Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 311059
AFDPDT

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

.SHORT TERM...TODAY THROUGH MONDAY. UPPER RIDGE OVER THE AREA TODAY.
SATELLITE AND OBSERVATIONS CONTINUE TO SHOW WIDESPREAD STRATUS FROM
THE COLUMBIA BASIN INTO CENTRAL OREGON. EXPECT THE LOW CLOUDS OVER
CENTRAL OREGON TO DISSIPATE DURING THE AFTERNOON. THE COLUMBIA BASIN
AND ADJACENT VALLEYS WILL REMAIN CLOUDY. A LITTLE MIXING OF THE
AIRMASS BELOW THE INVERSION THE PAST 12 HOURS HAS LIFTED THE STRATUS
RESULTING IN MUCH LESS FOG EARLY THIS MORNING. EXPECT THIS TREND TO
CONTINUE TODAY. A WEAK FRONTAL BOUNDARY WILL MOVE THROUGH THE
PACIFIC NORTHWEST ON SUNDAY WITH A CHANCE OF RAIN. THIS FRONT AND
INCREASING WESTERLY WINDS LATE IN THE DAY SHOULD ELIMINATE THE LOW
LEVEL INVERSION AND STRATUS CLOUDS BY EVENING. ANOTHER FRONT MOVES
THROUGH ON MONDAY WITH ADDITIONAL RAIN. LOCALLY BREEZY CONDITIONS
EXPECTED MONDAY AFTERNOON. 94

.LONG TERM...MONDAY NIGHT THROUGH SATURDAY...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. 78

&&

.AVIATION...12Z TAFS...WIDESPREAD MVFR/IFR CIGS ARE EXPECTED THROUGH
THE FORECAST PERIOD. CIGS WILL TEND TO LOWER EARLY THIS MORNING AND
THEN LIFT SOME THIS AFTERNOON. THERE WILL BE A LITTLE PATCHY FOG BUT
NOT EXPECTING DENSE FOG THIS MORNING EXCEPT AT KBDN WHERE STRATUS
DECK IS INTERSECTING THE TERRAIN. WINDS WILL BE LIGHT N-NE. 78

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  40  31  42  36 /   0  10  30  40
ALW  40  33  41  38 /   0  10  40  40
PSC  42  32  42  36 /  10  10  30  30
YKM  41  32  39  31 /   0  10  30  30
HRI  41  32  43  36 /   0  10  30  30
ELN  41  30  40  31 /   0  10  40  40
RDM  49  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

$$

94/78/78








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