463
FXUS66 KPDT 052250
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
250 PM PST WED NOV 5 2025
DISCUSSION
A WARM FRONT/TROUGH/COLD FRONTAL SURFACE PATTERN WAS POSITIONED
PRETTY MUCH RIGHT OVER THE PDT FORECAST AREA BY LATE MORNING. THE
REGIONAL MESOANALYSIS SHOWED A THE BEST PRECIPITATION PLACEMENT
OVER OUR EASTERN WASHINGTON COUNTIES (NEAREST THE WARM FRONT) AND
BEST 925-850 MOISTURE ADVECTION FROM THE SOUTHWEST AND IMPINGING
ON THE CASCADE CRESTS.
DOWNSLOPING WINDS OFF THE WALLOWAS WERE CREATING VERY STRONG TO
HIGH WIND GUSTS ACROSS THE WALLOWA VALLEY VERY LATE THIS MORNING,
KJSY HAD AN ISOLATED GUST TO 76 MPH, HOWEVER THE CLOSER OBS WERE
ALSO SHOWING ROBUST GUSTS IN THE 50-58 MPH RANGE. A WIND ADVISORY
IS IN PLACE FOR WALLOWA COUNTY THROUGH 4 PM AND WILL BE REASSESSED
THIS AFTERNOON FOR A POTENTIAL EXTENSION IN TIME. CAPE OVERALL IS
WEAK HOWEVER, FORECAST OF SURFACE BASED CAPE GETS UP TO A FEW
HUNDRED (250-400) J/KG ACROSS THE OREGON COLUMBIA BASINS AND
EASTERN MOUNTAINS THIS AFTERNOON. WITH COMBINATION OF
LIFT/CONVERGENCE, THE POSSIBILITY OF ISOLATED THUNDERSTORMS CANNOT
BE RULED OUT, AND THOSE CHANCES ARE MAXIMIZED ALONG THE CASCADE
CRESTS AND THE BASE OF THE NORTHERN BLUES AND CENTERED KIND OF
NEAR WALLA WALLA (10-25 %).
CHANCES FOR RAIN CONTINUE THROUGH THE END OF THE WEEK ESPECIALLY
FOR THE HIGHER ELEVATIONS AREAS. CHANCES WILL DIMINISH ACROSS THE
COLUMBIA BASIN AND CENTRAL OREGON ON THURSDAY (30 DOWN TO 10
PERCENT FOR THURSDAY MORNING AND AFTERNOON, REBOUNDING WITH THE
NEXT IMPULSE THURSDAY EVENING AS PRECIPITATION CHANCES RAMP BACK
UP TO 90% WEST TO EAST THURSDAY NIGHT THROUGH THE FIRST HALF OF
FRIDAY. FRIDAY EVENING AND OVERNIGHT, WILL BE THE DRYING OUT
PERIOD OF THE ENTIRE REGION, SETTING UP A DRY WEEKEND.
SNOW CHANCES ARE A LITTLE MORE FAVORABLE THURSDAY NIGHT AS THE
NBM SNOW LEVELS ARE COMING IN AROUND 4500 FT AGL ON AVERAGE
OVERNIGHT, AND EVEN LOWER IN THE 3500+ FT AGL AREA ALONG THE
WASHINGTON CASCADES SLOPES/KITTITAS VALLEY. SOME SNOW ACCUMS
APPEAR POSSIBLE ON THE TOPS OF THE WALLOWAS THURSDAY NIGHT, AS
WELL AS THE CASCADES, HOWEVER THE SYSTEM STILL LOOKS TOO WARM FOR
ANYTHING MORE THAN WINTER DRIVING CONDITIONS ALONG THE PASSES
I.E. (MINOR IMPACTS, A FEW INCONVENIENCES TO DAILY LIFE, USING
CAUTION WHILE DRIVING).
PREV DISCUSSION
/ISSUED 932 AM PST WED NOV 5 2025/
UPDATED AVIATION DISCUSSION...
AVIATION...KDLS/KPSC WILL BE IN MVFR UNTIL THIS LATE MORNING
WITH KYKM JOINING IN THROUGH THIS AFTERNOON. OTHERWISE, THE
REMAINING SITES WILL BE IN VFR FOR THIS PERIOD. THIS SYSTEM WILL
BRING MORE RAIN SHOWERS WITH ADDITIONAL MOISTURE FROM THE
ATMOSPHERIC RIVER FOR KDLS/KRDM/KBDN/KYKM/KALW BETWEEN THIS
MORNING AND EVENING HOURS. BREEZY TO WINDY CONDITIONS WILL
PREVAIL ACROSS MOST SITES IN THE AFTERNOON THROUGH EVENING WITH
SUSTAINED WINDS OF 12-20KTS AND GUSTS AT 20-30KTS EXCEPT KDLS.
THUNDERSTORMS COULD DEVELOP AS WELL IN LATER AFTERNOON HOURS, BUT
WAS NOT CONFIDENT ENOUGH (<20%) TO MENTION IN THE TAFS. FEASTER/97
PRELIMINARY POINT TEMPS/POPS
PDT 43 63 41 56 / 50 50 90 40
ALW 47 61 44 55 / 60 60 100 50
PSC 43 62 41 58 / 40 40 80 10
YKM 38 57 36 56 / 60 70 80 10
HRI 43 63 43 58 / 40 40 80 20
ELN 34 52 33 51 / 70 80 90 20
RDM 37 59 35 53 / 60 50 90 20
LGD 40 57 39 51 / 70 70 100 70
GCD 40 57 41 52 / 60 50 100 40
DLS 46 60 44 57 / 90 90 100 50
PDT WATCHES/WARNINGS/ADVISORIES
OR...WIND ADVISORY UNTIL 4 PM PST THIS AFTERNOON FOR ORZ050.
WA...NONE.
SHORT TERM...71
LONG TERM....71
AVIATION...99
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