Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 311741
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
941 AM PST SAT JAN 31 2015

.SHORT TERM...MORNING UPDATE...WEAKENING UPPER LEVEL HIGH PRESSURE
WILL REMAIN OVER THE THROUGH TONIGHT. AS SUCH LOW LEVEL INVERSIONS
WILL CONTINUE TO TRAP LOW CLOUDS AND FOG OVER PORTIONS OF THE AREA.
EXPECT TO SEE BETTER CLEARING TODAY ABOVE 2500 FT MSL IN CENTRAL
OREGON DUE A WEAK SYSTEM MOVING OVER THE AREA. EXPECT THE LOW CLOUDS
AND PATCHY FOG TO HOLD OVER THE COLUMBIA BASIN. THE WEAK SYSTEM WILL
CAUSE SOME PATCHY DRIZZLE THIS MORNING, ESPECIALLY OVER THE OREGON
BLUE MOUNTAIN FOOTHILLS. UPDATES THIS MORNING FOCUSED ON ADJUSTMENTS
TO FOG LOCATIONS, SKY COVER AND HIGH TEMPS. ALSO MADE SOME MINOR
ADJUSTMENTS TO WINDS THROUGH TONIGHT. 90

.LONG TERM...PREVIOUS DISCUSSION...A WEATHER SYSTEM WILL BE MOVING
EAST OF THE AREA MONDAY NIGHT WITH JUST A FEW LINGERING MOUNTAIN
SHOWERS. ON TUESDAY INTO WEDNESDAY THE GFS AND ECMWF DISAGREE ON THE
WEATHER PATTERN. THE ECMWF LIFTS A WARM FRONT THROUGH THE AREA WITH
ABUNDANT RAINFALL AND PERHAPS SOME SNOW ALONG THE WASHINGTON
CASCADES...WHILE THE GFS KEEPS THE AREA DRY. HAVE TRENDED THE
FORECAST A BIT TOWARD THE ECMWF WHICH HAS BEEN CONSISTENT FROM RUN
TO RUN BUT ONLY WENT CHANCE POPS FOR NOW. IF THE ECMWF IS CORRECT
COULD SEE POPS EVENTUALLY BEING RAISED TO LIKELY CATEGORY. BY LATE
THURSDAY INTO SATURDAY A MOIST SWLY FLOW ALOFT WILL BRING SEVERAL
PERIODS OF MODERATE TO HEAVY RAIN TO THE AREA. ALTHOUGH THE DETAILS
WITH REGARD TO TIMING ARE A BIT SKETCHY COULD SEE 2-3 INCHES OF RAIN
IN THE MOUNTAINS AND .5 TO 1 INCHES OF RAIN IN THE LOWLANDS. COULD
ALSO BE WINDY FRIDAY INTO SATURDAY WITH GUSTY SOUTH WINDS POSSIBLY
REACHING ADVISORY LEVELS.

&&

.AVIATION...18Z TAFS...AREAS OF MVFR CEILINGS AND VSBY ARE LIKELY
WITH LCL IFR CONDITIONS ACROSS MOST TAFS SITES ESPECIALLY AT KPDT
AND KALW. ELSEWHERE LCL MVFR CEILINGS CAN BE EXPECTED ALTHOUGH TAF
SITE KRDM MAY EXPERIENCE VFR CONDITIONS AT TIMES TODAY. AFT 02Z ALL
TAF SITES COULD EXPERIENCE AREAS OF MVFR AND LCL IFR CONDITIONS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  36  31  42  36 /   0  10  30  40
ALW  39  33  41  38 /   0  10  40  40
PSC  41  32  42  36 /  10  10  30  30
YKM  38  32  39  31 /   0  10  30  30
HRI  41  32  43  36 /   0  10  30  30
ELN  38  30  40  31 /   0  10  40  40
RDM  50  28  50  34 /   0  10  30  30
LGD  46  27  42  34 /   0   0  40  50
GCD  45  25  46  32 /   0  10  30  50
DLS  43  35  45  39 /   0  10  40  40

&&

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

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

$$

90/78/97






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