Snow Advisory 3, NWS Pendleton, OR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 AM PST SUN JAN 7 2007

.SHORT TERM...TODAY THROUGH SUNDAY NIGHT...SATELLITE AND RADARS SHOW
NEXT STORM ALREADY MOVING INTO THE PAC NW EARLY THIS MORNING. SNOW
FALLING IN A FEW AREAS ESPECIALLY THE WASHINGTON CASCADES. EXPECT
PRECIP COVERAGE TO INCREASE TODAY AND SPREAD ACROSS MOST OF THE
REGION. DOWNSLOPE WINDS WILL KEEP RAIN TO A MINIMUM IN THE COLUMBIA
BASIN AS WINDS BEGIN TO INCREASE. BEST SNOW ACCUMULATIONS WILL BE IN
WASHINGTON CASCADES AND HAVE ISSUED A SNOW ADVISORY THERE. AS FOR
THE WINDS...HIGH WIND WARNING IN EFFECT FOR COLUMBIA BASIN AND AREAS
NORTHWESTWARD TOWARD YAKIMA AND KITTITAS VALLEYS AND MOUNTAINS.
SURFACE GRADIENTS INCREASE AS LOW PRESSURE SYSTEM MOVES BY TO THE
NORTH. STRONG 850MB WINDS SIMILAR TO YESTERDAY SWEEP ACROSS THE
NORTHERN PORTION OF FORECAST AREA LATER THIS MORNING THROUGH EARLY
EVENING. SHOULD SEE GUSTY SOUTH WINDS THEN A SURGE OF STRONG WEST
WINDS LATE. WINDS WILL DIMINISH TONIGHT. FRONTAL SYSTEM GETS HUNG UP
OVER THE AREA TONIGHT AND MOVES BACK NORTHWARD MONDAY AS UPPER RIDGE
BUILDS. HAVE INCREASED CLOUD COVER AND POPS TO ACCOUNT FOR THIS.
SHOULD SEE SOME DRY WEATHER BY MONDAY NIGHT.  94

.LONG TERM...TUESDAY THROUGH SATURDAY...THE NEXT STRONG SYSTEM TO
IMPACT THE AREA WILL MOVE INTO THE AREA TUESDAY NIGHT...BRINGING
WINDY CONDITIONS...PRECIPITATION AND COOLER TEMPERATURES.
THEN...ANOTHER SYSTEM WILL DROP DOWN FROM THE NORTH ON WEDNESDAY AND
THURSDAY. THIS SYSTEM WILL BRING VERY COLD ARCTIC AIR TO THE
REGION...WITH LOWER ELEVATIONS SEEING HIGH TEMPERATURES IN THE MID
TO UPPER 20S ON THURSDAY AND FRIDAY. LOW TEMPERATURES WILL DROP INTO
THE TEENS AND NEAR ZERO FOR AREAS WITH SNOW STILL ON THE GROUND. DK

&&

.AVIATION...CAN EXPECT MAINLY VFR CONDITIONS TODAY...THOUGH CEILINGS
MAY DROP TO 3000 FT AND VISIBILITY TO MVFR NEAR ISOLATED SHOWERS
UNTIL 18Z. WINDS ARE EXPECTED TO INCREASE THIS MORNING WITH GUSTS
NEARING 45 KTS POSSIBLE AFTER 15Z. BY 18Z AND THROUGH THE
DAY...WINDS MAY GUST TO 50 KTS ACROSS THE COLUMBIA BASIN...FOOTHILLS
OF THE BLUES AND PORTIONS OF YAKIMA VALLEY...INCLUDING TAF SITES
KYKM...KPSC...KPDT AND KALW. DK

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  37  47  34 /  20  10  10  10
ALW  48  37  47  36 /  30  10  10  10
PSC  50  37  47  33 /  20  10  10  10
YKM  40  33  42  30 /  60  10  10  10
HRI  49  37  47  34 /  20  10  10  10
ELN  37  31  38  27 /  80  10  10  10
RDM  45  30  46  27 /  30  20  10  10
LGD  45  33  41  31 /  50  20  10  10
GCD  43  31  44  25 /  40  20  10  10
DLS  46  39  47  35 /  40  20  10  10

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...HIGH WIND WARNING FROM 10 AM THIS MORNING TO 7 PM PST THIS
     EVENING FOR ORZ041-044-501.

WA...HIGH WIND WARNING FROM 10 AM THIS MORNING TO 7 PM PST THIS
     EVENING FOR WAZ024-026>029-501-502.

     SNOW ADVISORY UNTIL 7 PM PST THIS EVENING FOR WAZ501.

&&

TI:YGG
FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON
94/84/84

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