839
FXUS66 KPDT 120546
AFDPDT
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
946 PM PST TUE NOV 11 2025
UPDATED AVIATION...06Z TAFS
MOST SITES ARE CURRENTLY IN VFR
EXCEPT FOR KALW BEING IN LIFR DUE TO LOW CLOUDS AND FOG/MIST.
VSBYS AND/OR CIGS FOR KALW/KPSC MAY DROP TO MVFR CONDITIONS OR
LOWER FROM THE LOW CLOUDS AND/OR FOG/MIST. HOWEVER, THIS SHOULD
IMPROVE AROUND LATE WEDNESDAY MORNING (18Z). WILL CONTINUE
MONITORING TO SEE THE EXTENT OF THE FOG/MIST OVER KALW/KPSC AND
OTHER SITES, IF FURTHER MATERIALIZES THROUGH THE REST OF THIS
EVENING. WINDS WILL BE LESS THAN 10KTS. FEASTER/97
PREV DISCUSSION
/ISSUED 230 PM PST TUE NOV 11 2025/
DISCUSSION
CLEAR SKIES WITH SOME HIGH CLOUD BASES ENTERING THE
SOUTHERN PART OF THE CWA NEAR CENTRAL OR. MOST OF THE FOG WE
OBSERVED FROM EARLIER THIS MORNING HAS SINCE BEEN LIFTED. WE WILL
CONTINUE TO BE UNDER THE INFLUENCE OF A RIDGE OVER THE NEXT DAY,
THAT WILL CONTINUE OUR PATTERN OF DRY AND LIGHT CONDITIONS SAVE
FOR SOME MOUNTAIN RAIN SHOWERS OVER THE CASCADES. ABUNDANT UPPER
LEVEL MOISTURE COUPLED WITH THE INCREASES INFLUENCES OF AN
INCOMING TROUGH WILL BRING OVERCAST SKIES THROUGH THE NIGHT.
THOUGH I'M A LITTLE LESS CONFIDENT ON THE FOG TOMORROW MORNING
(10-15% CHANCE) GIVEN THE OVERCAST SKIES, BUT NONE THE LESS I
STILL PUT IN SOME AREAS OF PATCHY DUE TO LOW LEVEL CONFIDENCE, BUT
NOT EXPECTING IT TO BE AS WIDESPREAD AS WE SAW THIS MORNING.
AS WE HEAD INTO THURSDAY THROUGH FRIDAY, A STATIONARY FRONT WILL
INFLUENCE THE PATTERN AND INCREASE COVERAGE OF PRECIPITATION
THROUGH THE REGION. EVERY AREA BY LATE THURSDAY EVENING/EARLY
FRIDAY MORNING WILL SEE 40-60% CHANCES OF POP. THIS WILL MOSTLY BE
A RAIN EVENT, BUT SNOW SHOWERS LOOK TO DEVELOP IN THE CASCADES AND
PARTS OF THE EASTERN MOUNTAINS AS SNOW LEVELS DROP TO 4500 TO
5500 FEET WITH ACCUMULATION LOOKING TO TOP OF AT AROUND AN INCH
(50-70% CHANCE) IN THE HIGHEST CRESTS OF THE CASCADES. THINGS WILL
DRY OUT MOSTLY IN THE BASIN BY THE WEEKEND DUE TO A RIDGE
DEVELOPING AROUND THE TROUGH, CREATING A CUT OFF LOW IN SOUTHERN
CALIFORNIA THROUGH NEW MEXICO. ALTHOUGH THE BASIN WILL DRY OUT
THROUGH THE WEEKEND, INSTABILITY FROM THE CUT OFF LOW WILL BE JUST
ENOUGH TO ALLOW MOUNTAIN SNOW AND RAIN SHOWERS TO CONTINUE. ANY
SORT OF BREAK FROM THE PRECIPITATION WILL BE SHORT LIVED WITH
ANOTHER SHORTWAVE FORMING OFF THE COAST BY THE BEGINNING OF THE
WORK WEEK AND WILL CONTINUE THE WET PATTERN, ALONG WITH MOUNTAIN
SNOW SHOWERS AT 5000 TO 6000 FEET.
PRELIMINARY POINT TEMPS/POPS
PDT 39 56 41 63 / 0 0 10 60
ALW 42 54 44 62 / 10 10 10 60
PSC 37 54 37 57 / 10 10 10 50
YKM 39 54 39 56 / 10 10 20 70
HRI 40 54 40 58 / 0 0 10 50
ELN 36 51 36 53 / 20 20 30 80
RDM 40 64 44 63 / 0 0 10 50
LGD 44 62 47 63 / 0 0 0 60
GCD 43 66 47 66 / 0 0 10 60
DLS 45 56 45 57 / 10 10 40 90
PDT WATCHES/WARNINGS/ADVISORIES
OR...NONE.
WA...NONE.
SHORT TERM...95
LONG TERM....95
AVIATION...97
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