HAZARDOUS WEATHER OUTLOOK
Issue Date: 545 AM PST FRI DEC 4 2009
Expiration: 545 AM PST SAT DEC 05 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
OREGON AND SOUTHWEST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
AREAS OF FREEZING FOG CAN BE EXPECTED IN SOME OF THE VALLEY
LOCATIONS THIS MORNING.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
COLD ARCTIC AIR IS EXPECTED TO REACH THE AREA LATE SATURDAY NIGHT
AND SUNDAY. TEMPERATURES IN THE TEENS AND LOWER 20S AND GUSTY
WINDS WILL CREATE LOW WIND CHILLS IN SOME AREAS.
.SPOTTER INFORMATION STATEMENT...
SPOTTERS SHOULD REPORT ANY SNOW ACCUMULATIONS.
SPECIAL WEATHER STATEMENT
Issue Date: 506 AM PST FRI DEC 4 2009
Expiration: 115 PM PST FRI DEC 04 2009
...ARCTIC BLAST HEADED TOWARD NORTHWEST OREGON AND SOUTHWEST
WASHINGTON LATE SATURDAY NIGHT AND SUNDAY...
A SERIES OF COLD WEATHER SYSTEMS WILL MOVE ACROSS THE PACIFIC
NORTHWEST OVER THE NEXT SEVERAL DAYS. THE FIRST COLD FRONT IS
EXPECTED TO MOVE DOWN FROM BRITISH COLUMBIA AND ACROSS WASHINGTON
AND OREGON TONIGHT. THIS SYSTEM WILL NOT CONTAIN MUCH MOISTURE
BUT A FEW SNOW FLURRIES ARE POSSIBLE IN THE NORTHERN VALLEYS WITH
A SLIGHT CHANCE OF MEASURABLE SNOW IN THE CASCADES.
VERY COLD ARCTIC AIR IS EXPECTED TO MOVE IN LATE SATURDAY NIGHT
AND SUNDAY BEHIND AN ARCTIC FRONT THAT WILL SWEEP ACROSS THE
CASCADES WESTWARD INTO NORTHWEST OREGON AND SOUTHWEST WASHINGTON.
DAYTIME TEMPERATURES WILL REMAIN BELOW FREEZING IN MANY AREAS OF
THE WILLAMETTE VALLEY AND CLARK COUNTY SUNDAY AND MONDAY.
OVERNIGHT TEMPERATURES WILL FALL INTO THE TEENS AND TWENTIES ALONG
WITH INCREASING EASTERLY WINDS.
IN THE COLUMBIA GORGE WINDS OF 30 T0 40 MPH WITH GUSTS TO 45 MPH
WITH TEMPERATURES IN THE UPPER TEENS TO LOWER 20S WILL RESULT IN WIND
CHILLS NEAR ZERO AT TIMES. IN THE PORTLAND METRO AREA AND CLARK
COUNTY WIND CHILLS IN THE SINGLE DIGITS CAN BE EXPECTED ESPECIALLY
NEAR THE GORGE. TEMPERATURES IN THE CASCADES WILL BE IN THE SINGLE
DIGITS WITH WIND CHILLS 10 TO 15 DEGREES BELOW ZERO AT THE
PASSES AND RIDGES.
SOME SCATTERED SNOW SHOWERS ARE POSSIBLE IN THE CASCADES AND THERE
IS A CHANCE THIS SYSTEM COULD BRING SOME LIGHT SNOW TO VALLEYS.
THIS WILL DEPEND ON HOW THE SYSTEM DEVELOPS AND HOW MUCH MOISTURE
IS AVAILABLE.
IT NOW APPEARS THAT LOW LEVEL COLD AIR WILL REMAIN IN PLACE OVER
SOUTHWEST WASHINGTON AND NORTHWEST OREGON ON MONDAY AND INTO
TUESDAY. TEMPERATURES ALONG THE COAST MAY MODERATE SOME TUESDAY.
YOU SHOULD TAKE ACTION NOW TO PREPARE FOR THE VERY COLD WEATHER.
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