Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 221135 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
435 AM PDT WED OCT 22 2014

UPDATED AVIATION

.SHORT TERM...TODAY THROUGH FRIDAY...A LARGE UPPER LEVEL LOW AND
STRONG JET WILL IMPACT THE PACIFIC NORTHWEST FOR THE NEXT FEW DAYS.
A COLD FRONT IS MOVING ONSHORE THIS MORNING. HIS FRONT WILL BE VERY
SLOW TO MOVE EASTWARD BUT PRECIPITATION AHEAD OF THE FRONT HAS
STARTED EAST OF THE CASCADES. THE STRONG SOUTHWEST FLOW COMBINED
WITH DEEP MOISTURE WILL BRING HEAVY RAIN TO THE CASCADES TODAY.
LIGHTER RAIN IS EXPECTED FURTHER EAST FROM THE CASCADES. THE FRONTAL
BOUNDARY AND STEADY RAIN WILL MOVE SOUTHEAST ACROSS THE FORECAST
AREA TONIGHT. RAIN SHADOWING WILL DECREASE THE THE PRECIPITATION
THURSDAY ACROSS THE COLUMBIA BASIN WHILE OROGRAPHIC EFFECTS WILL
KEEP PRECIPITATION LIKELY NEAR THE CASCADE CREST AND NORTHEAST
OREGON MOUNTAINS. THE FRONTAL BOUNDARY WILL MOVE NORTHWARD FRIDAY
OVER THE CWA AS A WARM FRONT. THIS WILL BRING ANOTHER PERIOD OF
WIDESPREAD RAIN. HIGH TEMPS OVER THE NEXT SEVERAL DAYS WILL REMAIN
IN THE 50S AND 60S. WITH THE ACTIVE WEATHER PATTERN WINDS WILL
BECOME BREEZY AT TIMES WEDNESDAY AND THURSDAY.  COONFIELD

.LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY...EXCEPT FOR THE
CASCADES...A BRIEF BREAK IN THE PRECIPITATION WILL OCCUR FRIDAY
NIGHT AS THE WARM FRONT MOVES NORTH OF THE AREA. AS THE UPPER TROF
AND COLD FRONT MOVE ACROSS THE AREA LATE SATURDAY AND
SUNDAY...SURGES OF MOISTURE WILL AFFECT MAINLY THE CASCADES AND BLUE
MOUNTAINS. SNOW LEVEL ABOVE 4500 IN WASHINGTON AND ABOVE 5000 IN
OREGON SO IMPACTS WILL BE MINIMAL. SLIGHTLY DRIER CONDITIONS RETURN
MONDAY...BUT ANOTHER UPPER LEVEL TROF TO MOVE ACROSS THE AREA
TUESDAY AND WEDNESDAY.  IT IS POSSIBLE THIS TROF MAY CONTAIN SOME
LEFT OVER MOISTURE AND ENERGY FROM PACIFIC TROPICAL SYSTEM ANA AS IT
GETS ENTRAINED INTO THE WESTERLY FLOW OVER THIS WEEKEND.

&&

.AVIATION...12Z TAFS...OVC CIGS WILL BE LOWERING TO NEAR MVFR AT
KRDM AND KBDN BY 00Z.  REST OF TAF SITES SHOULD REMAIN VFR WITH -RA
OR -SHRA OVERSPREADING AREA BETWEEN 15Z AND 00Z AND CONTINUING INTO
12Z.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  70  51  67  48 /  10  80  50  20
ALW  68  52  67  51 /  10  80  50  20
PSC  68  53  69  49 /  30  80  30  20
YKM  60  44  63  41 /  80 100  20  20
HRI  68  47  68  46 /  20  80  30  20
ELN  59  46  63  41 /  90 100  30  20
RDM  65  46  63  43 /  40  90  40  30
LGD  63  52  62  46 /  10  70  50  40
GCD  64  47  61  45 /  10  70  50  40
DLS  62  50  64  47 /  70 100  40  30

&&

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

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

$$

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