Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 312246
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
246 PM PST SAT JAN 31 2015

.SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...THE UPPER RIDGE OVER
THE REGION WILL STRENGTHEN SLIGHTLY TONIGHT. THUS EXPECT THE LOW
LEVEL INVERSIONS TO REMAIN LARGELY IN PLACE THROUGH THE NIGHT WITH
LOW CLOUDS AND PATCHY FOG GENERALLY BELOW 3500-4000 FT MSL. THERE
MAY SOME LOCAL AREAS OF DENSE FOG OVERNIGHT. AM UNSURE EXACTLY WHICH
LOCATIONS WILL SEE DENSE FOG, THUS WILL NOT ISSUE ANY ADVISORIES AT
THIS TIME. A WEAKENING SYSTEM WILL MOVE INTO AND THROUGH THE RIDGE
SUNDAY. THIS SYSTEM WILL BRING PRECIP TO THE AREA SUNDAY. SNOW
LEVELS WILL START BETWEEN 2000 AND 4000 FT MSL SUNDAY MORNING BUT
SHOULD RISE TO BETWEEN 3500 AND 6000 FT MSL BY AFTERNOON. SNOW
ACCUMULATIONS WILL BE LIGHT ABOVE THESE LEVELS. THE LIFT ASSOCIATED
WITH THIS SYSTEM SHOULD WEAKEN THE LOW LEVEL INVERSIONS LEADING TO
THE BREAK UP OF THE LOW CLOUDS AND FOG OVER THE AREA. SOME LIGHT
PRECIP WILL CONTINUE, ESPECIALLY OVER THE MOUNTAINS, SUNDAY NIGHT
DUE TO AN ONSHORE FLOW. A STRONGER SYSTEM STILL LOOKS ON TRACK TO
MOVE THROUGH THE REGION MONDAY. THIS SYSTEM LOOKS TO BE WETTER THAN
THE SYSTEM SUNDAY. SNOW LEVELS MONDAY WILL BE HIGHER, RUNNING FROM
4500 TO 6500 FT MSL. THUS SNOW WILL LIMITED TO THE HIGHER MOUNTAIN
RIDGES. EXPECT WINDS TO BECOME BREEZY OVER PORTIONS OF THE AREA
MONDAY AFTERNOON AND EVENING. THESE WINDS WILL KEEP CONDITIONS WELL
MIXED AND OVERNIGHT LOWS WILL BE SEASONALLY MILD. 90

.LONG TERM...TUESDAY THROUGH SATURDAY...A DISTURBANCE WILL MOVE
ACROSS THE AREA TUESDAY WITH CLOUDS AND SHOWERS PERSISTING ACROSS
WA/OR INTO TUESDAY NIGHT. CLEARING SKIES WITH ABOVE NORMAL
TEMPERATURES ARE EXPECTED WEDNESDAY AS A RIDGE OF HIGH PRESSURE
BUILDS INTO THE TWO STATE AREA. A SECOND LOW PRESSURE SYSTEM BRINGS
ANOTHER ROUND OF CLOUDS AND SHOWERS ON THURSDAY WITH YET ANOTHER
DISTURBANCE ON FRIDAY. PRESSURE GRADIENTS ALSO TIGHTEN AND BREEZY
SURFACE WINDS ARE POSSIBLE TOWARD THE END OF THE WEEK.

&&

.AVIATION...00Z 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
SITES KRDM AND KBDN MAY EXPERIENCE VFR CONDITIONS AT TIMES INTO THIS
EVENING. AFT 04Z ALL TAF SITES COULD EXPERIENCE AREAS OF MVFR AND
LCL IFR CONDITIONS INTO SUNDAY AND MORE SO AFTER 15Z TOMORROW IN
SHOWERS.

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  32  40  36  51 /  10  60  40  60
ALW  34  41  39  52 /  10  60  40  70
PSC  34  42  35  51 /  10  50  30  60
YKM  32  39  33  46 /  10  30  20  50
HRI  34  42  36  52 /  10  50  30  60
ELN  31  40  32  45 /  10  30  20  60
RDM  28  51  37  57 /   0  30  30  60
LGD  24  43  34  48 /   0  50  50  70
GCD  29  46  35  52 /  10  30  40  60
DLS  37  46  38  52 /  10  40  30  60

&&

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

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

$$

90/97/97








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