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000
FXUS66 KPDT 020400
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
900 PM PDT TUE SEP 1 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE
WATER VAPOR LOOP SHOWS A DEEPENING LONG WAVE OFFSHORE, WHICH WILL
PUSH A COLD FRONT INLAND TONIGHT AND THROUGH THE FORECAST AREA
DURING DAYLIGHT HOURS TOMORROW. THE FRONT WILL BRING INCREASING
CLOUDINESS OVERNIGHT AND WEDNESDAY. OROGRAPHIC LIFT AND DYNAMIC
LIFT ALONG THE FRONT WILL COMBINE TO INCREASE THE CHANCE OF
MEASURABLE RAIN FROM SHOWERS ALONG AND AHEAD OF THE FRONT ON
WEDNESDAY. THUS MOST OF THE MEASURABLE RAIN IS EXPECTED AT HIGHER
TERRAIN ELEVATIONS WITH THE FRONT. POLAN

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL OCCUR FOR THE NEXT 24
HOURS. INCREASING HIGH CLOUDS TONIGHT. LOWERING CIGS OVERNIGHT
AS A COLD FRONT MOVES SLOWLY THROUGH AFTER DAYBREAK THROUGH
WEDNESDAY AFTERNOON. WHILE LIGHT RAIN SHOWERS ARE POSSIBLE AFTER
08Z AT MOST TAF LOCATIONS DID NOT INCLUDE IN TAFS, EXCEPT AT KPDT
AND KALW, WHERE OROGRAPHIC LIFT AND DYNAMIC LIFT ALONG THE FRONT
COMBINE TO INCREASE CHANCE OF SHOWERS. WINDS INCREASE TOMORROW
BEHIND FRONT.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 325 PM PDT TUE SEP 1 2015/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINNING OF SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

&&

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

$$

99/91/76





000
FXUS66 KPDT 020400
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
900 PM PDT TUE SEP 1 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE
WATER VAPOR LOOP SHOWS A DEEPENING LONG WAVE OFFSHORE, WHICH WILL
PUSH A COLD FRONT INLAND TONIGHT AND THROUGH THE FORECAST AREA
DURING DAYLIGHT HOURS TOMORROW. THE FRONT WILL BRING INCREASING
CLOUDINESS OVERNIGHT AND WEDNESDAY. OROGRAPHIC LIFT AND DYNAMIC
LIFT ALONG THE FRONT WILL COMBINE TO INCREASE THE CHANCE OF
MEASURABLE RAIN FROM SHOWERS ALONG AND AHEAD OF THE FRONT ON
WEDNESDAY. THUS MOST OF THE MEASURABLE RAIN IS EXPECTED AT HIGHER
TERRAIN ELEVATIONS WITH THE FRONT. POLAN

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL OCCUR FOR THE NEXT 24
HOURS. INCREASING HIGH CLOUDS TONIGHT. LOWERING CIGS OVERNIGHT
AS A COLD FRONT MOVES SLOWLY THROUGH AFTER DAYBREAK THROUGH
WEDNESDAY AFTERNOON. WHILE LIGHT RAIN SHOWERS ARE POSSIBLE AFTER
08Z AT MOST TAF LOCATIONS DID NOT INCLUDE IN TAFS, EXCEPT AT KPDT
AND KALW, WHERE OROGRAPHIC LIFT AND DYNAMIC LIFT ALONG THE FRONT
COMBINE TO INCREASE CHANCE OF SHOWERS. WINDS INCREASE TOMORROW
BEHIND FRONT.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 325 PM PDT TUE SEP 1 2015/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINNING OF SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

&&

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

$$

99/91/76




000
FXUS66 KPDT 020400
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
900 PM PDT TUE SEP 1 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE
WATER VAPOR LOOP SHOWS A DEEPENING LONG WAVE OFFSHORE, WHICH WILL
PUSH A COLD FRONT INLAND TONIGHT AND THROUGH THE FORECAST AREA
DURING DAYLIGHT HOURS TOMORROW. THE FRONT WILL BRING INCREASING
CLOUDINESS OVERNIGHT AND WEDNESDAY. OROGRAPHIC LIFT AND DYNAMIC
LIFT ALONG THE FRONT WILL COMBINE TO INCREASE THE CHANCE OF
MEASURABLE RAIN FROM SHOWERS ALONG AND AHEAD OF THE FRONT ON
WEDNESDAY. THUS MOST OF THE MEASURABLE RAIN IS EXPECTED AT HIGHER
TERRAIN ELEVATIONS WITH THE FRONT. POLAN

&&

.AVIATION...06Z TAFS...VFR CONDITIONS WILL OCCUR FOR THE NEXT 24
HOURS. INCREASING HIGH CLOUDS TONIGHT. LOWERING CIGS OVERNIGHT
AS A COLD FRONT MOVES SLOWLY THROUGH AFTER DAYBREAK THROUGH
WEDNESDAY AFTERNOON. WHILE LIGHT RAIN SHOWERS ARE POSSIBLE AFTER
08Z AT MOST TAF LOCATIONS DID NOT INCLUDE IN TAFS, EXCEPT AT KPDT
AND KALW, WHERE OROGRAPHIC LIFT AND DYNAMIC LIFT ALONG THE FRONT
COMBINE TO INCREASE CHANCE OF SHOWERS. WINDS INCREASE TOMORROW
BEHIND FRONT.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 325 PM PDT TUE SEP 1 2015/

SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINNING OF SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.

LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

&&

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

$$

99/91/76





000
FXUS66 KPDT 012226 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
325 PM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINNING OF SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD


&&

.AVIATION...0Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TONIGHT. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE TO
INCREASE CHANCE OF SHOWERS. WINDS INCREASE TOMORROW BEHIND FRONT. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

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

$$

91/76/76




000
FXUS66 KPDT 012226 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
325 PM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINNING OF SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD


&&

.AVIATION...0Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TONIGHT. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE TO
INCREASE CHANCE OF SHOWERS. WINDS INCREASE TOMORROW BEHIND FRONT. 76

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

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

$$

91/76/76





000
FXUS66 KPDT 012115
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
215 PM PDT TUE SEP 1 2015

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINING SOME SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD


&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE TO
INCREASE CHANCE OF SHOWERS. 76


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

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

$$

91/76/76





000
FXUS66 KPDT 012115
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
215 PM PDT TUE SEP 1 2015

.SHORT TERM...TONIGHT THROUGH FRIDAY...THE BROAD UPPER LEVEL TROUGH
OVER THE AREA WILL BE TRANSITIONING TO A DEEP TROUGH CENTERED OVER
THE PACIFIC NORTHWEST BY FRIDAY. THIS TRANSITION WILL BEGIN LATE
TONIGHT AND WEDNESDAY AS SHORTWAVE ENERGY DROPS DOWN THE CANADIAN
COAST TOWARDS VANCOUVER ISLAND. THIS WILL ADVANCE A COLD FRONT INTO
THE FORECAST AREA EARLY WEDNESDAY THEN SLOWLY MOVE EASTWARD THROUGH
THE DAY AND OVERNIGHT. THERE WILL BE SOME PRECIPITATION ASSOCIATED
WITH THE FRONT AND A TENTH TO TWO TENTHS COULD BE POSSIBLE MAINLY
OVER THE EASTERN MOUNTAINS AND ALONG THE CASCADES. VERY LITTLE
PRECIPITATION IS EXPECTED IN THE COLUMBIA BASIN BUT THE FOOTHILLS OF
THE BLUE MOUNTAINS EAST OF HERMISTON AND PASCO COULD SEE A FEW
HUNDRETHS. TEMPERATURES WILL BEGIN TO COOL ON WEDNESDAY AS THE COLD
FRONT PASSES THROUGH THE AREA. THIS WILL BE THE BEGINING SOME SOME
UNSEASONABLY COOL WEATHER THROUGH THE REST OF THE WEEK. THE TROUGH
WILL DEEPEN FURTHER ON THURSDAY WITH MOST OF THE ENERGY REMAINING
WEST OF THE CASCADES. THIS ENERGY WILL BEGIN TO SHIFT INTO EASTERN
OREGON AND WASHINGTON ON FRIDAY ALONG WITH THE COOLEST AIR. THE
POTENTIAL IS THERE FOR THIS TO BECOME A MAJOR RAIN PRODUCER LATE
FRIDAY ESPECIALLY OVER THE EASTERN PORTION OF THE FORECAST AREA.
HAVE BEGUN TO INCREASE THE CHANCE OF PRECIPITATION FOR THIS TIME
PERIOD.


.LONG TERM...FRIDAY NIGHT THROUGH TUESDAY...AN UPPER LEVEL LOW WILL
MOVE EAST FROM CENTRAL OREGON FRIDAY AFTERNOON TO IDAHO SATURDAY.
SHOWERS AND THUNDERSTORMS WILL DECREASE OVERNIGHT FRIDAY. THE ECMWF
IS SLOWER IN MOVING THE SYSTEM OUT (SATURDAY EVENING) AND PROVIDES
MORE PRECIPITATION THAN THE GFS (SATURDAY MORNING). ENSEMBLE SPREAD
COVERS BOTH SOLUTIONS SO KEPT A FEW LINGERING SHOWERS OVER THE
EASTERN MOUNTAINS SATURDAY NIGHT AND SUNDAY. SUNDAY NIGHT AND
MONDAY DRY NORTHWESTERLY FLOW WILL BE OVER EASTERN WASHINGTON AND
OREGON WITH DRY CONDITIONS AND MODERATING TEMPERATURES. MONDAY NIGHT
AND TUESDAY ANOTHER LOW WILL DROP FROM THE GULF OF ALASKA TO
VANCOUVER ISLAND. THIS WILL BRING SHOWERS TO THE CASCADES BY
TUESDAY. THE FRONT AHEAD OF THE LOW MAY BRING A FEW SHOWERS TO THE
NORTHEAST MOUNTAINS TUESDAY NIGHT AS WELL.

SATURDAY AND SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES BELOW
NORMAL FOR THIS TIME OF YEAR AND IT WILL BE QUITE COLD IN THE
MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW TEMPERATURES IN THE
MOUNTAIN VALLEYS COULD FALL TO FREEZING OR BELOW.   COONFIELD


&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE TO
INCREASE CHANCE OF SHOWERS. 76


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  54  72  47  69 /  10  30  10  10
ALW  59  74  53  70 /  10  30  10  10
PSC  59  77  49  73 /  10  20   0  10
YKM  52  70  44  67 /  10  10  10  10
HRI  59  75  49  72 /  10  20  10  10
ELN  50  70  45  70 /  20  20  10  10
RDM  43  69  36  67 /  10  20  10  10
LGD  50  68  41  68 /  10  30  20  10
GCD  47  74  40  70 /  10  20  20  10
DLS  59  75  52  74 /  20  20  10  10

&&

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

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

$$

91/76/76




000
FXUS66 KPDT 011739 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1039 AM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE
TO INCREASE CHANCE OF SHOWERS. 76

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76




000
FXUS66 KPDT 011739 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1039 AM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE
TO INCREASE CHANCE OF SHOWERS. 76

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76





000
FXUS66 KPDT 011739 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1039 AM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE
TO INCREASE CHANCE OF SHOWERS. 76

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76





000
FXUS66 KPDT 011739 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1039 AM PDT TUE SEP 1 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.

&&

.AVIATION...18Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. INCREASING HIGH CLOUDS TODAY. LOWERING CIGS
OVERNIGHT AS FRONT MOVES THROUGH EARLY MORNING. WHILE LIGHT RAIN
SHOWERS ARE POSSIBLE AFTER 08Z AT MOST TAF LOCATIONS DID NOT INCLUDE
IN TAFS EXCEPT AT KPDT AND KALW WHERE TERRAIN AND FRONT COMBINE
TO INCREASE CHANCE OF SHOWERS. 76

&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76




000
FXUS66 KPDT 011515
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
815 AM PDT TUE SEP 1 2015

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE A GOOD AMOUNT OF HIGH CLOUDS AT
AROUND 20000 FEET AGL. WINDS WILL BE MAINLY WESTERLY AT 7-13 KT
AFTER 18Z EXCEPT 15 TO 22 KT AT KDLS...DIMINISHING SLIGHTLY AFTER
06Z. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76




000
FXUS66 KPDT 011515
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
815 AM PDT TUE SEP 1 2015

.SHORT TERM...TODAY THROUGH WEDNESDAY...A BROAD UPPER LEVEL TROUGH
CONTINUES TO SIT OVER WESTERN CANADA LEAVING THE PACIFIC NORTHWEST
UNDER A WESTERLY FLOW SOME MOISTURE IN THIS FLOW IMPACTING WESTERN
WASHINGTON AND THE CASCADES TODAY BUT OVERALL LOOKS DRY FOR THE REST
OF THE FORECAST AREA. TEMPERATURES WILL BE ABOUT THE SAME AS MONDAY
TO PERHAPS SLIGHTLY WARMER OVER THE EASTERN PORTION OF THE FORECAST
AREA. A SHORTWAVE DROPPING INTO THE TROUGH AND MOVING DOWN THE
CANADIAN COAST WILL BEGIN TO DEEPEN THE TROUGH OVERNIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT THROUGH THE FORECAST AREA
OVERNIGHT AND LOWER TEMPERATURES 5 TO 15 DEGREES ON WEDNESDAY. THE
FRONT WILL ALSO HAVE A LITTLE MOISTURE WITH IT SOME COULD SEE A
LITTLE RAIN ACROSS MORE OF THE FORECAST AREA...ESPECIALLY OVER THE
EASTERN MOUNTAINS ON WEDNESDAY.


&&

.PREV DISCUSSION... /ISSUED 300 AM PDT TUE SEP 1 2015/

SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY

LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE A GOOD AMOUNT OF HIGH CLOUDS AT
AROUND 20000 FEET AGL. WINDS WILL BE MAINLY WESTERLY AT 7-13 KT
AFTER 18Z EXCEPT 15 TO 22 KT AT KDLS...DIMINISHING SLIGHTLY AFTER
06Z. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  72  47 /   0  10  30  10
ALW  81  59  74  51 /   0  10  30  10
PSC  82  59  77  49 /   0  10  20  10
YKM  76  52  70  44 /   0  10  10  10
HRI  81  59  75  49 /   0  10  20  10
ELN  76  50  70  46 /  10  20  20  10
RDM  79  43  69  37 /   0  10  20  10
LGD  82  50  68  41 /   0  10  20  10
GCD  85  47  74  41 /   0  10  20  20
DLS  80  59  75  52 /   0  20  20  10

&&

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

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

$$

91/76/76





000
FXUS66 KPDT 011000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT TUE SEP 1 2015

.SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY


.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78


&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE A GOOD AMOUNT OF HIGH CLOUDS AT
AROUND 20000 FEET AGL. WINDS WILL BE MAINLY WESTERLY AT 7-13 KT
AFTER 18Z EXCEPT 15 TO 22 KT AT KDLS...DIMINISHING SLIGHTLY AFTER
06Z. 78


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  71  47 /   0  20  20  10
ALW  80  61  73  51 /   0  20  20  10
PSC  82  59  76  49 /   0  10  10  10
YKM  76  52  69  44 /  10  10  10  10
HRI  81  57  74  49 /   0  10  10  10
ELN  75  51  70  46 /  10  20  20  10
RDM  80  47  68  37 /   0  10  20  10
LGD  83  48  69  41 /   0  10  20  10
GCD  85  48  72  41 /   0  10  20  20
DLS  80  60  74  52 /  10  20  20  10

&&

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

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

$$

83/78/78




000
FXUS66 KPDT 011000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT TUE SEP 1 2015

.SHORT TERM...TODAY THROUGH THURSDAY...A BROAD UPPER LEVEL TROUGH
WILL REMAIN OVER THE PACIFIC NORTHWEST THROUGH THE SHORT TERM
PERIOD. AN UPPER LOW IS MOVING SOUTH ALONG THE BRITISH COLUMBIA
COAST. A GENERALLY WESTERLY FLOW TODAY WITH TURN MORE TO THE
SOUTHWEST TONIGHT AS THE LOW BEGINS DEEPENING THE TROUGH. WATER
VAPOR IMAGERY SHOWS A ZONE OF DRIER AREA MOVING INTO THE AREA.
EXPECT THAT THE WESTERLY FLOW WILL BRING A CHANCE OF LIGHT RAIN
SHOWERS TO THE WASHINGTON CASCADE CREST WHILE THE REST OF THE AREA
IS DRY. AWAY FROM THE CASCADE CREST SKIES SHOULD BE PARTLY CLOUDY.
AS THE LOW MOVES CLOSER THIS AFTERNOON, WINDS WILL INCREASE TO 10 TO
15 MPH. TEMPERATURE WILL BE NEAR NORMAL WITH HIGHS IN THE MID 70S TO
LOWER 80S. AS THE LOW MOVES ASHORE TONIGHT IN BRITISH COLUMBIA, IT
WILL PUSH A WAVE THROUGH OUR AREA LATE TONIGHT THROUGH TOMORROW
MORNING. THERE WILL BE A CHANCE OF SHOWERS ALONG THE ENTIRE CASCADE
CREST AND A SLIGHT CHANCE OF SHOWERS AS FAR EAST AS ELLENSBURG, THE
DALLES AND BEND. FURTHER EAST, THERE WILL ALSO BE A SLIGHT CHANCE OF
SHOWERS IN THE BLUE MOUNTAINS AND BLUE MOUNTAIN FOOTHILLS. THE
SHOWERS WILL LINGER IN THE AFTERNOON IN THE CASCADES AND IN THE
EASTERN MOUNTAINS. WINDS WILL PICK UP AGAIN IN THE AFTERNOON TO 10
TO 20 MPH IN THE COLUMBIA BASIN AND TO AROUND 10 MPH SOUTH OF THERE.
WITH THE TROUGH BRINGING A SHOT OF COLDER AIR, TEMPERATURES WILL BE
COOL AND IN THE MID 60S TO MID 70S. ANOTHER WAVE WILL CROSS THE
CASCADES THURSDAY AND BRING A SLIGHT CHANCE OF SHOWERS TO THE
MOUNTAINS WITH THE REST OF THE AREA DRY. TEMPERATURES WILL DROP
ANOTHER DEGREE OR TWO TO THE 60S AND LOWER 70S. PERRY


.LONG TERM...THURSDAY NIGHT THROUGH TUESDAY...A WEAK SHORTWAVE
TROUGH WILL BE EXITING THE AREA THURSDAY NIGHT WITH DECREASING
CHANCES FOR SHOWERS. A MUCH STRONGER TROUGH WILL MOVE ACROSS THE
AREA FRIDAY AND SATURDAY. THIS WILL BRING A GOOD CHANCE FOR SHOWERS
AND THUNDERSTORMS AREAWIDE ON FRIDAY AND TO AT LEAST THE EASTERN
PORTION OF THE FORECAST AREA SATURDAY. THE ECMWF IS SLOWER IN MOVING
THE SYSTEM OUT AND PROVIDES MORE QPF THAN THE GFS OVER THE
WEEKEND...ALTHOUGH THE LATEST RUN IS TRENDING A LITTLE MORE TOWARD
THE MORE PROGRESSIVE GFS. FOR NOW HAVE KEPT THE CURRENT FORECAST OF
LINGERING SHOWERS OVER THE EASTERN MOUNTAINS FOR SUNDAY BUT THAT MAY
NEED TO BE ADJUSTED DEPENDING ON HOW QUICKLY THE STORM EXITS THE
REGION. FOR MONDAY AND TUESDAY EXPECT DRY CONDITIONS AND MODERATING
TEMPERATURES. THROUGH SUNDAY TEMPERATURES WILL BE 5 TO 10 DEGREES
BELOW NORMAL FOR THIS TIME OF YEAR AND IT WILL BE POTENTIALLY QUITE
COLD IN THE MOUNTAINS AT NIGHT DEPENDING ON CLOUD COVER. LOW
TEMPERATURES IN THE MOUNTAIN VALLEYS COULD FALL TO FREEZING OR
BELOW. 78


&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE A GOOD AMOUNT OF HIGH CLOUDS AT
AROUND 20000 FEET AGL. WINDS WILL BE MAINLY WESTERLY AT 7-13 KT
AFTER 18Z EXCEPT 15 TO 22 KT AT KDLS...DIMINISHING SLIGHTLY AFTER
06Z. 78


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  79  54  71  47 /   0  20  20  10
ALW  80  61  73  51 /   0  20  20  10
PSC  82  59  76  49 /   0  10  10  10
YKM  76  52  69  44 /  10  10  10  10
HRI  81  57  74  49 /   0  10  10  10
ELN  75  51  70  46 /  10  20  20  10
RDM  80  47  68  37 /   0  10  20  10
LGD  83  48  69  41 /   0  10  20  10
GCD  85  48  72  41 /   0  10  20  20
DLS  80  60  74  52 /  10  20  20  10

&&

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

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

$$

83/78/78





000
FXUS66 KPDT 010554 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1054 PM PDT MON AUG 31 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

.AVIATION...06Z TAFS...VFR CONDITIONS WILL OCCUR WITH DRY WESTERLY
FLOW ALOFT AND ONLY SCT-BKN200 CLOUDS AND LIGHT SFC WINDS OVERNIGHT.
SKIES WILL CLEAR BY MIDDAY ON TUESDAY FOLLOWED BY SCT200-250 LATE IN
THE AFTERNOON. WINDS WILL BE VERY LIGHT FOR REMAINDER OF TONIGHT AT
KRDM AND KBDN WITH WINDS AROUND 10 KTS AT KDLS. THE REST OF THE TAF
SITES WILL HAVE DRAINAGE WINDS OF 5-10 KTS OVERNIGHT. WINDS INCREASE
LATE TUESDAY MORNING, BECOMING 10-15 KTS WITH GUSTS TO AROUND 20 KTS
BY 19Z AND THESE WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON, THEN
SLOWLY DECREASING AFTER SUNSET.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79





000
FXUS66 KPDT 010554 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1054 PM PDT MON AUG 31 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

.AVIATION...06Z TAFS...VFR CONDITIONS WILL OCCUR WITH DRY WESTERLY
FLOW ALOFT AND ONLY SCT-BKN200 CLOUDS AND LIGHT SFC WINDS OVERNIGHT.
SKIES WILL CLEAR BY MIDDAY ON TUESDAY FOLLOWED BY SCT200-250 LATE IN
THE AFTERNOON. WINDS WILL BE VERY LIGHT FOR REMAINDER OF TONIGHT AT
KRDM AND KBDN WITH WINDS AROUND 10 KTS AT KDLS. THE REST OF THE TAF
SITES WILL HAVE DRAINAGE WINDS OF 5-10 KTS OVERNIGHT. WINDS INCREASE
LATE TUESDAY MORNING, BECOMING 10-15 KTS WITH GUSTS TO AROUND 20 KTS
BY 19Z AND THESE WINDS WILL CONTINUE THROUGH TUESDAY AFTERNOON, THEN
SLOWLY DECREASING AFTER SUNSET.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79




000
FXUS66 KPDT 010300
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
800 PM PDT MON AUG 31 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

AVIATION...00Z TAFS...VFR CONDITIONS TO PREVAIL WITH GENERALLY DRY
WESTERLY FLOW ALOFT AND ONLY SCT200 AND LIGHT SFC WINDS EXCEPT
G20 AT KDLS TIL 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79





000
FXUS66 KPDT 010300
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
800 PM PDT MON AUG 31 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

AVIATION...00Z TAFS...VFR CONDITIONS TO PREVAIL WITH GENERALLY DRY
WESTERLY FLOW ALOFT AND ONLY SCT200 AND LIGHT SFC WINDS EXCEPT
G20 AT KDLS TIL 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79




000
FXUS66 KPDT 010300
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
800 PM PDT MON AUG 31 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

AVIATION...00Z TAFS...VFR CONDITIONS TO PREVAIL WITH GENERALLY DRY
WESTERLY FLOW ALOFT AND ONLY SCT200 AND LIGHT SFC WINDS EXCEPT
G20 AT KDLS TIL 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79





000
FXUS66 KPDT 010300
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
800 PM PDT MON AUG 31 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY AFTERNOON...SATELLITE WATER
VAPOR IMAGERY LOOP SHOWS A LONG WAVE TROUGH CENTERED ALONG 130W
WITH A SERIES OF DISTURBANCES MOVING THROUGH THE LONG WAVE
MID/UPPER LEVEL CYCLONIC CIRCULATION ASSOCIATED WITH THE LONG WAVE
TROUGH. THE FIRST ONE MOVING THROUGH SOUTHERN BC IS DRAGGING MID
AND HIGH CLOUDS ACROSS THE CWA THIS EVENING. ANOTHER ONE IS POISED
TO ROUND THE BASE OF THE LONG WAVE TROUGH NEAR 131W AND HAS A
DRIER AIR MASS ASSOCIATED WITH IT, AND YET ANOTHER ONE, THE
STRONGEST BY FAR, NEAR 57N/141W IN THE EASTERN GULF OF ALASKA. THE
LAST DISTURBANCE WILL DROP DOWN THE WESTERN FLANK OF THE LONG WAVE
TROUGH OVER THE NEXT 36 HOURS, THUS DIGGING THE LONG WAVE TROUGH
FARTHER SOUTH AND ALLOWING WEAK DYNAMIC LIFT TO ENTER THE FORECAST
AREA ON WEDNESDAY IN COMBINATION WITH OROGRAPHIC LIFT OVER THE
HIGHER MOUNTAINS FOR A CHANCE OF SHOWERS DURING THE DAY ON
WEDNESDAY IN THE BLUE MOUNTAINS AND ALONG THE EAST SLOPES OF THE
CASCADES. DRY CONDITIONS WILL PERSIST ELSEWHERE FOR TONIGHT
THROUGH WEDNESDAY AFTERNOON.  POLAN

&&

.PREVIOUS DISCUSSION... /ISSUED 212 PM PDT MON AUG 31 2015/

SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.

LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHANCE POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.

AVIATION...00Z TAFS...VFR CONDITIONS TO PREVAIL WITH GENERALLY DRY
WESTERLY FLOW ALOFT AND ONLY SCT200 AND LIGHT SFC WINDS EXCEPT
G20 AT KDLS TIL 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

99/91/79




000
FXUS66 KPDT 312113
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
212 PM PDT MON AUG 31 2015

.SHORT TERM...TONIGHT THROUGH THURSDAY...A BROAD UPPER LEVEL
TROUGH OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW WILL KEEP
MOST OF THE FORECAST AREA DRY EXCEPT FOR SOME SHOWERS ALONG THE
CASCADE CREST THROUGH TUESDAY. THEN SOME ENERGY DROPPING INTO THE
TROUGH WILL LEAD TO THE TROUGH DIGGING SOUTHWARD TUESDAY NIGHT AND
WEDNESDAY. THIS WILL PUSH A COLD FRONT TROUGH THE FORECAST AREA WITH
A BAND OF PRECIPITATION ASSOCIATED WITH IT TUESDAY NIGHT AND
WEDNESDAY. THE PRECIPITATION IS LIKELY TO SKIP OVER THE LOWER
ELEVATIONS BUT THE MOUNTAINS COULD END UP SEEING SOME LIGHT
ACCUMULATIONS. BY THURSDAY THE UPPER LEVEL TROUGH IS SETTLING OVER
THE REGION BUT THERE IS SOME MODEL UNCERTAINTY. HAVE INDICATED A
TREND TOWARDS MORE SHOWER ACTIVITY THURSDAY BELIEVING THE INCREASED
INSTABILITY ASSOCIATED WITH THE TROUGH WILL LEAD TO A BETTER CHANCE
OF PRECIPITATION ACROSS MOST OF THE FORECAST AREA. HIGH TEMPERATURES
WILL BEGIN TO COOL ON WEDNESDAY AND BY THURSDAY WILL BE 10 TO 15
DEGREES BELOW NORMAL.


.LONG TERM...THURSDAY NIGHT THROUGH MONDAY...ACTIVE WEATHER
PATTERN THROUGH PERIOD AND MODELS NOT IN AGREEMENT BEGINNING
SUNDAY. UPPER LEVEL LOW PRESSURE AREA TO DROP SOUTH FROM BC INTO PAC
NW ON FRIDAY. THAT MUCH MODELS AGREE UPON.  THIS WILL BRING
UNSETTLED...COOLER...AND SHOWERY CONDITIONS INTO ALL AREAS FOR
FRIDAY AND SATURDAY. ENOUGH INSTABILITY FOR THUNDERSTORMS FRIDAY.
BY SUNDAY...GFS OPENS UPPER LOW INTO A WAVE AND EJECTS INTO IDAHO AND
MONTANA...WHILE GFS/CANADIAN HAVE STRONG JET LEVEL WINDS DIVING
SOUTH ON WEST SIDE OF LOW AND KEEPING IT ANCHORED OVER SOUTHERN
OREGON FOR ABOUT 12-18 HOURS LONGER BEFORE MOVING EAST.
SO WITH THIS IN MIND I HAVE KEPT CHC POPS GOING LONGER ACROSS
EASTERN ZONES...ESPECIALLY WALLOWA COUNTY TO ACCOUNT FOR POSSIBLE
WRAPAROUND MOISTURE AFTER LOW MOVES INTO ID/MT. IF EC/CANADIAN
MODELS PROVE CORRECT...SIGNIFICANT PRECIPITATION COULD OCCUR.  FOR
NOW WILL JUST INCREASE POPS UNTIL MODELS COME INTO AGREEMENT.


&&

.AVIATION...00Z TAFS...VFR CONDITIONS TO PREVAIL WITH GENERALLY DRY
WESTERLY FLOW ALOFT AND ONLY SCT200 AND LGT SFC WINDS EXCEPT G20 AT
KDLS TIL 05Z.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  52  79  55  72 /   0   0  20  20
ALW  59  80  60  75 /   0   0  20  20
PSC  58  83  58  76 /   0   0  10  10
YKM  51  75  51  71 /  10  10  10  10
HRI  55  81  57  75 /   0   0  10  10
ELN  53  77  52  71 /  10  10  20  20
RDM  42  78  46  70 /   0   0  10  10
LGD  48  82  48  71 /   0   0  10  20
GCD  46  85  48  72 /   0   0  10  20
DLS  59  80  58  75 /   0  10  20  20

&&

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

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

$$

91/79/79




000
FXUS66 KPDT 311734 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 AM PDT MON AUG 31 2015

UPDATED AVIATION

.SHORT TERM...TODAY AND TONIGHT...NO CHANGE TO THE FORECAST. BROAD
TROUGH WILL CONTINUE OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW
BRINGING SOME PRECIPITATION TO THE WASHINGTON CASCADES BUT OTHERWISE
DRY FOR THE REST OF THE FORECAST AREA. TEMPERATURES WILL BE A LITTLE
WARMER TODAY WITH WESTERLY WINDS 5 TO 15 MPH.
&&

.AVIATION...18Z TAFS. VFR TO PREVAIL WITH MID-HIGH LEVEL CLDS ACROSS
MAINLY WA TAF SITES.  WIND OCNL G20 TIL 05Z.

&&

.PREV DISCUSSION... /ISSUED 258 AM PDT MON AUG 31 2015/

SHORT TERM...MONDAY THROUGH WEDNESDAY...MODELS ARE IN GOOD
AGREEMENT IN HAVING A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST AND WESTERN CANADA. A WESTERLY FLOW WILL BE CROSSING THE
AREA THROUGH TUESDAY MORNING AND PRECIPITATION WILL BE LIMITED TO
SOME LIGHT SHOWERS ALONG THE WASHINGTON CASCADES, PERHAPS MAKING IT
DOWN TO ELLENSBURG AT TIMES. BY TUESDAY AFTERNOON AN UPPER LOW WILL
BE DROPPING SOUTH ALONG THE BRITISH COLUMBIA COAST AND DEEPENING THE
TROUGH SOUTHWARD. THIS WILL TURN THE FLOW MORE SOUTHWESTERLY AND
BRING THE LIGHT SHOWERS INTO THE OREGON CASCADES AS WELL ON TUESDAY
AFTERNOON. TUESDAY NIGHT THE LOW WILL SEND A WAVE ASHORE AND A
SLIGHT CHANCE OF SHOWERS WILL EXPAND INTO THE EASTERN MOUNTAINS AND
WALLOWA COUNTY OVERNIGHT WHILE THE REST OF THE AREA ASIDE FROM IN
AND NEAR THE CASCADES WILL REMAIN DRY. ON WEDNESDAY THE WAVE WILL
BRING A CHANCE OF RAIN SHOWERS TO THE MOUNTAINS AND A SLIGHT CHANCE
TO THE LOWER ELEVATIONS THOUGH THE COLUMBIA BASIN WILL REMAIN DRY.
RAIN AMOUNTS WILL GENERALLY BE LESS THAN A TENTH OF AN INCH.
TEMPERATURES WILL BE IN THE 70S AND LOWER 80S TODAY AND TUESDAY BUT
WITH THE TROUGH MOVING ASHORE, TEMPERATURES WILL BE IN THE MID 60S
TO MID 70S ON WEDNESDAY. PERRY

LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...AN UPPER LEVEL TROUGH
WILL BE EXITING THE AREA WEDNESDAY EVENING WITH LINGERING CHANCES
FOR SHOWERS MAINLY OVER THE EASTERN MOUNTAINS. THURSDAY WILL BE IN
BETWEEN STORMS SYSTEMS SO MOSTLY DRY CONDITIONS ARE EXPECTED WITH
COOL TEMPERATURES. ON FRIDAY AN UPPER LEVEL TROUGH WILL BE OVER THE
AREA WITH A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ESPECIALLY
DURING THE AFTERNOON AND EVENING. AFTER FRIDAY THE MEDIUM RANGE
MODELS DIVERGE. THE ECMWF CLOSES A LOW OFF OVER THE REGION WHILE THE
GFS IS MUCH MORE PROGRESSIVE. IF THE ECMWF IS CORRECT THERE COULD BE
SIGNIFICANT RAINS ON SATURDAY AND SATURDAY NIGHT ESPECIALLY OVER
EASTERN OREGON. THE GFS SOLUTION WOULD BE DRY. FOR NOW HAVE KEPT LOW
CHANCES FOR SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FOR
SATURDAY AND SATURDAY NIGHT UNTIL IT BECOMES A BIT MORE CLEAR ON
WHAT WILL TRANSPIRE ON THE WEEKEND. BY MONDAY IT SHOULD BE DRYING
OUT WITH WESTERLY FLOW. TEMPERATURES WILL BE COOL FOR MUCH OF THE
PERIOD WITH SOME FREEZING TEMPERATURES AT NIGHT POSSIBLE IN THE
MOUNTAINS AND SNOW LEVELS 6-7 THOUSAND FEET. IT WILL WARM UP A BIT
TOWARD THE END OF THE WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES
CLOSER TO NORMAL FOR THIS TIME OF YEAR. 78

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE EXTENSIVE HIGH CLOUDS AT AROUND 20000
FEET AGL. THERE COULD BE A FEW STRATOCUMULUS AT 6-8K FEET BUT NOT
EXPECTING THESE CLOUDS TO PRODUCE A CEILING. WINDS WILL BE MAINLY
WESTERLY AT 7-12 KT AFTER 18Z BECOMING LIGHT TERRAIN DRIVEN AFTER
06Z. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  78  52  79  55 /   0   0  10  10
ALW  79  59  80  60 /   0   0  10  10
PSC  81  58  83  57 /  10   0  10  10
YKM  75  51  75  51 /  10  10  10  20
HRI  80  55  81  56 /   0   0  10  10
ELN  75  53  77  50 /  10  10  20  20
RDM  78  42  78  46 /   0   0   0  20
LGD  78  48  82  48 /  10   0   0  10
GCD  82  46  85  48 /   0   0   0  10
DLS  79  59  80  60 /  10   0  10  20

&&

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

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

$$

91/79/79





000
FXUS66 KPDT 311734 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 AM PDT MON AUG 31 2015

UPDATED AVIATION

.SHORT TERM...TODAY AND TONIGHT...NO CHANGE TO THE FORECAST. BROAD
TROUGH WILL CONTINUE OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW
BRINGING SOME PRECIPITATION TO THE WASHINGTON CASCADES BUT OTHERWISE
DRY FOR THE REST OF THE FORECAST AREA. TEMPERATURES WILL BE A LITTLE
WARMER TODAY WITH WESTERLY WINDS 5 TO 15 MPH.
&&

.AVIATION...18Z TAFS. VFR TO PREVAIL WITH MID-HIGH LEVEL CLDS ACROSS
MAINLY WA TAF SITES.  WIND OCNL G20 TIL 05Z.

&&

.PREV DISCUSSION... /ISSUED 258 AM PDT MON AUG 31 2015/

SHORT TERM...MONDAY THROUGH WEDNESDAY...MODELS ARE IN GOOD
AGREEMENT IN HAVING A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST AND WESTERN CANADA. A WESTERLY FLOW WILL BE CROSSING THE
AREA THROUGH TUESDAY MORNING AND PRECIPITATION WILL BE LIMITED TO
SOME LIGHT SHOWERS ALONG THE WASHINGTON CASCADES, PERHAPS MAKING IT
DOWN TO ELLENSBURG AT TIMES. BY TUESDAY AFTERNOON AN UPPER LOW WILL
BE DROPPING SOUTH ALONG THE BRITISH COLUMBIA COAST AND DEEPENING THE
TROUGH SOUTHWARD. THIS WILL TURN THE FLOW MORE SOUTHWESTERLY AND
BRING THE LIGHT SHOWERS INTO THE OREGON CASCADES AS WELL ON TUESDAY
AFTERNOON. TUESDAY NIGHT THE LOW WILL SEND A WAVE ASHORE AND A
SLIGHT CHANCE OF SHOWERS WILL EXPAND INTO THE EASTERN MOUNTAINS AND
WALLOWA COUNTY OVERNIGHT WHILE THE REST OF THE AREA ASIDE FROM IN
AND NEAR THE CASCADES WILL REMAIN DRY. ON WEDNESDAY THE WAVE WILL
BRING A CHANCE OF RAIN SHOWERS TO THE MOUNTAINS AND A SLIGHT CHANCE
TO THE LOWER ELEVATIONS THOUGH THE COLUMBIA BASIN WILL REMAIN DRY.
RAIN AMOUNTS WILL GENERALLY BE LESS THAN A TENTH OF AN INCH.
TEMPERATURES WILL BE IN THE 70S AND LOWER 80S TODAY AND TUESDAY BUT
WITH THE TROUGH MOVING ASHORE, TEMPERATURES WILL BE IN THE MID 60S
TO MID 70S ON WEDNESDAY. PERRY

LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...AN UPPER LEVEL TROUGH
WILL BE EXITING THE AREA WEDNESDAY EVENING WITH LINGERING CHANCES
FOR SHOWERS MAINLY OVER THE EASTERN MOUNTAINS. THURSDAY WILL BE IN
BETWEEN STORMS SYSTEMS SO MOSTLY DRY CONDITIONS ARE EXPECTED WITH
COOL TEMPERATURES. ON FRIDAY AN UPPER LEVEL TROUGH WILL BE OVER THE
AREA WITH A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ESPECIALLY
DURING THE AFTERNOON AND EVENING. AFTER FRIDAY THE MEDIUM RANGE
MODELS DIVERGE. THE ECMWF CLOSES A LOW OFF OVER THE REGION WHILE THE
GFS IS MUCH MORE PROGRESSIVE. IF THE ECMWF IS CORRECT THERE COULD BE
SIGNIFICANT RAINS ON SATURDAY AND SATURDAY NIGHT ESPECIALLY OVER
EASTERN OREGON. THE GFS SOLUTION WOULD BE DRY. FOR NOW HAVE KEPT LOW
CHANCES FOR SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FOR
SATURDAY AND SATURDAY NIGHT UNTIL IT BECOMES A BIT MORE CLEAR ON
WHAT WILL TRANSPIRE ON THE WEEKEND. BY MONDAY IT SHOULD BE DRYING
OUT WITH WESTERLY FLOW. TEMPERATURES WILL BE COOL FOR MUCH OF THE
PERIOD WITH SOME FREEZING TEMPERATURES AT NIGHT POSSIBLE IN THE
MOUNTAINS AND SNOW LEVELS 6-7 THOUSAND FEET. IT WILL WARM UP A BIT
TOWARD THE END OF THE WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES
CLOSER TO NORMAL FOR THIS TIME OF YEAR. 78

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE EXTENSIVE HIGH CLOUDS AT AROUND 20000
FEET AGL. THERE COULD BE A FEW STRATOCUMULUS AT 6-8K FEET BUT NOT
EXPECTING THESE CLOUDS TO PRODUCE A CEILING. WINDS WILL BE MAINLY
WESTERLY AT 7-12 KT AFTER 18Z BECOMING LIGHT TERRAIN DRIVEN AFTER
06Z. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  78  52  79  55 /   0   0  10  10
ALW  79  59  80  60 /   0   0  10  10
PSC  81  58  83  57 /  10   0  10  10
YKM  75  51  75  51 /  10  10  10  20
HRI  80  55  81  56 /   0   0  10  10
ELN  75  53  77  50 /  10  10  20  20
RDM  78  42  78  46 /   0   0   0  20
LGD  78  48  82  48 /  10   0   0  10
GCD  82  46  85  48 /   0   0   0  10
DLS  79  59  80  60 /  10   0  10  20

&&

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

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

$$

91/79/79




000
FXUS66 KPDT 311506
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
806 AM PDT MON AUG 31 2015

.SHORT TERM...TODAY AND TONIGHT...NO CHANGE TO THE FORECAST. BROAD
TROUGH WILL CONTINUE OVER THE PACIFIC NORTHWEST WITH A WESTERLY FLOW
BRINGING SOME PRECIPITATION TO THE WASHINGTON CASCADES BUT OTHERWISE
DRY FOR THE REST OF THE FORECAST AREA. TEMPERATURES WILL BE A LITTLE
WARMER TODAY WITH WESTERLY WINDS 5 TO 15 MPH.


&&

.PREV DISCUSSION... /ISSUED 258 AM PDT MON AUG 31 2015/

SHORT TERM...MONDAY THROUGH WEDNESDAY...MODELS ARE IN GOOD
AGREEMENT IN HAVING A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST AND WESTERN CANADA. A WESTERLY FLOW WILL BE CROSSING THE
AREA THROUGH TUESDAY MORNING AND PRECIPITATION WILL BE LIMITED TO
SOME LIGHT SHOWERS ALONG THE WASHINGTON CASCADES, PERHAPS MAKING IT
DOWN TO ELLENSBURG AT TIMES. BY TUESDAY AFTERNOON AN UPPER LOW WILL
BE DROPPING SOUTH ALONG THE BRITISH COLUMBIA COAST AND DEEPENING THE
TROUGH SOUTHWARD. THIS WILL TURN THE FLOW MORE SOUTHWESTERLY AND
BRING THE LIGHT SHOWERS INTO THE OREGON CASCADES AS WELL ON TUESDAY
AFTERNOON. TUESDAY NIGHT THE LOW WILL SEND A WAVE ASHORE AND A
SLIGHT CHANCE OF SHOWERS WILL EXPAND INTO THE EASTERN MOUNTAINS AND
WALLOWA COUNTY OVERNIGHT WHILE THE REST OF THE AREA ASIDE FROM IN
AND NEAR THE CASCADES WILL REMAIN DRY. ON WEDNESDAY THE WAVE WILL
BRING A CHANCE OF RAIN SHOWERS TO THE MOUNTAINS AND A SLIGHT CHANCE
TO THE LOWER ELEVATIONS THOUGH THE COLUMBIA BASIN WILL REMAIN DRY.
RAIN AMOUNTS WILL GENERALLY BE LESS THAN A TENTH OF AN INCH.
TEMPERATURES WILL BE IN THE 70S AND LOWER 80S TODAY AND TUESDAY BUT
WITH THE TROUGH MOVING ASHORE, TEMPERATURES WILL BE IN THE MID 60S
TO MID 70S ON WEDNESDAY. PERRY

LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...AN UPPER LEVEL TROUGH
WILL BE EXITING THE AREA WEDNESDAY EVENING WITH LINGERING CHANCES
FOR SHOWERS MAINLY OVER THE EASTERN MOUNTAINS. THURSDAY WILL BE IN
BETWEEN STORMS SYSTEMS SO MOSTLY DRY CONDITIONS ARE EXPECTED WITH
COOL TEMPERATURES. ON FRIDAY AN UPPER LEVEL TROUGH WILL BE OVER THE
AREA WITH A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ESPECIALLY
DURING THE AFTERNOON AND EVENING. AFTER FRIDAY THE MEDIUM RANGE
MODELS DIVERGE. THE ECMWF CLOSES A LOW OFF OVER THE REGION WHILE THE
GFS IS MUCH MORE PROGRESSIVE. IF THE ECMWF IS CORRECT THERE COULD BE
SIGNIFICANT RAINS ON SATURDAY AND SATURDAY NIGHT ESPECIALLY OVER
EASTERN OREGON. THE GFS SOLUTION WOULD BE DRY. FOR NOW HAVE KEPT LOW
CHANCES FOR SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FOR
SATURDAY AND SATURDAY NIGHT UNTIL IT BECOMES A BIT MORE CLEAR ON
WHAT WILL TRANSPIRE ON THE WEEKEND. BY MONDAY IT SHOULD BE DRYING
OUT WITH WESTERLY FLOW. TEMPERATURES WILL BE COOL FOR MUCH OF THE
PERIOD WITH SOME FREEZING TEMPERATURES AT NIGHT POSSIBLE IN THE
MOUNTAINS AND SNOW LEVELS 6-7 THOUSAND FEET. IT WILL WARM UP A BIT
TOWARD THE END OF THE WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES
CLOSER TO NORMAL FOR THIS TIME OF YEAR. 78

AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE EXTENSIVE HIGH CLOUDS AT AROUND 20000
FEET AGL. THERE COULD BE A FEW STRATOCUMULUS AT 6-8K FEET BUT NOT
EXPECTING THESE CLOUDS TO PRODUCE A CEILING. WINDS WILL BE MAINLY
WESTERLY AT 7-12 KT AFTER 18Z BECOMING LIGHT TERRAIN DRIVEN AFTER
06Z. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  78  52  79  55 /   0   0  10  10
ALW  79  59  80  60 /   0   0  10  10
PSC  81  58  83  57 /  10   0  10  10
YKM  75  51  75  51 /  10  10  10  20
HRI  80  55  81  56 /   0   0  10  10
ELN  75  53  77  50 /  10  10  20  20
RDM  78  42  78  46 /   0   0   0  20
LGD  78  48  82  48 /  10   0   0  10
GCD  82  46  85  48 /   0   0   0  10
DLS  79  59  80  60 /  10   0  10  20

&&

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

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

$$

91/79/79





000
FXUS66 KPDT 310958
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
258 AM PDT MON AUG 31 2015

.SHORT TERM...MONDAY THROUGH WEDNESDAY...MODELS ARE IN GOOD
AGREEMENT IN HAVING A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST AND WESTERN CANADA. A WESTERLY FLOW WILL BE CROSSING THE
AREA THROUGH TUESDAY MORNING AND PRECIPITATION WILL BE LIMITED TO
SOME LIGHT SHOWERS ALONG THE WASHINGTON CASCADES, PERHAPS MAKING IT
DOWN TO ELLENSBURG AT TIMES. BY TUESDAY AFTERNOON AN UPPER LOW WILL
BE DROPPING SOUTH ALONG THE BRITISH COLUMBIA COAST AND DEEPENING THE
TROUGH SOUTHWARD. THIS WILL TURN THE FLOW MORE SOUTHWESTERLY AND
BRING THE LIGHT SHOWERS INTO THE OREGON CASCADES AS WELL ON TUESDAY
AFTERNOON. TUESDAY NIGHT THE LOW WILL SEND A WAVE ASHORE AND A
SLIGHT CHANCE OF SHOWERS WILL EXPAND INTO THE EASTERN MOUNTAINS AND
WALLOWA COUNTY OVERNIGHT WHILE THE REST OF THE AREA ASIDE FROM IN
AND NEAR THE CASCADES WILL REMAIN DRY. ON WEDNESDAY THE WAVE WILL
BRING A CHANCE OF RAIN SHOWERS TO THE MOUNTAINS AND A SLIGHT CHANCE
TO THE LOWER ELEVATIONS THOUGH THE COLUMBIA BASIN WILL REMAIN DRY.
RAIN AMOUNTS WILL GENERALLY BE LESS THAN A TENTH OF AN INCH.
TEMPERATURES WILL BE IN THE 70S AND LOWER 80S TODAY AND TUESDAY BUT
WITH THE TROUGH MOVING ASHORE, TEMPERATURES WILL BE IN THE MID 60S
TO MID 70S ON WEDNESDAY. PERRY

.LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...AN UPPER LEVEL TROUGH
WILL BE EXITING THE AREA WEDNESDAY EVENING WITH LINGERING CHANCES
FOR SHOWERS MAINLY OVER THE EASTERN MOUNTAINS. THURSDAY WILL BE IN
BETWEEN STORMS SYSTEMS SO MOSTLY DRY CONDITIONS ARE EXPECTED WITH
COOL TEMPERATURES. ON FRIDAY AN UPPER LEVEL TROUGH WILL BE OVER THE
AREA WITH A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ESPECIALLY
DURING THE AFTERNOON AND EVENING. AFTER FRIDAY THE MEDIUM RANGE
MODELS DIVERGE. THE ECMWF CLOSES A LOW OFF OVER THE REGION WHILE THE
GFS IS MUCH MORE PROGRESSIVE. IF THE ECMWF IS CORRECT THERE COULD BE
SIGNIFICANT RAINS ON SATURDAY AND SATURDAY NIGHT ESPECIALLY OVER
EASTERN OREGON. THE GFS SOLUTION WOULD BE DRY. FOR NOW HAVE KEPT LOW
CHANCES FOR SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FOR
SATURDAY AND SATURDAY NIGHT UNTIL IT BECOMES A BIT MORE CLEAR ON
WHAT WILL TRANSPIRE ON THE WEEKEND. BY MONDAY IT SHOULD BE DRYING
OUT WITH WESTERLY FLOW. TEMPERATURES WILL BE COOL FOR MUCH OF THE
PERIOD WITH SOME FREEZING TEMPERATURES AT NIGHT POSSIBLE IN THE
MOUNTAINS AND SNOW LEVELS 6-7 THOUSAND FEET. IT WILL WARM UP A BIT
TOWARD THE END OF THE WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES
CLOSER TO NORMAL FOR THIS TIME OF YEAR. 78


&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE EXTENSIVE HIGH CLOUDS AT AROUND 20000
FEET AGL. THERE COULD BE A FEW STRATOCUMULUS AT 6-8K FEET BUT NOT
EXPECTING THESE CLOUDS TO PRODUCE A CEILING. WINDS WILL BE MAINLY
WESTERLY AT 7-12 KT AFTER 18Z BECOMING LIGHT TERRAIN DRIVEN AFTER
06Z. 78


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  77  53  78  55 /  10   0  10  20
ALW  78  59  80  60 /  10   0  10  20
PSC  80  55  82  57 /  10   0  10  10
YKM  73  51  75  51 /  10  10  10  20
HRI  79  56  80  56 /  10   0  10  10
ELN  73  52  76  50 /  20  20  20  20
RDM  77  43  78  46 /  10   0   0  20
LGD  77  46  81  48 /  10   0   0  10
GCD  81  46  85  48 /  10   0   0  10
DLS  79  61  79  60 /  10  10  10  20

&&

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

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

$$

83/78/78





000
FXUS66 KPDT 310958
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
258 AM PDT MON AUG 31 2015

.SHORT TERM...MONDAY THROUGH WEDNESDAY...MODELS ARE IN GOOD
AGREEMENT IN HAVING A BROAD UPPER LEVEL TROUGH OVER THE PACIFIC
NORTHWEST AND WESTERN CANADA. A WESTERLY FLOW WILL BE CROSSING THE
AREA THROUGH TUESDAY MORNING AND PRECIPITATION WILL BE LIMITED TO
SOME LIGHT SHOWERS ALONG THE WASHINGTON CASCADES, PERHAPS MAKING IT
DOWN TO ELLENSBURG AT TIMES. BY TUESDAY AFTERNOON AN UPPER LOW WILL
BE DROPPING SOUTH ALONG THE BRITISH COLUMBIA COAST AND DEEPENING THE
TROUGH SOUTHWARD. THIS WILL TURN THE FLOW MORE SOUTHWESTERLY AND
BRING THE LIGHT SHOWERS INTO THE OREGON CASCADES AS WELL ON TUESDAY
AFTERNOON. TUESDAY NIGHT THE LOW WILL SEND A WAVE ASHORE AND A
SLIGHT CHANCE OF SHOWERS WILL EXPAND INTO THE EASTERN MOUNTAINS AND
WALLOWA COUNTY OVERNIGHT WHILE THE REST OF THE AREA ASIDE FROM IN
AND NEAR THE CASCADES WILL REMAIN DRY. ON WEDNESDAY THE WAVE WILL
BRING A CHANCE OF RAIN SHOWERS TO THE MOUNTAINS AND A SLIGHT CHANCE
TO THE LOWER ELEVATIONS THOUGH THE COLUMBIA BASIN WILL REMAIN DRY.
RAIN AMOUNTS WILL GENERALLY BE LESS THAN A TENTH OF AN INCH.
TEMPERATURES WILL BE IN THE 70S AND LOWER 80S TODAY AND TUESDAY BUT
WITH THE TROUGH MOVING ASHORE, TEMPERATURES WILL BE IN THE MID 60S
TO MID 70S ON WEDNESDAY. PERRY

.LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...AN UPPER LEVEL TROUGH
WILL BE EXITING THE AREA WEDNESDAY EVENING WITH LINGERING CHANCES
FOR SHOWERS MAINLY OVER THE EASTERN MOUNTAINS. THURSDAY WILL BE IN
BETWEEN STORMS SYSTEMS SO MOSTLY DRY CONDITIONS ARE EXPECTED WITH
COOL TEMPERATURES. ON FRIDAY AN UPPER LEVEL TROUGH WILL BE OVER THE
AREA WITH A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ESPECIALLY
DURING THE AFTERNOON AND EVENING. AFTER FRIDAY THE MEDIUM RANGE
MODELS DIVERGE. THE ECMWF CLOSES A LOW OFF OVER THE REGION WHILE THE
GFS IS MUCH MORE PROGRESSIVE. IF THE ECMWF IS CORRECT THERE COULD BE
SIGNIFICANT RAINS ON SATURDAY AND SATURDAY NIGHT ESPECIALLY OVER
EASTERN OREGON. THE GFS SOLUTION WOULD BE DRY. FOR NOW HAVE KEPT LOW
CHANCES FOR SHOWERS AND THUNDERSTORMS OVER THE EASTERN MOUNTAINS FOR
SATURDAY AND SATURDAY NIGHT UNTIL IT BECOMES A BIT MORE CLEAR ON
WHAT WILL TRANSPIRE ON THE WEEKEND. BY MONDAY IT SHOULD BE DRYING
OUT WITH WESTERLY FLOW. TEMPERATURES WILL BE COOL FOR MUCH OF THE
PERIOD WITH SOME FREEZING TEMPERATURES AT NIGHT POSSIBLE IN THE
MOUNTAINS AND SNOW LEVELS 6-7 THOUSAND FEET. IT WILL WARM UP A BIT
TOWARD THE END OF THE WEEKEND INTO EARLY NEXT WEEK WITH TEMPERATURES
CLOSER TO NORMAL FOR THIS TIME OF YEAR. 78


&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL PREVAIL THROUGH THE
FORECAST PERIOD. THERE WILL BE EXTENSIVE HIGH CLOUDS AT AROUND 20000
FEET AGL. THERE COULD BE A FEW STRATOCUMULUS AT 6-8K FEET BUT NOT
EXPECTING THESE CLOUDS TO PRODUCE A CEILING. WINDS WILL BE MAINLY
WESTERLY AT 7-12 KT AFTER 18Z BECOMING LIGHT TERRAIN DRIVEN AFTER
06Z. 78


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  77  53  78  55 /  10   0  10  20
ALW  78  59  80  60 /  10   0  10  20
PSC  80  55  82  57 /  10   0  10  10
YKM  73  51  75  51 /  10  10  10  20
HRI  79  56  80  56 /  10   0  10  10
ELN  73  52  76  50 /  20  20  20  20
RDM  77  43  78  46 /  10   0   0  20
LGD  77  46  81  48 /  10   0   0  10
GCD  81  46  85  48 /  10   0   0  10
DLS  79  61  79  60 /  10  10  10  20

&&

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

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

$$

83/78/78




000
FXUS66 KPDT 310536 AAB
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 PM PDT SUN AUG 30 2015

UPDATED THE AVIATION DISCUSSION

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES...THE CLOUDS AND SHOWERS FROM EARLIER WERE MOVING AWAY FROM
THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO CLIP THE FAR NW
CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG AND NEAR THE EAST
SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS FILTERING INTO
THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS THIS. OTHER
THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE PRESENT SHORT
TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...TAF SITE KRDM MAY EXPERIENCE SCT040 UNTIL 08Z...
OTHERWISE MAINLY VFR CONDITIONS WILL PERSIST ACROSS ALL TAF SITES
FOR THE NEXT 24 HOURS.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/97





000
FXUS66 KPDT 310536 AAB
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 PM PDT SUN AUG 30 2015

UPDATED THE AVIATION DISCUSSION

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES...THE CLOUDS AND SHOWERS FROM EARLIER WERE MOVING AWAY FROM
THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO CLIP THE FAR NW
CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG AND NEAR THE EAST
SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS FILTERING INTO
THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS THIS. OTHER
THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE PRESENT SHORT
TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...TAF SITE KRDM MAY EXPERIENCE SCT040 UNTIL 08Z...
OTHERWISE MAINLY VFR CONDITIONS WILL PERSIST ACROSS ALL TAF SITES
FOR THE NEXT 24 HOURS.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/97




000
FXUS66 KPDT 310536 AAB
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 PM PDT SUN AUG 30 2015

UPDATED THE AVIATION DISCUSSION

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES...THE CLOUDS AND SHOWERS FROM EARLIER WERE MOVING AWAY FROM
THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO CLIP THE FAR NW
CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG AND NEAR THE EAST
SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS FILTERING INTO
THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS THIS. OTHER
THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE PRESENT SHORT
TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...TAF SITE KRDM MAY EXPERIENCE SCT040 UNTIL 08Z...
OTHERWISE MAINLY VFR CONDITIONS WILL PERSIST ACROSS ALL TAF SITES
FOR THE NEXT 24 HOURS.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/97





000
FXUS66 KPDT 310536 AAB
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
1030 PM PDT SUN AUG 30 2015

UPDATED THE AVIATION DISCUSSION

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES...THE CLOUDS AND SHOWERS FROM EARLIER WERE MOVING AWAY FROM
THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO CLIP THE FAR NW
CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG AND NEAR THE EAST
SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS FILTERING INTO
THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS THIS. OTHER
THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE PRESENT SHORT
TERM FORECAST APPEARS ON TRACK FOR NOW.

.AVIATION...TAF SITE KRDM MAY EXPERIENCE SCT040 UNTIL 08Z...
OTHERWISE MAINLY VFR CONDITIONS WILL PERSIST ACROSS ALL TAF SITES
FOR THE NEXT 24 HOURS.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/97




000
FXUS66 KPDT 310228 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
725 PM PDT SUN AUG 30 2015

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES THIS EVENING...THE CLOUDS AND SHOWERS FROM EARLIER WERE
MOVING AWAY FROM THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO
CLIP THE FAR NW CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG
AND NEAR THE EAST SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS
FILTERING INTO THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS
THIS. OTHER THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE
PRESENT SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. A SYSTEM WILL EXIT THE REGION WITH DECREASING
CLOUDS IN ITS WAKE. WINDS 10-20 KTS WITH HIGHER GUSTS WILL DECREASE
TO 10 KTS OR BELOW OVERNIGHT. THE WIND WILL INCREASE AGAIN DURING
THE AFTERNOON TO GENERALLY LESS THAN 15 KTS. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/





000
FXUS66 KPDT 310228 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
725 PM PDT SUN AUG 30 2015

.UPDATE...ALTHOUGH SOME RAIN SHOWERS WERE LINGERING OVER THE WA/OR
CASCADES THIS EVENING...THE CLOUDS AND SHOWERS FROM EARLIER WERE
MOVING AWAY FROM THE REST OF THE AREA. A DISTURBANCE IS EXPECTED TO
CLIP THE FAR NW CWA AND THE CLOUDS AND SHOWERS WILL PERSIST ALONG
AND NEAR THE EAST SLOPES OF THE WA CASCADES. OTHERWISE DRIER AIR WAS
FILTERING INTO THE REMAINDER OF THE AREA AND THE FORECAST REPRESENTS
THIS. OTHER THAN A SLIGHT ADJUSTMENT TO OVERNIGHT TEMPERATURES THE
PRESENT SHORT TERM FORECAST APPEARS ON TRACK FOR NOW.

&&

.PREV DISCUSSION... /ISSUED 245 PM PDT SUN AUG 30 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. A SYSTEM WILL EXIT THE REGION WITH DECREASING
CLOUDS IN ITS WAKE. WINDS 10-20 KTS WITH HIGHER GUSTS WILL DECREASE
TO 10 KTS OR BELOW OVERNIGHT. THE WIND WILL INCREASE AGAIN DURING
THE AFTERNOON TO GENERALLY LESS THAN 15 KTS. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  50  79  51  80 /   0  10   0  10
ALW  57  80  57  81 /   0  10   0  10
PSC  56  82  55  82 /   0  10   0  10
YKM  54  76  48  76 /  10  10  10  10
HRI  53  82  52  83 /   0  10   0  10
ELN  54  74  52  74 /  10  20  20  20
RDM  40  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  47  80  47  81 /  10  10   0   0
DLS  58  79  59  78 /  10  10  10  10

&&

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

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

$$

97/




000
FXUS66 KPDT 302145
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PDT SUN AUG 30 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

.LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. A SYSTEM WILL EXIT THE REGION WITH DECREASING
CLOUDS IN ITS WAKE. WINDS 10-20 KTS WITH HIGHER GUSTS WILL DECREASE
TO 10 KTS OR BELOW OVERNIGHT. THE WIND WILL INCREASE AGAIN DURING
THE AFTERNOON TO GENERALLY LESS THAN 15 KTS. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  79  51  80 /   0  10   0  10
ALW  56  80  57  81 /   0  10   0  10
PSC  55  82  55  82 /   0  10   0  10
YKM  53  76  48  76 /  10  10  10  10
HRI  52  82  52  83 /   0  10   0  10
ELN  53  74  52  74 /  10  20  20  20
RDM  39  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  46  80  47  81 /  10  10   0   0
DLS  57  79  59  78 /  10  10  10  10

&&

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

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

$$

90/81/81




000
FXUS66 KPDT 302145
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PDT SUN AUG 30 2015

.SHORT TERM...TONIGHT THROUGH WEDNESDAY...THE DISTURBANCE THAT HAS
BROUGHT VARYING AMOUNTS OF SHOWERS TO THE REGION TODAY WILL EXIT THE
AREA EARLY EVENING. THUS WILL SEE AN END TO THE SHOWERS OVER MUCH OF
THE AREA BY SUNSET, THOUGH A FEW SHOWERS SHOULD LINGER NEAR THE
CASCADE CREST AND OVER EASTERN WALLOWA COUNTY THROUGH THE EVENING.
BREEZY WINDS WILL KICK UP SOME LOCAL BLOWING DUST IN THE LOWER BASIN
OF WASHINGTON THROUGH THE REMAINDER OF THIS AFTERNOON. A BROAD UPPER
LEVEL TROUGH WILL REMAIN OVER WESTERN CANADA AND THE PACIFIC
NORTHWEST THROUGH TUESDAY. THIS TROUGH WILL KEEP A PERSISTENT
ONSHORE FLOW OVER THE REGION THROUGH TUESDAY. THIS FLOW WILL ALLOW
ISOLATED TO SCATTERED SHOWERS TO SLOP OVER FROM WESTERN WASHINGTON
INTO THE WASHINGTON CASCADE EAST SLOPES. OTHERWISE CONDITIONS WILL
BE DRY THROUGH TUESDAY. ANOTHER SYSTEM WILL SWING THROUGH THE TROUGH
AND BRING CHANCES OF SHOWERS TO A LARGER PORTION OF THE AREA OF
WEDNESDAY. HIGH TEMPS WILL BE SLIGHTLY BELOW SEASONAL MONDAY AND
TUESDAY, BUT WILL FALL 8 TO 10 DEGREES ON WEDNESDAY. OVERNIGHT LOWS
WILL RUN NEAR SEASONAL VALUES. 90

.LONG TERM...WEDNESDAY NIGHT THROUGH SATURDAY...MODELS IN GOOD
AGREEMENT IN KEEPING AN UNSETTLED PATTERN OVER THE PACIFIC
NORTHWEST. AT THIS TIME...IT APPEARS THE BEST CHANCE OF
PRECIPITATION WILL BE WEDNESDAY NIGHT AND FRIDAY AFTERNOON.
NORTHWEST FLOW DEVELOPS BEHIND THE SYSTEM ON FRIDAY AND RESULTS IN A
DRYING TREND FOR MUCH OF THE AREA FRIDAY NIGHT AND SATURDAY.
TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY BELOW NORMAL THROUGH THE
PERIOD. EARLE

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. A SYSTEM WILL EXIT THE REGION WITH DECREASING
CLOUDS IN ITS WAKE. WINDS 10-20 KTS WITH HIGHER GUSTS WILL DECREASE
TO 10 KTS OR BELOW OVERNIGHT. THE WIND WILL INCREASE AGAIN DURING
THE AFTERNOON TO GENERALLY LESS THAN 15 KTS. EARLE

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  49  79  51  80 /   0  10   0  10
ALW  56  80  57  81 /   0  10   0  10
PSC  55  82  55  82 /   0  10   0  10
YKM  53  76  48  76 /  10  10  10  10
HRI  52  82  52  83 /   0  10   0  10
ELN  53  74  52  74 /  10  20  20  20
RDM  39  78  41  79 /  10  10   0   0
LGD  47  78  47  80 /  10  10   0   0
GCD  46  80  47  81 /  10  10   0   0
DLS  57  79  59  78 /  10  10  10  10

&&

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

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

$$

90/81/81





000
FXUS66 KPDT 301705 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1005 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...AN UPPER TROUGH CONTINUES TO MOVE
INTO THE PACIFIC NORTHWEST THIS MORNING. THE AXIS OF THE TROUGH
CURRENTLY RUNS THROUGH WESTERN WASHINGTON AND WESTERN OREGON. THIS
AXIS WILL SWING ACROSS THE INTERIOR NORTHWEST LATE THIS MORNING AND
THIS AFTERNOON. AN EARLIER BAND OF SHOWERS HAS LIFTED NORTHEAST INTO
NORTHEAST WASHINGTON, MEANWHILE ANOTHER BAND IS NOW FORMING FROM
CENTRAL WASHINGTON TO CENTRAL OREGON. AT THIS TIME PRECIP HAS BEEN
SPOTTY WITHIN THIS NEW BAND. STILL EXPECT THIS NEW BAND TO BECOME
MORE CONSOLIDATED AS IT MOVES INTO THE BLUE MOUNTAINS AND THE BLUE
MOUNTAIN FOOTHILLS DUE TO UPSLOPE AFFECTS. THIS PRECIP SHOULD
PERSIST OVER THE BLUES EAST TO WALLOWA COUNTY THIS AFTERNOON. THERE
STILL COULD BE ENOUGH INSTABILITY FOR A STRAY THUNDERSTORM FROM THE
BLUE MOUNTAINS EASTWARD, AND EXTREME SOUTHEAST WASHINGTON THIS
AFTERNOON. PRECIP CONTINUES TO SPILL INTO THE CASCADE EAST SLOPES AS
A BAND OF MOISTURE ASSOCIATED WITH THE TROUGH AXIS MOVES EAST. THE
BACK EDGE OF THIS PRECIP WILL PASS THROUGH THE CASCADE EAST SLOPES
WITHIN NEXT HOUR OR TWO. COOL AIR ALOFT WILL CAUSE SCATTERED SHOWERS
TO DEVELOP THIS AFTERNOON OVER THE CASCADE EAST SLOPES. MORNING
UPDATES INVOLVED ADJUSTING PRECIP CHANCES AND AMOUNTS BASED ON
LATEST TRENDS. 90

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. ANOTHER WEAK DISTURBANCE WILL MOVE ACROSS THE
AREA TODAY PRODUCING BRIEF LIGHT RAIN. CEILINGS WILL STAY ABOVE
MVFR.  WINDS WILL GENERALLY INCREASE TO 15-25 KTS WITH HIGHER GUSTS
BEHIND THE SYSTEM BUT ARE EXPECTED TO DECREASE TO 10 KTS OR BELOW
OVERNIGHT. EARLE

.LONG TERM...PREVIOUS DISCUSSION...AN UPPER LEVEL TROUGH WILL REMAIN
OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST OF THE LONG
TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER. TUESDAY NIGHT
AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND WILL DRAG A FRONT
THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN SHOWERS WILL BE
CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY A SLIGHT CHANCE
OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT FOR THE
WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY. ON
THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  60  10  10   0
ALW  73  56  78  59 /  60  10  10   0
PSC  76  56  81  55 /  50  10  10   0
YKM  74  48  73  47 /  30  10  10  10
HRI  76  53  80  55 /  60  10  10   0
ELN  71  50  74  50 /  40  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  40  10  10   0
DLS  73  56  80  60 /  50  10  10  10

&&

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

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

$$

90/83/81




000
FXUS66 KPDT 301705 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
1005 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...MORNING UPDATE...AN UPPER TROUGH CONTINUES TO MOVE
INTO THE PACIFIC NORTHWEST THIS MORNING. THE AXIS OF THE TROUGH
CURRENTLY RUNS THROUGH WESTERN WASHINGTON AND WESTERN OREGON. THIS
AXIS WILL SWING ACROSS THE INTERIOR NORTHWEST LATE THIS MORNING AND
THIS AFTERNOON. AN EARLIER BAND OF SHOWERS HAS LIFTED NORTHEAST INTO
NORTHEAST WASHINGTON, MEANWHILE ANOTHER BAND IS NOW FORMING FROM
CENTRAL WASHINGTON TO CENTRAL OREGON. AT THIS TIME PRECIP HAS BEEN
SPOTTY WITHIN THIS NEW BAND. STILL EXPECT THIS NEW BAND TO BECOME
MORE CONSOLIDATED AS IT MOVES INTO THE BLUE MOUNTAINS AND THE BLUE
MOUNTAIN FOOTHILLS DUE TO UPSLOPE AFFECTS. THIS PRECIP SHOULD
PERSIST OVER THE BLUES EAST TO WALLOWA COUNTY THIS AFTERNOON. THERE
STILL COULD BE ENOUGH INSTABILITY FOR A STRAY THUNDERSTORM FROM THE
BLUE MOUNTAINS EASTWARD, AND EXTREME SOUTHEAST WASHINGTON THIS
AFTERNOON. PRECIP CONTINUES TO SPILL INTO THE CASCADE EAST SLOPES AS
A BAND OF MOISTURE ASSOCIATED WITH THE TROUGH AXIS MOVES EAST. THE
BACK EDGE OF THIS PRECIP WILL PASS THROUGH THE CASCADE EAST SLOPES
WITHIN NEXT HOUR OR TWO. COOL AIR ALOFT WILL CAUSE SCATTERED SHOWERS
TO DEVELOP THIS AFTERNOON OVER THE CASCADE EAST SLOPES. MORNING
UPDATES INVOLVED ADJUSTING PRECIP CHANCES AND AMOUNTS BASED ON
LATEST TRENDS. 90

.AVIATION...18Z TAFS...VFR CONDITIONS WILL CONTINUE AT ALL TAF SITES
FOR THE NEXT 24 HOURS. ANOTHER WEAK DISTURBANCE WILL MOVE ACROSS THE
AREA TODAY PRODUCING BRIEF LIGHT RAIN. CEILINGS WILL STAY ABOVE
MVFR.  WINDS WILL GENERALLY INCREASE TO 15-25 KTS WITH HIGHER GUSTS
BEHIND THE SYSTEM BUT ARE EXPECTED TO DECREASE TO 10 KTS OR BELOW
OVERNIGHT. EARLE

.LONG TERM...PREVIOUS DISCUSSION...AN UPPER LEVEL TROUGH WILL REMAIN
OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST OF THE LONG
TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER. TUESDAY NIGHT
AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND WILL DRAG A FRONT
THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN SHOWERS WILL BE
CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY A SLIGHT CHANCE
OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT FOR THE
WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY. ON
THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  60  10  10   0
ALW  73  56  78  59 /  60  10  10   0
PSC  76  56  81  55 /  50  10  10   0
YKM  74  48  73  47 /  30  10  10  10
HRI  76  53  80  55 /  60  10  10   0
ELN  71  50  74  50 /  40  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  40  10  10   0
DLS  73  56  80  60 /  50  10  10  10

&&

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

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

$$

90/83/81




000
FXUS66 KPDT 301629
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
929 AM PDT SUN AUG 30 2015

.SHORT TERM...MORNING UPDATE...AN UPPER TROUGH CONTINUES TO MOVE
INTO THE PACIFIC NORTHWEST THIS MORNING. THE AXIS OF THE TROUGH
CURRENTLY RUNS THROUGH WESTERN WASHINGTON AND WESTERN OREGON. THIS
AXIS WILL SWING ACROSS THE INTERIOR NORTHWEST LATE THIS MORNING AND
THIS AFTERNOON. AN EARLIER BAND OF SHOWERS HAS LIFTED NORTHEAST INTO
NORTHEAST WASHINGTON, MEANWHILE ANOTHER BAND IS NOW FORMING FROM
CENTRAL WASHINGTON TO CENTRAL OREGON. AT THIS TIME PRECIP HAS BEEN
SPOTTY WITHIN THIS NEW BAND. STILL EXPECT THIS NEW BAND TO BECOME
MORE CONSOLIDATED AS IT MOVES INTO THE BLUE MOUNTAINS AND THE BLUE
MOUNTAIN FOOTHILLS DUE TO UPSLOPE AFFECTS. THIS PRECIP SHOULD
PERSIST OVER THE BLUES EAST TO WALLOWA COUNTY THIS AFTERNOON. THERE
STILL COULD BE ENOUGH INSTABILITY FOR A STRAY THUNDERSTORM FROM THE
BLUE MOUNTAINS EASTWARD, AND EXTREME SOUTHEAST WASHINGTON THIS
AFTERNOON. PRECIP CONTINUES TO SPILL INTO THE CASCADE EAST SLOPES AS
A BAND OF MOISTURE ASSOCIATED WITH THE TROUGH AXIS MOVES EAST. THE
BACK EDGE OF THIS PRECIP WILL PASS THROUGH THE CASCADE EAST SLOPES
WITHIN NEXT HOUR OR TWO. COOL AIR ALOFT WILL CAUSE SCATTERED SHOWERS
TO DEVELOP THIS AFTERNOON OVER THE CASCADE EAST SLOPES. MORNING
UPDATES INVOLVED ADJUSTING PRECIP CHANCES AND AMOUNTS BASED ON
LATEST TRENDS. 90

.LONG TERM...PREVIOUS DISCUSSION...AN UPPER LEVEL TROUGH WILL REMAIN
OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST OF THE LONG
TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER. TUESDAY NIGHT
AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND WILL DRAG A FRONT
THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN SHOWERS WILL BE
CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY A SLIGHT CHANCE
OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT FOR THE
WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY. ON
THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS WILL BE
PREVALENT AT ALL TAF SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING
THE AREA WILL BRING RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN
THE WESTERN TAF SITES AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS
ARE EXPECTED TO REMAIN BKN TO OVC ABOVE 5000 FEET AGL
TODAY...PERHAPS AS LOW AS 4000 FEET AGL AT KBDN AND KALW. MVFR
CONDITIONS ARE POSSIBLE WITH THE HEAVIER RAIN BANDS. ISOLATED
THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS OF NORTHEAST OREGON
AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE TO THE LOW
PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT HAVE ENOUGH
CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER 00Z SKIES
WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW MORNING.
WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS TO 30
KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  60  10  10   0
ALW  73  56  78  59 /  60  10  10   0
PSC  76  56  81  55 /  50  10  10   0
YKM  74  48  73  47 /  30  10  10  10
HRI  76  53  80  55 /  60  10  10   0
ELN  71  50  74  50 /  40  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  40  10  10   0
DLS  73  56  80  60 /  50  10  10  10

&&

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

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

$$

90/83/81




000
FXUS66 KPDT 301629
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
929 AM PDT SUN AUG 30 2015

.SHORT TERM...MORNING UPDATE...AN UPPER TROUGH CONTINUES TO MOVE
INTO THE PACIFIC NORTHWEST THIS MORNING. THE AXIS OF THE TROUGH
CURRENTLY RUNS THROUGH WESTERN WASHINGTON AND WESTERN OREGON. THIS
AXIS WILL SWING ACROSS THE INTERIOR NORTHWEST LATE THIS MORNING AND
THIS AFTERNOON. AN EARLIER BAND OF SHOWERS HAS LIFTED NORTHEAST INTO
NORTHEAST WASHINGTON, MEANWHILE ANOTHER BAND IS NOW FORMING FROM
CENTRAL WASHINGTON TO CENTRAL OREGON. AT THIS TIME PRECIP HAS BEEN
SPOTTY WITHIN THIS NEW BAND. STILL EXPECT THIS NEW BAND TO BECOME
MORE CONSOLIDATED AS IT MOVES INTO THE BLUE MOUNTAINS AND THE BLUE
MOUNTAIN FOOTHILLS DUE TO UPSLOPE AFFECTS. THIS PRECIP SHOULD
PERSIST OVER THE BLUES EAST TO WALLOWA COUNTY THIS AFTERNOON. THERE
STILL COULD BE ENOUGH INSTABILITY FOR A STRAY THUNDERSTORM FROM THE
BLUE MOUNTAINS EASTWARD, AND EXTREME SOUTHEAST WASHINGTON THIS
AFTERNOON. PRECIP CONTINUES TO SPILL INTO THE CASCADE EAST SLOPES AS
A BAND OF MOISTURE ASSOCIATED WITH THE TROUGH AXIS MOVES EAST. THE
BACK EDGE OF THIS PRECIP WILL PASS THROUGH THE CASCADE EAST SLOPES
WITHIN NEXT HOUR OR TWO. COOL AIR ALOFT WILL CAUSE SCATTERED SHOWERS
TO DEVELOP THIS AFTERNOON OVER THE CASCADE EAST SLOPES. MORNING
UPDATES INVOLVED ADJUSTING PRECIP CHANCES AND AMOUNTS BASED ON
LATEST TRENDS. 90

.LONG TERM...PREVIOUS DISCUSSION...AN UPPER LEVEL TROUGH WILL REMAIN
OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST OF THE LONG
TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER. TUESDAY NIGHT
AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND WILL DRAG A FRONT
THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN SHOWERS WILL BE
CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY A SLIGHT CHANCE
OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT FOR THE
WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY. ON
THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY.

&&

.AVIATION...PREVIOUS DISCUSSION...12Z TAFS...VFR CONDITIONS WILL BE
PREVALENT AT ALL TAF SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING
THE AREA WILL BRING RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN
THE WESTERN TAF SITES AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS
ARE EXPECTED TO REMAIN BKN TO OVC ABOVE 5000 FEET AGL
TODAY...PERHAPS AS LOW AS 4000 FEET AGL AT KBDN AND KALW. MVFR
CONDITIONS ARE POSSIBLE WITH THE HEAVIER RAIN BANDS. ISOLATED
THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS OF NORTHEAST OREGON
AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE TO THE LOW
PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT HAVE ENOUGH
CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER 00Z SKIES
WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW MORNING.
WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS TO 30
KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY 05Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  60  10  10   0
ALW  73  56  78  59 /  60  10  10   0
PSC  76  56  81  55 /  50  10  10   0
YKM  74  48  73  47 /  30  10  10  10
HRI  76  53  80  55 /  60  10  10   0
ELN  71  50  74  50 /  40  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  40  10  10   0
DLS  73  56  80  60 /  50  10  10  10

&&

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

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

$$

90/83/81





000
FXUS66 KPDT 301158 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
458 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT AT ALL TAF
SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING THE AREA WILL BRING
RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN THE WESTERN TAF SITES
AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS ARE EXPECTED TO REMAIN
BKN TO OVC ABOVE 5000 FEET AGL TODAY...PERHAPS AS LOW AS 4000 FEET
AGL AT KBDN AND KALW. MVFR CONDITIONS ARE POSSIBLE WITH THE HEAVIER
RAIN BANDS. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS
OF NORTHEAST OREGON AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE
TO THE LOW PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT
HAVE ENOUGH CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER
00Z SKIES WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW
MORNING. WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS
TO 30 KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY
05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83




000
FXUS66 KPDT 301158 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
458 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT AT ALL TAF
SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING THE AREA WILL BRING
RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN THE WESTERN TAF SITES
AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS ARE EXPECTED TO REMAIN
BKN TO OVC ABOVE 5000 FEET AGL TODAY...PERHAPS AS LOW AS 4000 FEET
AGL AT KBDN AND KALW. MVFR CONDITIONS ARE POSSIBLE WITH THE HEAVIER
RAIN BANDS. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS
OF NORTHEAST OREGON AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE
TO THE LOW PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT
HAVE ENOUGH CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER
00Z SKIES WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW
MORNING. WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS
TO 30 KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY
05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83





000
FXUS66 KPDT 301158 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
458 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT AT ALL TAF
SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING THE AREA WILL BRING
RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN THE WESTERN TAF SITES
AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS ARE EXPECTED TO REMAIN
BKN TO OVC ABOVE 5000 FEET AGL TODAY...PERHAPS AS LOW AS 4000 FEET
AGL AT KBDN AND KALW. MVFR CONDITIONS ARE POSSIBLE WITH THE HEAVIER
RAIN BANDS. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS
OF NORTHEAST OREGON AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE
TO THE LOW PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT
HAVE ENOUGH CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER
00Z SKIES WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW
MORNING. WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS
TO 30 KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY
05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83





000
FXUS66 KPDT 301158 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
458 AM PDT SUN AUG 30 2015

UPDATED AVIATION DISCUSSION

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...12Z TAFS...VFR CONDITIONS WILL BE PREVALENT AT ALL TAF
SITES FOR THE NEXT 24 HOURS. A SYSTEM CROSSING THE AREA WILL BRING
RAIN TO THE AREA THIS MORNING ENDING BY 20Z IN THE WESTERN TAF SITES
AND BY 23Z AT KPSC, KALW AND KPDT. CEILINGS ARE EXPECTED TO REMAIN
BKN TO OVC ABOVE 5000 FEET AGL TODAY...PERHAPS AS LOW AS 4000 FEET
AGL AT KBDN AND KALW. MVFR CONDITIONS ARE POSSIBLE WITH THE HEAVIER
RAIN BANDS. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS
OF NORTHEAST OREGON AND POSSIBLY KALW AND KPDT FROM 18Z TO 23Z. DUE
TO THE LOW PROBABILITY OF THIS HAPPENING AT KALW AND KPDT, DID NOT
HAVE ENOUGH CONFIDENCE TO INCLUDE THUNDERSTORMS IN THOSE TAFS. AFTER
00Z SKIES WILL BECOME SCATTERED ABOVE 6000 FEET AGL THROUGH TOMORROW
MORNING. WINDS WILL INCREASE THIS MORNING TO 10 TO 20 KTS WITH GUSTS
TO 30 KTS. WINDS WILL DECREASE AFTER 00Z AND DROP BELOW 15 KTS BY
05Z. PERRY

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83




000
FXUS66 KPDT 301000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SUN AUG 30 2015

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...VFR CONDITIONS WILL
PERSIST AT ALL TAF SITES UNTIL 08Z WHEN A STORM SYSTEM ENTERS THE
PACIFIC NORTHWEST AND SPREADS CLOUDS AND SHOWERS CREATING AREAS OF
MVFR CONDITIONS AT ALL TAF SITES BEGINNING WITH KDLS AND KYKM.
AROUND 10Z AREAS OF MVFR CONDITIONS SHOULD BEGIN AROUND TAF SITES
KPSC...KPDT...KALW...KRDM...AND KBDN ESPECIALLY IN RAIN SHOWERS.
AFTER 02Z THE CONDITIONS SHOULD SLOWLY IMPROVE TOWARD VFR CONDITIONS
FROM WEST TO EAST.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83




000
FXUS66 KPDT 301000
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
300 AM PDT SUN AUG 30 2015

.SHORT TERM...TODAY THROUGH TUESDAY...POTENT UPPER LEVEL TROUGH WILL
MOVE ACROSS THE FORECAST AREA TODAY. BAROCLINIC BAND OF RAIN/SHOWERS
WILL SPREAD ACROSS THE FORECAST AREA THIS MORNING BRINGING A GENERAL
LIGHT RAINFALL. THIS WILL BE FOLLOWED BY THE UPPER VORT MAX AND
ASSOCIATED SHOWERS AND POSSIBLE THUNDERSTORMS. HAVE INCLUDED A
SLIGHT CHANCE OF THUNDERSTORMS FROM 18Z TO 00Z TODAY FOR THE BLUE
MOUNTAIN FOOTHILLS EASTWARD TO THE IDAHO BORDER. INSTABILITY WILL BE
MARGINAL BUT THE FORCING WILL BE QUITE STRONG. CONDITIONS QUICKLY
IMPROVE THIS EVENING WITH PRECIPITATION ENDING EXCEPT NEAR THE
WASHINGTON CASCADE CREST. FOR MONDAY THROUGH TUESDAY EXPECT
GENERALLY FAIR CONDITIONS AND COOL TEMPERATURES. THERE WILL BE A
CHANCE OF SHOWERS ALONG THE WASHINGTON CASCADE CREST...ELSEWHERE
JUST A FEW FEW CLOUDS. HIGHS IN THE LOWER ELEVATIONS WILL BE IN THE
MID 70S TO LOWER 80S WITH 60S TO LOWER 70S MOUNTAINS. LOWS WILL BE
IN THE UPPER 40S TO MID 50S LOWLANDS WITH 30S TO LOWER 40S
MOUNTAINS. 78

.LONG TERM...TUESDAY NIGHT THROUGH SUNDAY..AN UPPER LEVEL TROUGH
WILL REMAIN OVER BRITISH COLUMBIA AND THE PACIFIC NORTHWEST FOR MOST
OF THE LONG TERM PERIOD AND GIVE US CONTINUED UNSETTLED WEATHER.
TUESDAY NIGHT AN UPPER LOW WILL BE MOVING THROUGH THE TROUGH AND
WILL DRAG A FRONT THROUGH THE AREA. IN THE EVENING A CHANCE OF RAIN
SHOWERS WILL BE CONFINED TO THE CASCADES BUT OVERNIGHT AND THURSDAY
A SLIGHT CHANCE OF RAIN SHOWERS WILL EXPAND ACROSS THE AREA EXCEPT
FOR THE WASHINGTON COLUMBIA BASIN WHICH WILL REMAIN PRIMARILY DRY.
ON THURSDAY, ANOTHER WAVE WILL MOVE THROUGH THE TROUGH WITH A SLIGHT
CHANCE OF SHOWERS IN AND NEAR THE CASCADES, THE BLUE MOUNTAIN
FOOTHILLS AND THE EASTERN MOUNTAINS. MODELS HINT AT SOME INSTABILITY
SO HAVE ADDED A SLIGHT CHANCE OF THUNDERSTORMS ALONG THE HIGHER
TERRAIN FROM THE OCHOCO-JOHN HIGHLANDS TO WALLOWA COUNTY. BY FRIDAY
THE TROUGH SHIFTS A LITTLE NORTH  AND ON SATURDAY A LITTLE TO THE
EAST AND A SLIGHT CHANCE OF SHOWERS WILL BE CONFINED TO THE
WASHINGTON CASCADES, THE NORTHERN BLUE MOUNTAINS AND WALLOWA COUNTY
EACH DAY. ON SUNDAY MODELS SHOW THE TROUGH FINALLY MOVING TO THE
ROCKIES AND OUT OF OUR AREA. THERE WILL BE SOME WEAK TRANSITORY
RIDGING AHEAD OF AN UPPER LOW DROPPING SOUTH FROM THE GULF OF
ALASKA. THIS WILL GIVE THE AREA FAIR WEATHER ON SUNDAY. WEDNESDAY
AND THURSDAY WILL HAVE TEMPERATURES IN THE LOWER TO MID 70S WITH
MAINLY 60S IN THE MOUNTAINS. FRIDAY THROUGH SUNDAY WILL SEE A
GRADUAL WARMING TREND WITH HIGHS IN THE UPPER 70S TO THE MID 80S
WITH MID 70S TO LOWER 80S IN THE MOUNTAINS BY SUNDAY. PERRY

&&

.AVIATION...PREVIOUS DISCUSSION...06Z TAFS...VFR CONDITIONS WILL
PERSIST AT ALL TAF SITES UNTIL 08Z WHEN A STORM SYSTEM ENTERS THE
PACIFIC NORTHWEST AND SPREADS CLOUDS AND SHOWERS CREATING AREAS OF
MVFR CONDITIONS AT ALL TAF SITES BEGINNING WITH KDLS AND KYKM.
AROUND 10Z AREAS OF MVFR CONDITIONS SHOULD BEGIN AROUND TAF SITES
KPSC...KPDT...KALW...KRDM...AND KBDN ESPECIALLY IN RAIN SHOWERS.
AFTER 02Z THE CONDITIONS SHOULD SLOWLY IMPROVE TOWARD VFR CONDITIONS
FROM WEST TO EAST.


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  71  52  77  54 /  70  10  10   0
ALW  73  56  78  59 /  70  10  10   0
PSC  76  56  81  55 /  70  10  10   0
YKM  72  48  73  47 /  40  10  10  10
HRI  76  53  80  55 /  70  10  10   0
ELN  68  50  74  50 /  50  10  20  20
RDM  65  40  77  42 /  60  10  10   0
LGD  66  46  78  47 /  60  10  10   0
GCD  67  37  81  39 /  50  10  10   0
DLS  73  56  80  60 /  70  10  10  10

&&

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

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

$$

78/83/83





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