Area Forecast Discussion
Issued by NWS Pendleton, OR

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000
FXUS66 KPDT 012244
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
243 PM PST SUN MAR 1 2015

.SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT...A WEAK SYSTEM MOVING
SOUTH ALONG THE BRITISH COLUMBIA COAST WILL APPROACH THE REGION
TONIGHT. THIS SYSTEM WILL TRACK SOUTH ALONG THE PACIFIC NORTHWEST
COAST TONIGHT THROUGH MONDAY MORNING. THE MAIN IMPACT OF THIS SYSTEM
WILL BE TO PUSH VARIABLE AMOUNTS OF MID AND HIGH CLOUDINESS ACROSS
THE AREA TONIGHT AND MONDAY MORNING. SOME LIGHT PRECIP, MAINLY SNOW,
WILL ALSO BE POSSIBLE ALONG THE CASCADE CREST AND OVER PORTIONS OF
THE CASCADE EAST SLOPES. THIS PRECIP SHOULD BE DONE BY MID MORNING
MONDAY. ANOTHER MODIFIED ARCTIC AIR MASS WILL THEN FILTER INTO THE
REGION STARTING MONDAY AFTERNOON. THIS AIR MASS WILL CONTINUE TO
PUSH SOUTH ACROSS THE REGION MONDAY NIGHT. LIGHT SHOWERS OF RAIN AND
SNOW WILL DEVELOP ALONG THE LEADING EDGE OF THIS AIR MASS OVER THE
EASTERN MOUNTAINS AND THE WASHINGTON CASCADE EAST SLOPES MONDAY
AFTERNOON. SNOW LEVELS IN THESE AREAS WILL RUN BETWEEN 2500 AND 4000
FEET WITH LIGHT ACCUMULATIONS. THESE SHOWERS SHOULD SPREAD TO AFFECT
PORTIONS OF THE BLUE MOUNTAIN FOOTHILLS AND THE SIMCOE HIGHLANDS IN
THE EVENING, THEN EVENTUALLY CENTRAL OREGON OVERNIGHT. SNOW LEVELS
WILL RUN BETWEEN 1200 AND 3500 FEET MONDAY EVENING, THEN DROP TO THE
LOWEST ELEVATIONS OVERNIGHT. AGAIN ACCUMULATIONS WILL BE LIGHT,
THOUGH 1 TO 2 INCHES MAY BE POSSIBLE IN WALLOWA COUNTY. LOCALLY
BREEZY NORTHERLY WINDS WILL BE POSSIBLE OVER PORTIONS OF THE
COLUMBIA BASIN MONDAY NIGHT. TUESDAY WILL SEE DRYING AND CLEARING
CONDITIONS WITH ONLY A FEW LINGERING MORNING SNOW SHOWERS IN WALLOWA
COUNTY. CONDITIONS WILL BE MOSTLY CLEAR AND COLD TUESDAY NIGHT. 90

.LONG TERM...WEDNESDAY THROUGH SUNDAY...DRY NORTHERLY FLOW WILL
SHIFT NORTHWEST TOWARDS THE END OF THE WORK WEEK. A RIDGE OF HIGH
PRESSURE WILL CONTINUE TO BUILD OVER THE WEST COAST DURING THE
WEEKEND. RIGHT NOW IT LOOKS LIKE MID AND HIGH CLOUDS WILL BE
MINIMAL...THEREFORE MOSTLY SUNNY SKIES SHOULD RESULT. OVERNIGHT LOWS
WILL BE NEAR FREEZING FOR THE VALLEYS AND SLIGHTLY BELOW FREEZING
FOR THE MOUNTAINS. HIGHS WILL START TO PUSH INTO THE 60S BY THE
WEEKEND.  PRECIPITATION CHANCES ARE LESS THAN 10 PERCENT FOR THE
EXTENDED. WEBER

&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24
HOURS WITH WINDS LESS THAN 10 KTS THROUGH 18Z. WINDS WILL PICKUP
BETWEEN 18-0Z TOMORROW WITH WIND SPEEDS RANGING FROM 5-15KTS. CIGS
WILL START OFF MOSTLY CLEAR AND LOWER TO 5-10KFT AFTER 12Z MONDAY.
WEBER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  27  46  23  42 /   0  10  20   0
ALW  29  47  27  43 /   0  10  20   0
PSC  25  52  21  47 /   0  10  10   0
YKM  28  51  24  46 /  10  10   0   0
HRI  22  51  20  46 /   0  10  10   0
ELN  27  51  22  46 /  10  10  20   0
RDM  20  46  15  44 /  10  10  20   0
LGD  24  44  22  40 /   0  20  30  10
GCD  22  45  19  40 /   0  20  20  10
DLS  29  54  27  50 /  10  10   0   0

&&

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

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

$$

90/89/89








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