER AND SHOWERS LATE THIS EVENING. AN
UPPER RIDGE WILL BUILD IN ON SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES. THIS HIGH PRESSURE WILL CONTINUE ON MONDAY WITH A
WARMING TREND CONTINUING. HOWEVER THE FLOW ALOFT ON MONDAY WILL
BEGIN TO BECOME SOUTHERLY RESULTING IN AN INCREASE IN MOISTURE AND
INSTABILITY TO CENTRAL OREGON FOR A SLIGHT CHANCE OF AFTERNOON
THUNDERSTORMS THERE...MAINLY ALONG THE OREGON CASCADE EAST SLOPES.
THEN ON TUESDAY THE FLOW ALOFT WILL BECOME STRONGER SOUTHERLY AS THE
UPPER RIDGE MOVES TO THE NORTHEAST AND AN UPPER TROUGH OFF THE COAST
MOVES TO THE COAST. THIS WILL RESULT IN MOISTURE AND INSTABILITY TO
BE PUMPED NORTHWARD INTO ALL OF THE CWA FOR A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS AREA WIDE. 88

LONG TERM...TUESDAY NIGHT THROUGH SATURDAY...TUESDAY EVENING A DEEP
TROUGH WILL BE LOCATED OFFSHORE WITH AN ELONGATED FRONT APPROACHING
THE COAST. A WARM MOIST SOUTHERLY FLOW WILL DEVELOP OVER EASTERN
WASHINGTON AND OREGON TUESDAY...INCREASING THE CHANCE FOR SHOWERS
AND THUNDERSTORMS. INSTABILITY WILL DECREASE WITH THE LOSS OF
DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE OVERNIGHT...THEN
REDEVELOP WEDNESDAY AFTERNOON/EVENING. WEDNESDAY NIGHT THE TROUGH
WILL SPLIT AND MOVE INLAND. A CLOSED LOW WILL DEVELOP IN THE
SOUTHERN HALF OF THE TROUGH AS IT MOVES INLAND THURSDAY. THE GFS
ENSEMBLE MODELS SHOW A WIDE VARIATION IN LOCATION OF THE LOW (OREGON
TO SOUTHERN CALIFORNIA) BY FRIDAY MORNING. I BASED THE FORECAST FOR
THURSDAY AND FRIDAY ON THE MAIN ENERGY SHIFTING SOUTH AND SHOWER AND
THUNDERSTORM ACTIVITY ENHANCED BY DIURNAL HEATING/COOLING AND
OROGRAPHIC TERRAIN EFFECTS. EXPECT SHOWERS TO PERSIST OVER THE AREA
WITH THE BROAD TROUGH BUT THUNDERSTORMS COVERAGE SHOULD BE LIMITED
TO CENTRAL TO NORTHEAST OREGON. FRIDAY NIGHT AND SATURDAY SOUTHEAST
FLOW AROUND THE LOW IN CALIFORNIA WILL KEEP SHOWERS CENTRAL TO
NORTHEAST OREGON...BUT DRIER CONDITIONS WILL DEVELOP IN EASTERN
WASHINGTON AS THE LOW MOVES FARTHER SOUTHEAST.  COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  75  44  79 /  10   0   0  10
ALW  47  76  48  79 /  10   0   0  10
PSC  45  80  44  84 /  10   0   0   0
YKM  44  79  44  82 /   0   0   0   0
HRI  43  79  43  83 /  10   0   0   0
ELN  43  77  42  80 /   0   0   0   0
RDM  35  73  37  78 /   0  10   0  10
LGD  43  70  40  74 /  10   0   0  10
GCD  38  71  37  75 /  10  10  10  10
DLS  46  81  46  84 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

88/76/88





000
FXUS66 KPDT 010046 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
545 PM PDT SAT APR 30 2016

UPDATED TO ADD A SHORT TERM DISCUSSION

.SHORT TERM...A NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON THROUGH EARLY THIS EVENING
AND THEN DECREASE IN CLOUD COVER AND SHOWERS LATE THIS EVENING. AN
UPPER RIDGE WILL BUILD IN ON SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES. THIS HIGH PRESSURE WILL CONTINUE ON MONDAY WITH A
WARMING TREND CONTINUING. HOWEVER THE FLOW ALOFT ON MONDAY WILL
BEGIN TO BECOME SOUTHERLY RESULTING IN AN INCREASE IN MOISTURE AND
INSTABILITY TO CENTRAL OREGON FOR A SLIGHT CHANCE OF AFTERNOON
THUNDERSTORMS THERE...MAINLY ALONG THE OREGON CASCADE EAST SLOPES.
THEN ON TUESDAY THE FLOW ALOFT WILL BECOME STRONGER SOUTHERLY AS THE
UPPER RIDGE MOVES TO THE NORTHEAST AND AN UPPER TROUGH OFF THE COAST
MOVES TO THE COAST. THIS WILL RESULT IN MOISTURE AND INSTABILITY TO
BE PUMPED NORTHWARD INTO ALL OF THE CWA FOR A CHANCE OF SHOWERS AND
A SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS AREA WIDE. 88

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY...TUESDAY EVENING A DEEP
TROUGH WILL BE LOCATED OFFSHORE WITH AN ELONGATED FRONT APPROACHING
THE COAST. A WARM MOIST SOUTHERLY FLOW WILL DEVELOP OVER EASTERN
WASHINGTON AND OREGON TUESDAY...INCREASING THE CHANCE FOR SHOWERS
AND THUNDERSTORMS. INSTABILITY WILL DECREASE WITH THE LOSS OF
DAYTIME HEATING...SO THUNDERSTORMS WILL DECREASE OVERNIGHT...THEN
REDEVELOP WEDNESDAY AFTERNOON/EVENING. WEDNESDAY NIGHT THE TROUGH
WILL SPLIT AND MOVE INLAND. A CLOSED LOW WILL DEVELOP IN THE
SOUTHERN HALF OF THE TROUGH AS IT MOVES INLAND THURSDAY. THE GFS
ENSEMBLE MODELS SHOW A WIDE VARIATION IN LOCATION OF THE LOW (OREGON
TO SOUTHERN CALIFORNIA) BY FRIDAY MORNING. I BASED THE FORECAST FOR
THURSDAY AND FRIDAY ON THE MAIN ENERGY SHIFTING SOUTH AND SHOWER AND
THUNDERSTORM ACTIVITY ENHANCED BY DIURNAL HEATING/COOLING AND
OROGRAPHIC TERRAIN EFFECTS. EXPECT SHOWERS TO PERSIST OVER THE AREA
WITH THE BROAD TROUGH BUT THUNDERSTORMS COVERAGE SHOULD BE LIMITED
TO CENTRAL TO NORTHEAST OREGON. FRIDAY NIGHT AND SATURDAY SOUTHEAST
FLOW AROUND THE LOW IN CALIFORNIA WILL KEEP SHOWERS CENTRAL TO
NORTHEAST OREGON...BUT DRIER CONDITIONS WILL DEVELOP IN EASTERN
WASHINGTON AS THE LOW MOVES FARTHER SOUTHEAST.  COONFIELD

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS. DECREASING CLOUDS TONIGHT AS RIDGE BUILDS OVER COAST AND
WASHINGTON. OVERALL WINDS WILL BE DECREASING THIS EVENING. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  44  75  44  79 /   0   0   0  10
ALW  47  76  48  79 /   0   0   0  10
PSC  45  80  44  84 /   0   0   0   0
YKM  44  79  44  82 /   0   0   0   0
HRI  43  79  43  83 /   0   0   0   0
ELN  43  77  42  80 /   0   0   0   0
RDM  35  73  37  78 /   0  10   0  10
LGD  43  70  40  74 /  10   0   0  10
GCD  38  71  37  75 /  10  10  10  10
DLS  46  81  46  84 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.

&&

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

$$

88/76/76





000
FXUS66 KPDT 301749 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1049 AM PDT SAT APR 30 2016

UPDATED AVIATION DISCUSSION

.SHORT TERM...NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON TODAY ALTHOUGH THE TREND
SHOULD BE FOR GRADUAL DECREASE IN CLOUD COVER BY AFTERNOON.
REMAINDER OF THE FORECAST AREA MOSTLY SUNNY. COOL TEMPERATURES
ALOFT AND NORTH WINDS SO EXPECT HIGHS MOSTLY IN THE 60S TO LOWER
70S. UPPER RIDGE BUILDING IN SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES.  94

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS. DECREASING CLOUDS TONIGHT AS RIDGE BUILDS OVER COAST AND
WASHINGTON. OVERALL WINDS WILL BE 5 TO 15 KTS...DECREASING THIS
EVENING. 76

&&

.PREV DISCUSSION... /ISSUED 343 AM PDT SAT APR 30 2016/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...A WEAK UPPER LOW OVER THE
IDAHO PANHANDLE WILL SLOWLY DRIFT SOUTH THROUGH WESTERN IDAHO TODAY
AND INTO SOUTHEAST OREGON THIS EVENING. AREAS OF SHOWERS ASSOCIATED
WITH THIS LOW HAVE BEEN DRIFTING SOUTH THROUGH THE EASTERN THIRD OF
WASHINGTON STATE EARLY THIS MORNING. A FEW OF THESE SHOWERS HAVE
ALSO WORKED INTO PORTIONS OF NORTHEAST OREGON. EXPECT SOME SHOWERS
TO AFFECT THE BLUE MOUNTAIN FOOTHILLS, ESPECIALLY IN WASHINGTON,
THROUGH MID MORNING. ALSO EXPECT ISOLATED TO SCATTERED SHOWERS TO
PERSIST FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY THROUGH THE
DAY AS THE UPPER LOW PASSES JUST TO THE EAST. ACROSS CENTRAL
WASHINGTON AND OREGON, AN INCREASINGLY DRY NORTHERLY FLOW WILL KEEP
CONDITIONS FAIR WITH DECREASING CLOUD COVER. HIGH TEMPS WILL WARM
AROUND 10 DEGREES THIS AFTERNOON VERSUS YESTERDAY DUE TO MORE
SUNSHINE AND LESS PRECIP. AN UPPER RIDGE WILL BUILD OVER THE REGION
TONIGHT AND SUNDAY. THUS EXPECT FAIR AND DRY CONDITIONS AREA WIDE
TONIGHT THROUGH SUNDAY NIGHT, THOUGH A FEW SHOWERS MAY LINGER OVER
THE HIGHER TERRAIN OF WALLOWA COUNTY THIS EVENING. HIGH TEMPS SUNDAY
WILL WARM FURTHER, REACHING THE MID 70S TO NEAR 80 AT THE LOWER
ELEVATIONS. 90

LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BUILD
IN OVER THE AREA FOR SUNDAY INTO MONDAY NIGHT. EXPECT WARM AND DRY
CONDITIONS DURING THIS TIME PERIOD.  THERE COULD BE SOME RESIDUAL
MOISTURE OVER SOUTHEAST GRANT AND SOUTHERN UNION COUNTY ON SUNDAY AS
THE PREVIOUS LOW DEPARTS TO THE SOUTHEAST.  SLIGHT CHANCE THUNDER
SUNDAY AFTERNOON AND EVENING MAY NEED TO BE ADDED TO THESE
AREAS...BUT FOR NOW WILL KEEP THE FORECAST DRY.

AS WE MOVE INTO MID WEEK...MODELS ARE IN PRETTY GOOD AGREEMENT WITH
THE RIDGE OF HIGH PRESSURE SLOWLY SHIFTING EASTWARD.  AT THE SAME
TIME A DEEP LOW PRESSURE SYSTEM IS EXPECTED TO SET UP OFF THE
CALIFORNIA COAST.  THIS WILL ENHANCE A WARM MOIST SOUTHERLY FLOW TO
THE AREA...INCREASING THE CHANCES FOR SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR PACIFIC NORTHWEST.  BEST CHANCE SHOWER ACTIVITY
IS EXPECTED TO START ACROSS THE CASCADES AND CENTRAL OREGON AREA ON
TUESDAY...AND EXPAND IN COVERAGE ACROSS ALL AREAS BY WEDNESDAY INTO
THURSDAY.  THIS SCENARIO HAS A GOOD FETCH OF MOISTURE ALONG WITH
HIGH MODEL QPF...FAVORING SHOWERS AND THUNDERSTORMS WITH DECENT
WETTING RAIN POTENTIAL.  WILL CONTINUE TO MONITOR THE EXTENDED AND
MAKE ADJUSTMENTS AS THIS SYSTEM APPROACHES THE NEAR TERM.

HIGHS ACROSS THE LOWER ELEVATIONS LOOK TO BE IN THE MID 70S TO MID
80S FOR THE EXTENDED...AND IN THE MID 60S TO LOWER 70S FOR THE
MOUNTAINS. NORMALS FOR THIS TIME OF YEAR RANGE IN THE MID 60S TO
LOWER 70S FOR THE LOWER ELEVATIONS...AND IN THE UPPER 50S TO LOWER
60S MOUNTAINS. SO OVERALL SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL
TEMPERATURES EXPECTED FOR THE EXTENDED. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  66  44  75  47 /  10   0   0   0
ALW  66  47  76  51 /  20   0   0   0
PSC  72  45  80  46 /  10   0   0   0
YKM  73  44  81  46 /   0   0   0   0
HRI  71  43  79  45 /  10   0   0   0
ELN  71  43  79  44 /   0   0   0   0
RDM  65  35  74  37 /   0   0   0   0
LGD  60  43  71  42 /  20  10   0   0
GCD  63  38  74  42 /  10  10   0   0
DLS  72  46  83  48 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94





000
FXUS66 KPDT 301530
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
830 AM PDT SAT APR 30 2016

.SHORT TERM...NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON TODAY ALTHOUGH THE TREND
SHOULD BE FOR GRADUAL DECREASE IN CLOUD COVER BY AFTERNOON.
REMAINDER OF THE FORECAST AREA MOSTLY SUNNY. COOL TEMPERATURES
ALOFT AND NORTH WINDS SO EXPECT HIGHS MOSTLY IN THE 60S TO LOWER
70S. UPPER RIDGE BUILDING IN SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES.  94

&&

.PREV DISCUSSION... /ISSUED 343 AM PDT SAT APR 30 2016/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...A WEAK UPPER LOW OVER THE
IDAHO PANHANDLE WILL SLOWLY DRIFT SOUTH THROUGH WESTERN IDAHO TODAY
AND INTO SOUTHEAST OREGON THIS EVENING. AREAS OF SHOWERS ASSOCIATED
WITH THIS LOW HAVE BEEN DRIFTING SOUTH THROUGH THE EASTERN THIRD OF
WASHINGTON STATE EARLY THIS MORNING. A FEW OF THESE SHOWERS HAVE
ALSO WORKED INTO PORTIONS OF NORTHEAST OREGON. EXPECT SOME SHOWERS
TO AFFECT THE BLUE MOUNTAIN FOOTHILLS, ESPECIALLY IN WASHINGTON,
THROUGH MID MORNING. ALSO EXPECT ISOLATED TO SCATTERED SHOWERS TO
PERSIST FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY THROUGH THE
DAY AS THE UPPER LOW PASSES JUST TO THE EAST. ACROSS CENTRAL
WASHINGTON AND OREGON, AN INCREASINGLY DRY NORTHERLY FLOW WILL KEEP
CONDITIONS FAIR WITH DECREASING CLOUD COVER. HIGH TEMPS WILL WARM
AROUND 10 DEGREES THIS AFTERNOON VERSUS YESTERDAY DUE TO MORE
SUNSHINE AND LESS PRECIP. AN UPPER RIDGE WILL BUILD OVER THE REGION
TONIGHT AND SUNDAY. THUS EXPECT FAIR AND DRY CONDITIONS AREA WIDE
TONIGHT THROUGH SUNDAY NIGHT, THOUGH A FEW SHOWERS MAY LINGER OVER
THE HIGHER TERRAIN OF WALLOWA COUNTY THIS EVENING. HIGH TEMPS SUNDAY
WILL WARM FURTHER, REACHING THE MID 70S TO NEAR 80 AT THE LOWER
ELEVATIONS. 90

LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BUILD
IN OVER THE AREA FOR SUNDAY INTO MONDAY NIGHT. EXPECT WARM AND DRY
CONDITIONS DURING THIS TIME PERIOD.  THERE COULD BE SOME RESIDUAL
MOISTURE OVER SOUTHEAST GRANT AND SOUTHERN UNION COUNTY ON SUNDAY AS
THE PREVIOUS LOW DEPARTS TO THE SOUTHEAST.  SLIGHT CHANCE THUNDER
SUNDAY AFTERNOON AND EVENING MAY NEED TO BE ADDED TO THESE
AREAS...BUT FOR NOW WILL KEEP THE FORECAST DRY.

AS WE MOVE INTO MID WEEK...MODELS ARE IN PRETTY GOOD AGREEMENT WITH
THE RIDGE OF HIGH PRESSURE SLOWLY SHIFTING EASTWARD.  AT THE SAME
TIME A DEEP LOW PRESSURE SYSTEM IS EXPECTED TO SET UP OFF THE
CALIFORNIA COAST.  THIS WILL ENHANCE A WARM MOIST SOUTHERLY FLOW TO
THE AREA...INCREASING THE CHANCES FOR SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR PACIFIC NORTHWEST.  BEST CHANCE SHOWER ACTIVITY
IS EXPECTED TO START ACROSS THE CASCADES AND CENTRAL OREGON AREA ON
TUESDAY...AND EXPAND IN COVERAGE ACROSS ALL AREAS BY WEDNESDAY INTO
THURSDAY.  THIS SCENARIO HAS A GOOD FETCH OF MOISTURE ALONG WITH
HIGH MODEL QPF...FAVORING SHOWERS AND THUNDERSTORMS WITH DECENT
WETTING RAIN POTENTIAL.  WILL CONTINUE TO MONITOR THE EXTENDED AND
MAKE ADJUSTMENTS AS THIS SYSTEM APPROACHES THE NEAR TERM.

HIGHS ACROSS THE LOWER ELEVATIONS LOOK TO BE IN THE MID 70S TO MID
80S FOR THE EXTENDED...AND IN THE MID 60S TO LOWER 70S FOR THE
MOUNTAINS. NORMALS FOR THIS TIME OF YEAR RANGE IN THE MID 60S TO
LOWER 70S FOR THE LOWER ELEVATIONS...AND IN THE UPPER 50S TO LOWER
60S MOUNTAINS. SO OVERALL SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL
TEMPERATURES EXPECTED FOR THE EXTENDED. WEBER

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS. ISOLATED SHOWERS POSSIBLE EAST OF THE TAF SITES TODAY. ON THE
CHANCE THAT A SHOWER OR TWO MOVES OVER THE EASTERN TAF SITES...THEN
BRIEF MVFR CONDITIONS WILL BE POSSIBLE. OVERALL WINDS WILL BE 5 TO
15 KTS...WITH SOME TAF SITES GUSTING TO 25 KTS THIS AFTERNOON. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  66  44  75  47 /  10   0   0   0
ALW  66  47  76  51 /  20   0   0   0
PSC  72  45  80  46 /  10   0   0   0
YKM  73  44  81  46 /   0   0   0   0
HRI  71  43  79  45 /  10   0   0   0
ELN  71  43  79  44 /   0   0   0   0
RDM  65  35  74  37 /   0   0   0   0
LGD  60  43  71  42 /  20  10   0   0
GCD  63  38  74  42 /  10  10   0   0
DLS  72  46  83  48 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94





000
FXUS66 KPDT 301530
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
830 AM PDT SAT APR 30 2016

.SHORT TERM...NORTHERLY FLOW WILL CONTINUE TO BRING CLOUDS ACROSS
SOUTHEAST WASHINGTON AND NORTHEAST OREGON TODAY ALTHOUGH THE TREND
SHOULD BE FOR GRADUAL DECREASE IN CLOUD COVER BY AFTERNOON.
REMAINDER OF THE FORECAST AREA MOSTLY SUNNY. COOL TEMPERATURES
ALOFT AND NORTH WINDS SO EXPECT HIGHS MOSTLY IN THE 60S TO LOWER
70S. UPPER RIDGE BUILDING IN SUNDAY WITH SUNNY SKIES AND WARMER
TEMPERATURES.  94

&&

.PREV DISCUSSION... /ISSUED 343 AM PDT SAT APR 30 2016/

SHORT TERM...TODAY THROUGH SUNDAY NIGHT...A WEAK UPPER LOW OVER THE
IDAHO PANHANDLE WILL SLOWLY DRIFT SOUTH THROUGH WESTERN IDAHO TODAY
AND INTO SOUTHEAST OREGON THIS EVENING. AREAS OF SHOWERS ASSOCIATED
WITH THIS LOW HAVE BEEN DRIFTING SOUTH THROUGH THE EASTERN THIRD OF
WASHINGTON STATE EARLY THIS MORNING. A FEW OF THESE SHOWERS HAVE
ALSO WORKED INTO PORTIONS OF NORTHEAST OREGON. EXPECT SOME SHOWERS
TO AFFECT THE BLUE MOUNTAIN FOOTHILLS, ESPECIALLY IN WASHINGTON,
THROUGH MID MORNING. ALSO EXPECT ISOLATED TO SCATTERED SHOWERS TO
PERSIST FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY THROUGH THE
DAY AS THE UPPER LOW PASSES JUST TO THE EAST. ACROSS CENTRAL
WASHINGTON AND OREGON, AN INCREASINGLY DRY NORTHERLY FLOW WILL KEEP
CONDITIONS FAIR WITH DECREASING CLOUD COVER. HIGH TEMPS WILL WARM
AROUND 10 DEGREES THIS AFTERNOON VERSUS YESTERDAY DUE TO MORE
SUNSHINE AND LESS PRECIP. AN UPPER RIDGE WILL BUILD OVER THE REGION
TONIGHT AND SUNDAY. THUS EXPECT FAIR AND DRY CONDITIONS AREA WIDE
TONIGHT THROUGH SUNDAY NIGHT, THOUGH A FEW SHOWERS MAY LINGER OVER
THE HIGHER TERRAIN OF WALLOWA COUNTY THIS EVENING. HIGH TEMPS SUNDAY
WILL WARM FURTHER, REACHING THE MID 70S TO NEAR 80 AT THE LOWER
ELEVATIONS. 90

LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BUILD
IN OVER THE AREA FOR SUNDAY INTO MONDAY NIGHT. EXPECT WARM AND DRY
CONDITIONS DURING THIS TIME PERIOD.  THERE COULD BE SOME RESIDUAL
MOISTURE OVER SOUTHEAST GRANT AND SOUTHERN UNION COUNTY ON SUNDAY AS
THE PREVIOUS LOW DEPARTS TO THE SOUTHEAST.  SLIGHT CHANCE THUNDER
SUNDAY AFTERNOON AND EVENING MAY NEED TO BE ADDED TO THESE
AREAS...BUT FOR NOW WILL KEEP THE FORECAST DRY.

AS WE MOVE INTO MID WEEK...MODELS ARE IN PRETTY GOOD AGREEMENT WITH
THE RIDGE OF HIGH PRESSURE SLOWLY SHIFTING EASTWARD.  AT THE SAME
TIME A DEEP LOW PRESSURE SYSTEM IS EXPECTED TO SET UP OFF THE
CALIFORNIA COAST.  THIS WILL ENHANCE A WARM MOIST SOUTHERLY FLOW TO
THE AREA...INCREASING THE CHANCES FOR SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR PACIFIC NORTHWEST.  BEST CHANCE SHOWER ACTIVITY
IS EXPECTED TO START ACROSS THE CASCADES AND CENTRAL OREGON AREA ON
TUESDAY...AND EXPAND IN COVERAGE ACROSS ALL AREAS BY WEDNESDAY INTO
THURSDAY.  THIS SCENARIO HAS A GOOD FETCH OF MOISTURE ALONG WITH
HIGH MODEL QPF...FAVORING SHOWERS AND THUNDERSTORMS WITH DECENT
WETTING RAIN POTENTIAL.  WILL CONTINUE TO MONITOR THE EXTENDED AND
MAKE ADJUSTMENTS AS THIS SYSTEM APPROACHES THE NEAR TERM.

HIGHS ACROSS THE LOWER ELEVATIONS LOOK TO BE IN THE MID 70S TO MID
80S FOR THE EXTENDED...AND IN THE MID 60S TO LOWER 70S FOR THE
MOUNTAINS. NORMALS FOR THIS TIME OF YEAR RANGE IN THE MID 60S TO
LOWER 70S FOR THE LOWER ELEVATIONS...AND IN THE UPPER 50S TO LOWER
60S MOUNTAINS. SO OVERALL SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL
TEMPERATURES EXPECTED FOR THE EXTENDED. WEBER

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS. ISOLATED SHOWERS POSSIBLE EAST OF THE TAF SITES TODAY. ON THE
CHANCE THAT A SHOWER OR TWO MOVES OVER THE EASTERN TAF SITES...THEN
BRIEF MVFR CONDITIONS WILL BE POSSIBLE. OVERALL WINDS WILL BE 5 TO
15 KTS...WITH SOME TAF SITES GUSTING TO 25 KTS THIS AFTERNOON. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  66  44  75  47 /  10   0   0   0
ALW  66  47  76  51 /  20   0   0   0
PSC  72  45  80  46 /  10   0   0   0
YKM  73  44  81  46 /   0   0   0   0
HRI  71  43  79  45 /  10   0   0   0
ELN  71  43  79  44 /   0   0   0   0
RDM  65  35  74  37 /   0   0   0   0
LGD  60  43  71  42 /  20  10   0   0
GCD  63  38  74  42 /  10  10   0   0
DLS  72  46  83  48 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

94





000
FXUS66 KPDT 301043 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
343 AM PDT SAT APR 30 2016

UPDATED FOR AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...A WEAK UPPER LOW OVER THE
IDAHO PANHANDLE WILL SLOWLY DRIFT SOUTH THROUGH WESTERN IDAHO TODAY
AND INTO SOUTHEAST OREGON THIS EVENING. AREAS OF SHOWERS ASSOCIATED
WITH THIS LOW HAVE BEEN DRIFTING SOUTH THROUGH THE EASTERN THIRD OF
WASHINGTON STATE EARLY THIS MORNING. A FEW OF THESE SHOWERS HAVE
ALSO WORKED INTO PORTIONS OF NORTHEAST OREGON. EXPECT SOME SHOWERS
TO AFFECT THE BLUE MOUNTAIN FOOTHILLS, ESPECIALLY IN WASHINGTON,
THROUGH MID MORNING. ALSO EXPECT ISOLATED TO SCATTERED SHOWERS TO
PERSIST FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY THROUGH THE
DAY AS THE UPPER LOW PASSES JUST TO THE EAST. ACROSS CENTRAL
WASHINGTON AND OREGON, AN INCREASINGLY DRY NORTHERLY FLOW WILL KEEP
CONDITIONS FAIR WITH DECREASING CLOUD COVER. HIGH TEMPS WILL WARM
AROUND 10 DEGREES THIS AFTERNOON VERSUS YESTERDAY DUE TO MORE
SUNSHINE AND LESS PRECIP. AN UPPER RIDGE WILL BUILD OVER THE REGION
TONIGHT AND SUNDAY. THUS EXPECT FAIR AND DRY CONDITIONS AREA WIDE
TONIGHT THROUGH SUNDAY NIGHT, THOUGH A FEW SHOWERS MAY LINGER OVER
THE HIGHER TERRAIN OF WALLOWA COUNTY THIS EVENING. HIGH TEMPS SUNDAY
WILL WARM FURTHER, REACHING THE MID 70S TO NEAR 80 AT THE LOWER
ELEVATIONS. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BUILD
IN OVER THE AREA FOR SUNDAY INTO MONDAY NIGHT. EXPECT WARM AND DRY
CONDITIONS DURING THIS TIME PERIOD.  THERE COULD BE SOME RESIDUAL
MOISTURE OVER SOUTHEAST GRANT AND SOUTHERN UNION COUNTY ON SUNDAY AS
THE PREVIOUS LOW DEPARTS TO THE SOUTHEAST.  SLIGHT CHANCE THUNDER
SUNDAY AFTERNOON AND EVENING MAY NEED TO BE ADDED TO THESE
AREAS...BUT FOR NOW WILL KEEP THE FORECAST DRY.

AS WE MOVE INTO MID WEEK...MODELS ARE IN PRETTY GOOD AGREEMENT WITH
THE RIDGE OF HIGH PRESSURE SLOWLY SHIFTING EASTWARD.  AT THE SAME
TIME A DEEP LOW PRESSURE SYSTEM IS EXPECTED TO SET UP OFF THE
CALIFORNIA COAST.  THIS WILL ENHANCE A WARM MOIST SOUTHERLY FLOW TO
THE AREA...INCREASING THE CHANCES FOR SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR PACIFIC NORTHWEST.  BEST CHANCE SHOWER ACTIVITY
IS EXPECTED TO START ACROSS THE CASCADES AND CENTRAL OREGON AREA ON
TUESDAY...AND EXPAND IN COVERAGE ACROSS ALL AREAS BY WEDNESDAY INTO
THURSDAY.  THIS SCENARIO HAS A GOOD FETCH OF MOISTURE ALONG WITH
HIGH MODEL QPF...FAVORING SHOWERS AND THUNDERSTORMS WITH DECENT
WETTING RAIN POTENTIAL.  WILL CONTINUE TO MONITOR THE EXTENDED AND
MAKE ADJUSTMENTS AS THIS SYSTEM APPROACHES THE NEAR TERM.

HIGHS ACROSS THE LOWER ELEVATIONS LOOK TO BE IN THE MID 70S TO MID
80S FOR THE EXTENDED...AND IN THE MID 60S TO LOWER 70S FOR THE
MOUNTAINS. NORMALS FOR THIS TIME OF YEAR RANGE IN THE MID 60S TO
LOWER 70S FOR THE LOWER ELEVATIONS...AND IN THE UPPER 50S TO LOWER
60S MOUNTAINS. SO OVERALL SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL
TEMPERATURES EXPECTED FOR THE EXTENDED. WEBER

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS. ISOLATED SHOWERS POSSIBLE EAST OF THE TAF SITES TODAY. ON THE
CHANCE THAT A SHOWER OR TWO MOVES OVER THE EASTERN TAF SITES...THEN
BRIEF MVFR CONDITIONS WILL BE POSSIBLE. OVERALL WINDS WILL BE 5 TO
15 KTS...WITH SOME TAF SITES GUSTING TO 25 KTS THIS AFTERNOON. WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  67  44  75  47 /  10   0   0   0
ALW  67  48  76  51 /  20   0   0   0
PSC  73  45  80  46 /  10   0   0   0
YKM  74  43  81  46 /   0   0   0   0
HRI  72  42  79  45 /  10   0   0   0
ELN  72  42  79  44 /   0   0   0   0
RDM  65  33  74  37 /   0   0   0   0
LGD  60  42  71  42 /  20   0   0   0
GCD  63  37  74  42 /  10   0   0   0
DLS  73  45  83  48 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 300944
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
244 AM PDT SAT APR 30 2016

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...A WEAK UPPER LOW OVER THE
IDAHO PANHANDLE WILL SLOWLY DRIFT SOUTH THROUGH WESTERN IDAHO TODAY
AND INTO SOUTHEAST OREGON THIS EVENING. AREAS OF SHOWERS ASSOCIATED
WITH THIS LOW HAVE BEEN DRIFTING SOUTH THROUGH THE EASTERN THIRD OF
WASHINGTON STATE EARLY THIS MORNING. A FEW OF THESE SHOWERS HAVE
ALSO WORKED INTO PORTIONS OF NORTHEAST OREGON. EXPECT SOME SHOWERS
TO AFFECT THE BLUE MOUNTAIN FOOTHILLS, ESPECIALLY IN WASHINGTON,
THROUGH MID MORNING. ALSO EXPECT ISOLATED TO SCATTERED SHOWERS TO
PERSIST FROM THE BLUE MOUNTAINS EAST TO WALLOWA COUNTY THROUGH THE
DAY AS THE UPPER LOW PASSES JUST TO THE EAST. ACROSS CENTRAL
WASHINGTON AND OREGON, AN INCREASINGLY DRY NORTHERLY FLOW WILL KEEP
CONDITIONS FAIR WITH DECREASING CLOUD COVER. HIGH TEMPS WILL WARM
AROUND 10 DEGREES THIS AFTERNOON VERSUS YESTERDAY DUE TO MORE
SUNSHINE AND LESS PRECIP. AN UPPER RIDGE WILL BUILD OVER THE REGION
TONIGHT AND SUNDAY. THUS EXPECT FAIR AND DRY CONDITIONS AREA WIDE
TONIGHT THROUGH SUNDAY NIGHT, THOUGH A FEW SHOWERS MAY LINGER OVER
THE HIGHER TERRAIN OF WALLOWA COUNTY THIS EVENING. HIGH TEMPS SUNDAY
WILL WARM FURTHER, REACHING THE MID 70S TO NEAR 80 AT THE LOWER
ELEVATIONS. 90

.LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BUILD
IN OVER THE AREA FOR SUNDAY INTO MONDAY NIGHT. EXPECT WARM AND DRY
CONDITIONS DURING THIS TIME PERIOD.  THERE COULD BE SOME RESIDUAL
MOISTURE OVER SOUTHEAST GRANT AND SOUTHERN UNION COUNTY ON SUNDAY AS
THE PREVIOUS LOW DEPARTS TO THE SOUTHEAST.  SLIGHT CHANCE THUNDER
SUNDAY AFTERNOON AND EVENING MAY NEED TO BE ADDED TO THESE
AREAS...BUT FOR NOW WILL KEEP THE FORECAST DRY.

AS WE MOVE INTO MID WEEK...MODELS ARE IN PRETTY GOOD AGREEMENT WITH
THE RIDGE OF HIGH PRESSURE SLOWLY SHIFTING EASTWARD.  AT THE SAME
TIME A DEEP LOW PRESSURE SYSTEM IS EXPECTED TO SET UP OFF THE
CALIFORNIA COAST.  THIS WILL ENHANCE A WARM MOIST SOUTHERLY FLOW TO
THE AREA...INCREASING THE CHANCES FOR SHOWERS AND THUNDERSTORMS
ACROSS THE INTERIOR PACIFIC NORTHWEST.  BEST CHANCE SHOWER ACTIVITY
IS EXPECTED TO START ACROSS THE CASCADES AND CENTRAL OREGON AREA ON
TUESDAY...AND EXPAND IN COVERAGE ACROSS ALL AREAS BY WEDNESDAY INTO
THURSDAY.  THIS SCENARIO HAS A GOOD FETCH OF MOISTURE ALONG WITH
HIGH MODEL QPF...FAVORING SHOWERS AND THUNDERSTORMS WITH DECENT
WETTING RAIN POTENTIAL.  WILL CONTINUE TO MONITOR THE EXTENDED AND
MAKE ADJUSTMENTS AS THIS SYSTEM APPROACHES THE NEAR TERM.

HIGHS ACROSS THE LOWER ELEVATIONS LOOK TO BE IN THE MID 70S TO MID
80S FOR THE EXTENDED...AND IN THE MID 60S TO LOWER 70S FOR THE
MOUNTAINS. NORMALS FOR THIS TIME OF YEAR RANGE IN THE MID 60S TO
LOWER 70S FOR THE LOWER ELEVATIONS...AND IN THE UPPER 50S TO LOWER
60S MOUNTAINS. SO OVERALL SLIGHTLY ABOVE NORMAL TO WELL ABOVE NORMAL
TEMPERATURES EXPECTED FOR THE EXTENDED. WEBER

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...SHOWERS WERE APPROACHING
TAF SITES KALW AND LCL MVFR CONDITIONS ARE POSSIBLE UNTIL 08Z.
OTHERWISE A WEATHER SYSTEM IS FORECAST TO MOVE INTO THE REGION
TOWARD MORNING WITH CLOUDS AND SHOWERS. MAINLY VFR CONDITIONS WILL
TURN TO SOME LCL MVFR CONDITIONS AFTER 12Z AT KDLS...KRDM...KBDN AND
THEN THE REMAINDER OF THE TAF SITES COULD EXPERIENCE LCL MVFR
CONDITIONS AFTER 15Z IN CLOUDS AND SHOWERS. IN ADDITION WIND GUSTS
TO 25 KTS IS POSSIBLE AFTER 15Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  67  44  75  47 /  10   0   0   0
ALW  67  48  76  51 /  20   0   0   0
PSC  73  45  80  46 /  10   0   0   0
YKM  74  43  81  46 /   0   0   0   0
HRI  72  42  79  45 /  10   0   0   0
ELN  72  42  79  44 /   0   0   0   0
RDM  65  33  74  37 /   0   0   0   0
LGD  60  42  71  42 /  20   0   0   0
GCD  63  37  74  42 /  10   0   0   0
DLS  73  45  83  48 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

90/89/89





000
FXUS66 KPDT 300536 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1036 PM PDT FRI APR 29 2016

UPDATED AVIATION DISCUSSION

.UPDATE...AN UPPER LOW OVER THE IDAHO PANHANDLE HAS MOVED TO THE
MONTANA BORDER THIS EVENING AS ANOTHER UPPER LOW HAS MOVED FROM
SOUTHER OREGON TO NORTHERN NEVADA. WRAP AROUND MOISTURE FROM THE
IDAHO LOW IS KEEPING BROKEN TO OVERCAST SKIES OVER THE EASTERN TWO
THIRDS OF THE AREA WITH A FEW LIGHT RAIN SHOWERS OVER THE EASTERN
MOUNTAINS AND WALLOWA COUNTY. THE SHOWERS WILL CONTINUE TO DECREASE
OVERNIGHT BUT WILL NOT END UNTIL TOMORROW MORNING. HAVING ADJUSTED
POPS TO DRY OUT MOST THE BASIN AND CENTRAL OREGON FOR THE REST OF
THE NIGHT. FURTHER WEST, SKIES HAVE PARTIALLY CLEARED OUT AND HAVE
PUT PARTLY CLOUDY SKIES IN A BAND ALONG THE BASE OF THE CASCADES
FROM ELLENSBURG AND YAKIMA SOUTH TO BEND AND REDMOND. WINDS HAVE
BEEN DECREASING THIS EVENING AND HAVE CUT THEM BACK IN MOST PLACES A
FEW MPH FOR THE REST OF THE NIGHT. WINDS IN THE KITTITAS VALLEY HAVE
DROPPED TO 20 TO 30 MPH SO HAVE ALLOWED WIND ADVISORY TO EXPIRE AT 9
PM PDT AS SCHEDULED. TEMPERATURES LOOK GOOD SO LEFT THEM UNCHANGED.
FORECAST UPDATE WILL BE SHORTLY. PERRY

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL CONTINUE FOR THE NEXT 24
HOURS. A DISTURBANCE OVER IDAHO WILL CONTINUE TO SEND BKN-OVC SKIES
AT 4000-8000 FEET OVER THE EASTERN HALF OF THE AREA TONIGHT AND
TOMORROW MORNING BEFORE BECOMING SCATTERED AFTER 18Z. A FEW LIGHT
RAIN SHOWERS WILL BE POSSIBLE AT KALW AND PERHAPS KPDT THROUGH 13Z.
IN THE WESTERN HALF OF THE AREA FEW TO SCATTERED SKIES WILL CONTINUE
FOR THE NEXT 24 HOURS. WINDS WILL REMAIN MAINLY BELOW 15 KTS THROUGH
TOMORROW MORNING THOUGH KDLS AND KYKM MAY HAVE GUSTS TO 20 KTS
THROUGH 09Z TONIGHT. TOMORROW AFTERNOON KDLS, KRDM AND KBDN WILL
HAVE 10-15 KT WINDS WITH GUSTS TO 20 KTS. OTHER TAF SITES WILL
REMAIN BELOW 15 KTS. PERRY

&&

.PREV DISCUSSION... /ISSUED 400 PM PDT FRI APR 29 2016/

SHORT TERM...TONIGHT THROUGH MONDAY AFTERNOON...A MID/UPPER LEVEL
DEFORMATION ZONE IN WIND FLOW PATTERN ALOFT ASSOCIATED WITH UPPER
LOW OVER IDAHO PANHANDLE AND WESTERN MONTANA THIS AFTERNOON WILL
CONTINUE TRIGGERING SHOWERS THROUGH THE REMAINDER OF THIS AFTERNOON
AND THIS EVENING ACROSS THE LOWER COLUMBIA BASIN EAST OF BENTON
CITY, MOST OF THE COLUMBIA BASIN IN OREGON, ALONG THE FOOTHILLS OF
THE BLUE MOUNTAINS, THE NORTHERN BLUE MOUNTAINS, THE WALLOWA
MOUNTAINS AND WALLOWA COUNTY. A WEAK MID/UPPER LEVEL SHORT WAVE WILL
CONTINUE TO MOVE TOWARD THE SOUTHEAST ACROSS CENTRAL OREGON THIS
AFTERNOON/EVENING AND THEN EXIT THE REGION BEFORE MIDNIGHT. AS SUCH
ISOLATED SHOWERS WILL BE POSSIBLE THIS AFTERNOON/EVENING IN CENTRAL
AND NORTH CENTRAL OREGON. OVERNIGHT POPS WILL DECREASE BELOW 15
PERCENT FOR MOST OF THE FORECAST AREA, BUT THE FAR NORTHEAST
MOUNTAINS OF OREGON AND THE NORTHERN BLUE MOUNTAINS WILL SEE
SCATTERED SHOWERS OVERNIGHT INTO SATURDAY MORNING. THEN DRY
CONDITIONS WILL PREVAIL THROUGH THE WEEKEND AND MONDAY DUE TO A
MID/UPPER LEVEL LONG WAVE RIDGE OF HIGH PRESSURE THAT BUILDS OVER
PACIFIC NORTHWEST.  POLAN

LONG TERM...MONDAY NIGHT THROUGH FRIDAY. THE PACIFIC NORTHWEST WILL
BE UNDER THE INFLUENCE OF A SLOW MOVING UPPER LEVEL LOW THROUGH THE
EXTENDED PERIOD. THE GFS HAS THE UPPER LOW APPROACHING THE COAST
TUESDAY THEN SLOWLY MOVING THROUGH THE AREA WEDNESDAY AND BECOMING
NEARLY STATIONARY OVER CALIFORNIA/NEVADA THURSDAY INTO FRIDAY. THIS
WILL MAINTAIN A PARTLY TO MOSTLY CLOUDY PATTERN WITH OCCASIONAL
SHOWERS AND THUNDERSTORMS. TUESDAY WILL BE THE WARMEST DAY WITH
HIGHS IN THE 70S TO MID 80S AS THE FLOW ALOFT IS SOUTHERLY AHEAD OF
THE LOW AND SKIES WILL BE PARTLY CLOUDY. WEDNESDAY WILL BE A LITTLE
COOLER AS MORE CLOUD COVER IS EXPECTED. BY THURSDAY AND FRIDAY
TEMPERATURES ALOFT WILL BE COOLING AND HIGHS WILL BE IN THE 60S TO
MID 70S.  94

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  43  68  45  74 /  40  10   0   0
ALW  46  69  48  76 /  40  10   0   0
PSC  45  75  46  80 /  30  10   0   0
YKM  42  76  44  81 /  10   0   0   0
HRI  43  73  43  78 /  30   0   0   0
ELN  42  73  43  78 /  10   0   0   0
RDM  30  66  33  74 /  20   0   0   0
LGD  40  62  41  72 /  40  10   0  10
GCD  38  63  38  71 /  40  10   0  10
DLS  46  74  46  82 /  20   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

83/94/83





000
FXUS66 KPDT 300536 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1036 PM PDT FRI APR 29 2016

UPDATED AVIATION DISCUSSION

.UPDATE...AN UPPER LOW OVER THE IDAHO PANHANDLE HAS MOVED TO THE
MONTANA BORDER THIS EVENING AS ANOTHER UPPER LOW HAS MOVED FROM
SOUTHER OREGON TO NORTHERN NEVADA. WRAP AROUND MOISTURE FROM THE
IDAHO LOW IS KEEPING BROKEN TO OVERCAST SKIES OVER THE EASTERN TWO
THIRDS OF THE AREA WITH A FEW LIGHT RAIN SHOWERS OVER THE EASTERN
MOUNTAINS AND WALLOWA COUNTY. THE SHOWERS WILL CONTINUE TO DECREASE
OVERNIGHT BUT WILL NOT END UNTIL TOMORROW MORNING. HAVING ADJUSTED
POPS TO DRY OUT MOST THE BASIN AND CENTRAL OREGON FOR THE REST OF
THE NIGHT. FURTHER WEST, SKIES HAVE PARTIALLY CLEARED OUT AND HAVE
PUT PARTLY CLOUDY SKIES IN A BAND ALONG THE BASE OF THE CASCADES
FROM ELLENSBURG AND YAKIMA SOUTH TO BEND AND REDMOND. WINDS HAVE
BEEN DECREASING THIS EVENING AND HAVE CUT THEM BACK IN MOST PLACES A
FEW MPH FOR THE REST OF THE NIGHT. WINDS IN THE KITTITAS VALLEY HAVE
DROPPED TO 20 TO 30 MPH SO HAVE ALLOWED WIND ADVISORY TO EXPIRE AT 9
PM PDT AS SCHEDULED. TEMPERATURES LOOK GOOD SO LEFT THEM UNCHANGED.
FORECAST UPDATE WILL BE SHORTLY. PERRY

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL CONTINUE FOR THE NEXT 24
HOURS. A DISTURBANCE OVER IDAHO WILL CONTINUE TO SEND BKN-OVC SKIES
AT 4000-8000 FEET OVER THE EASTERN HALF OF THE AREA TONIGHT AND
TOMORROW MORNING BEFORE BECOMING SCATTERED AFTER 18Z. A FEW LIGHT
RAIN SHOWERS WILL BE POSSIBLE AT KALW AND PERHAPS KPDT THROUGH 13Z.
IN THE WESTERN HALF OF THE AREA FEW TO SCATTERED SKIES WILL CONTINUE
FOR THE NEXT 24 HOURS. WINDS WILL REMAIN MAINLY BELOW 15 KTS THROUGH
TOMORROW MORNING THOUGH KDLS AND KYKM MAY HAVE GUSTS TO 20 KTS
THROUGH 09Z TONIGHT. TOMORROW AFTERNOON KDLS, KRDM AND KBDN WILL
HAVE 10-15 KT WINDS WITH GUSTS TO 20 KTS. OTHER TAF SITES WILL
REMAIN BELOW 15 KTS. PERRY

&&

.PREV DISCUSSION... /ISSUED 400 PM PDT FRI APR 29 2016/

SHORT TERM...TONIGHT THROUGH MONDAY AFTERNOON...A MID/UPPER LEVEL
DEFORMATION ZONE IN WIND FLOW PATTERN ALOFT ASSOCIATED WITH UPPER
LOW OVER IDAHO PANHANDLE AND WESTERN MONTANA THIS AFTERNOON WILL
CONTINUE TRIGGERING SHOWERS THROUGH THE REMAINDER OF THIS AFTERNOON
AND THIS EVENING ACROSS THE LOWER COLUMBIA BASIN EAST OF BENTON
CITY, MOST OF THE COLUMBIA BASIN IN OREGON, ALONG THE FOOTHILLS OF
THE BLUE MOUNTAINS, THE NORTHERN BLUE MOUNTAINS, THE WALLOWA
MOUNTAINS AND WALLOWA COUNTY. A WEAK MID/UPPER LEVEL SHORT WAVE WILL
CONTINUE TO MOVE TOWARD THE SOUTHEAST ACROSS CENTRAL OREGON THIS
AFTERNOON/EVENING AND THEN EXIT THE REGION BEFORE MIDNIGHT. AS SUCH
ISOLATED SHOWERS WILL BE POSSIBLE THIS AFTERNOON/EVENING IN CENTRAL
AND NORTH CENTRAL OREGON. OVERNIGHT POPS WILL DECREASE BELOW 15
PERCENT FOR MOST OF THE FORECAST AREA, BUT THE FAR NORTHEAST
MOUNTAINS OF OREGON AND THE NORTHERN BLUE MOUNTAINS WILL SEE
SCATTERED SHOWERS OVERNIGHT INTO SATURDAY MORNING. THEN DRY
CONDITIONS WILL PREVAIL THROUGH THE WEEKEND AND MONDAY DUE TO A
MID/UPPER LEVEL LONG WAVE RIDGE OF HIGH PRESSURE THAT BUILDS OVER
PACIFIC NORTHWEST.  POLAN

LONG TERM...MONDAY NIGHT THROUGH FRIDAY. THE PACIFIC NORTHWEST WILL
BE UNDER THE INFLUENCE OF A SLOW MOVING UPPER LEVEL LOW THROUGH THE
EXTENDED PERIOD. THE GFS HAS THE UPPER LOW APPROACHING THE COAST
TUESDAY THEN SLOWLY MOVING THROUGH THE AREA WEDNESDAY AND BECOMING
NEARLY STATIONARY OVER CALIFORNIA/NEVADA THURSDAY INTO FRIDAY. THIS
WILL MAINTAIN A PARTLY TO MOSTLY CLOUDY PATTERN WITH OCCASIONAL
SHOWERS AND THUNDERSTORMS. TUESDAY WILL BE THE WARMEST DAY WITH
HIGHS IN THE 70S TO MID 80S AS THE FLOW ALOFT IS SOUTHERLY AHEAD OF
THE LOW AND SKIES WILL BE PARTLY CLOUDY. WEDNESDAY WILL BE A LITTLE
COOLER AS MORE CLOUD COVER IS EXPECTED. BY THURSDAY AND FRIDAY
TEMPERATURES ALOFT WILL BE COOLING AND HIGHS WILL BE IN THE 60S TO
MID 70S.  94

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  43  68  45  74 /  40  10   0   0
ALW  46  69  48  76 /  40  10   0   0
PSC  45  75  46  80 /  30  10   0   0
YKM  42  76  44  81 /  10   0   0   0
HRI  43  73  43  78 /  30   0   0   0
ELN  42  73  43  78 /  10   0   0   0
RDM  30  66  33  74 /  20   0   0   0
LGD  40  62  41  72 /  40  10   0  10
GCD  38  63  38  71 /  40  10   0  10
DLS  46  74  46  82 /  20   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

83/94/83





000
FXUS66 KPDT 300415
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
915 PM PDT FRI APR 29 2016

.UPDATE...AN UPPER LOW OVER THE IDAHO PANHANDLE HAS MOVED TO THE
MONTANA BORDER THIS EVENING AS ANOTHER UPPER LOW HAS MOVED FROM
SOUTHER OREGON TO NORTHERN NEVADA. WRAP AROUND MOISTURE FROM THE
IDAHO LOW IS KEEPING BROKEN TO OVERCAST SKIES OVER THE EASTERN TWO
THIRDS OF THE AREA WITH A FEW LIGHT RAIN SHOWERS OVER THE EASTERN
MOUNTAINS AND WALLOWA COUNTY. THE SHOWERS WILL CONTINUE TO DECREASE
OVERNIGHT BUT WILL NOT END UNTIL TOMORROW MORNING. HAVING ADJUSTED
POPS TO DRY OUT MOST THE BASIN AND CENTRAL OREGON FOR THE REST OF
THE NIGHT. FURTHER WEST, SKIES HAVE PARTIALLY CLEARED OUT AND HAVE
PUT PARTLY CLOUDY SKIES IN A BAND ALONG THE BASE OF THE CASCADES
FROM ELLENSBURG AND YAKIMA SOUTH TO BEND AND REDMOND. WINDS HAVE
BEEN DECREASING THIS EVENING AND HAVE CUT THEM BACK IN MOST PLACES A
FEW MPH FOR THE REST OF THE NIGHT. WINDS IN THE KITTITAS VALLEY HAVE
DROPPED TO 20 TO 30 MPH SO HAVE ALLOWED WIND ADVISORY TO EXPIRE AT 9
PM PDT AS SCHEDULED. TEMPERATURES LOOK GOOD SO LEFT THEM UNCHANGED.
FORECAST UPDATE WILL BE SHORTLY. PERRY

&&

.PREV DISCUSSION... /ISSUED 400 PM PDT FRI APR 29 2016/

SHORT TERM...TONIGHT THROUGH MONDAY AFTERNOON...A MID/UPPER LEVEL
DEFORMATION ZONE IN WIND FLOW PATTERN ALOFT ASSOCIATED WITH UPPER
LOW OVER IDAHO PANHANDLE AND WESTERN MONTANA THIS AFTERNOON WILL
CONTINUE TRIGGERING SHOWERS THROUGH THE REMAINDER OF THIS AFTERNOON
AND THIS EVENING ACROSS THE LOWER COLUMBIA BASIN EAST OF BENTON
CITY, MOST OF THE COLUMBIA BASIN IN OREGON, ALONG THE FOOTHILLS OF
THE BLUE MOUNTAINS, THE NORTHERN BLUE MOUNTAINS, THE WALLOWA
MOUNTAINS AND WALLOWA COUNTY. A WEAK MID/UPPER LEVEL SHORT WAVE WILL
CONTINUE TO MOVE TOWARD THE SOUTHEAST ACROSS CENTRAL OREGON THIS
AFTERNOON/EVENING AND THEN EXIT THE REGION BEFORE MIDNIGHT. AS SUCH
ISOLATED SHOWERS WILL BE POSSIBLE THIS AFTERNOON/EVENING IN CENTRAL
AND NORTH CENTRAL OREGON. OVERNIGHT POPS WILL DECREASE BELOW 15
PERCENT FOR MOST OF THE FORECAST AREA, BUT THE FAR NORTHEAST
MOUNTAINS OF OREGON AND THE NORTHERN BLUE MOUNTAINS WILL SEE
SCATTERED SHOWERS OVERNIGHT INTO SATURDAY MORNING. THEN DRY
CONDITIONS WILL PREVAIL THROUGH THE WEEKEND AND MONDAY DUE TO A
MID/UPPER LEVEL LONG WAVE RIDGE OF HIGH THAT BUILDS OVER PACIFIC
NORTHWEST.  POLAN

LONG TERM...MONDAY NIGHT THROUGH FRIDAY. THE PACIFIC NORTHWEST WILL
BE UNDER THE INFLUENCE OF A SLOW MOVING UPPER LEVEL LOW THROUGH THE
EXTENDED PERIOD. THE GFS HAS THE UPPER LOW APPROACHING THE COAST
TUESDAY THEN SLOWLY MOVING THROUGH THE AREA WEDNESDAY AND BECOMING
NEARLY STATIONARY OVER CALIFORNIA/NEVADA THURSDAY INTO FRIDAY. THIS
WILL MAINTAIN A PARTLY TO MOSTLY CLOUDY PATTERN WITH OCCASIONAL
SHOWERS AND THUNDERSTORMS. TUESDAY WILL BE THE WARMEST DAY WITH
HIGHS IN THE 70S TO MID 80S AS THE FLOW ALOFT IS SOUTHERLY AHEAD OF
THE LOW AND SKIES WILL BE PARTLY CLOUDY. WEDNESDAY WILL BE A LITTLE
COOLER AS MORE CLOUD COVER IS EXPECTED. BY THURSDAY AND FRIDAY
TEMPERATURES ALOFT WILL BE COOLING AND HIGHS WILL BE IN THE 60S TO
MID 70S.  94

AVIATION...00Z TAFS. SCATTERED SHOWERS WILL CONTINUE OVER THE TAF
SITES THROUGH THE EVENING. CEILINGS 040-080. CLOUDS WILL DIMINISH
LATER TONIGHT WITH SCT-BKN 040-080. WESTERLY WINDS 10-25KT. FOR
SATURDAY SCT 050-080. NORTHWEST WINDS 10-20KT.  94

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  43  68  45  74 /  40  10   0   0
ALW  46  69  48  76 /  40  10   0   0
PSC  45  75  46  80 /  30  10   0   0
YKM  42  76  44  81 /  10   0   0   0
HRI  43  73  43  78 /  30   0   0   0
ELN  42  73  43  78 /  10   0   0   0
RDM  30  66  33  74 /  20   0   0   0
LGD  40  62  41  72 /  40  10   0  10
GCD  38  63  38  71 /  40  10   0  10
DLS  46  74  46  82 /  20   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

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

$$

83/94/94





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