Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 230545 AAA
AFDPDT

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE PENDLETON OR
944 PM PST SAT NOV 22 2014

UPDATED AVIATION DISCUSSION

.SHORT TERM...EVENING UPDATE...A COLD FRONT MOVED THROUGH THE AREA
LATE THIS AFTERNOON. THIS FRONT CAUSED SHOWERS OVER THE AREA WITH
THE BEST SHOWERS NEAR THE CASCADES AND OVER THE BLUE MOUNTAINS AND
THE BLUE MOUNTAIN FOOTHILLS. THIS FRONT ALSO KICKED WINDS UP AT A
NUMBER OF LOCATIONS. MOST LOCATIONS WITH INCREASED WINDS HAVE SEEN
15 TO 25 MPH, THE ONE EXCEPTION HAS BEEN THE RIDGE JUST WEST OF
PENDLETON WHERE WINDS HAVE BEEN RUNNING 25 TO 35 MPH WITH HIGHER
GUSTS. WINDS ACROSS THE AREA HAVE DECREASED OR ARE DECREASING. THE
WINDS AT THE PENDLETON AIRPORT (ON THE PREVIOUSLY MENTIONED RIDGE)
WILL GRADUALLY DECREASE BUT WILL REMAIN RATHER BLUSTERY INTO EARLY
SUNDAY MORNING. WESTERLY FLOW HAS KEPT A FEW SHOWERS GOING NEAR THE
CASCADE CREST THROUGH THE EVENING, BUT SHOWERS HAVE LARGELY ENDED
ELSEWHERE. THE ONSHORE FLOW WILL KEEP SHOWERS GOING THROUGH THE
NIGHT NEAR THE CASCADES AND MAY CAUSE RENEWED SHOWERS OVER THE
INTERIOR MOUNTAINS OVERNIGHT. THE NEXT IN A SERIES OF DISTURBANCES
WILL MOVE ACROSS THE AREA SUNDAY. THIS SYSTEM WILL BRING VARYING
CHANCES OF RAIN AND MOUNTAIN SNOW TO THE AREA. ALSO WINDS WILL
BECOME BREEZY AT A NUMBER OF LOCATIONS AGAIN IN THE AFTERNOON AND
EVENING DUE TO THIS SYSTEM. UPDATES INVOLVED MAKING ADJUSTMENTS TO
WINDS, PRECIP CHANCES, SNOW LEVELS AND AMOUNTS, AND MINOR TWEAKS TO
TEMPS THROUGH SUNDAY. 90

.LONG TERM...PREVIOUS DISCUSSION...THE 12Z ECMWF AND GFS HAVE COME
INTO MUCH BETTER AGREEMENT THROUGH THE LONG TERM PERIOD. RAIN AND
HIGH MOUNTAIN SNOW WILL AGAIN BE POSSIBLE MONDAY NIGHT AND
TUESDAY...ESPECIALLY TO THE NORTH. SOUTHWESTERLY WINDS WILL ALSO
INCREASE DURING THIS TIME AND DAYTIME TEMPERATURES WILL RISE INTO
THE 50S AS HIGH PRESSURE BUILDS FROM THE SOUTH. MUCH DRIER WEATHER
AND MILD TEMPERATURES CAN THEN BE EXPECTED TUESDAY NIGHT THROUGH
WEDNESDAY NIGHT WITH THE STORM TRACK REMAINING TO THE NORTH. THE
RIDGE WILL START TO BREAK DOWN ON THURSDAY AND THERE WILL BE A
CHANCE OF LIGHT RAIN AS WELL AS SLIGHTLY COOLER TEMPERATURES.
PERIODS OF RAIN AND MOUNTAIN SNOW WILL BE POSSIBLE ON FRIDAY AND
SATURDAY AS A DEEP PACIFIC LOW APPROACHES THE PACIFIC NORTHWEST.

&&

.AVIATION...06Z TAFS...VFR CONDITIONS EXPECTED AT ALL TAF SITES
THROUGH THE PERIOD. A STRONG WEST TO NORTHWEST FLOW ALOFT WILL
CONTINUE OVER THE AREA. THIS...IN COMBINATION WITH SEVERAL WEAK
DISTURBANCES WILL ACT TO BRING PERIODIC SCT TO BKN MID LEVEL CLOUD
DECKS TO MOST TAF SITES THROUGHOUT THE TAF PERIOD. A SLIGHTLY BETTER
DEFINED DISTURBANCE WILL TRY TO WORK ITS WAY THROUGH THE AREA AFTER
23/21Z...BRINGING SOME -SHRA TO AND INVOF MOST TAF SITES. WINDS WILL
REMAIN GUSTY AT KPDT THROUGH THE NIGHT BEFORE A SHORT BREAK FROM
23/15-19Z. WIND GUSTS ARE THEN FORECAST TO INCREASE AGAIN...REACHING
25 TO 30 KTS AFTER 23/19Z FOR KPDT...KALW..AND KPSC TAF SITES. 77

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  37  49  34  46 /  20  30  20  10
ALW  38  50  35  46 /  20  50  20  10
PSC  37  50  34  46 /  10  30  10  10
YKM  31  45  31  45 /  20  20  10  10
HRI  36  51  33  48 /  20  30  10  10
ELN  30  44  28  45 /  20  40  10  10
RDM  27  44  27  43 /  20  20  10  10
LGD  35  40  31  39 /  50  60  30  10
GCD  32  43  22  38 /  40  30  30  10
DLS  38  49  35  48 /  20  40  20  10

&&

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

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

$$

90/82/77





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