HAZARDOUS WEATHER OUTLOOK
Issue Date: 533 AM PST SUN DEC 6 2009
Expiration: 600 AM PST MON DEC 07 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
OREGON AND SOUTHWEST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
COLD ARCTIC AIR WILL MOVE INTO THE AREA TODAY AND TONIGHT...
ACCOMPANIED BY GUSTY EAST TO NORTHEAST WINDS OF 30 TO 40 MPH...
WITH GUSTS OF 50 TO 60 MPH POSSIBLE IN THE WESTERN COLUMBIA RIVER
GORGE AND OVER THE MOUNTAINS. TEMPERATURES IN THE TEENS AND 20S
TONIGHT TONIGHT COMBINED WITH THE GUSTY WINDS WILL CREATE LOW
WIND CHILLS IN SOME AREAS.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY
COLD ARCTIC AIR ALONG WITH GUSTY EAST TO NORTHEAST WINDS WILL
CONTINUE ON MONDAY...WITH TEMPERATURES REMAINING BELOW FREEZING
IN MOST INLAND VALLEYS. CONDITIONS WILL SLOWLY MODERATE TUESDAY
THROUGH THE REMAINDER OF THE WEEK...BUT WILL REMAIN COLDER THAN
NORMAL.
.SPOTTER INFORMATION STATEMENT...
SPOTTER REPORTS OF WIND AND COLD TEMPERATURES LIKELY WILL BE
NEEDED TODAY AND FOR THE NEXT COUPLE OF DAYS.
SPECIAL WEATHER STATEMENT
Issue Date: 522 AM PST SUN DEC 6 2009
Expiration: 200 PM PST SUN DEC 06 2009
...VERY COLD WEATHER SWEEPING SOUTH TOWARD THE PACIFIC NORTHWEST...
AN ARCTIC FRONT CURRENTLY IN SOUTHERN BRITISH COLUMBIA WILL
CONTINUE TO DROP SOUTH ON ITS WAY TO THE PACIFIC NORTHWEST. AN
INITIAL SURGE OF COLDER AIR WILL SPREAD INTO SOUTHWEST WASHINGTON
AND NORTHWEST OREGON TODAY...ALONG WITH GUSTY EAST TO NORTHEAST
WINDS. WIND GUSTS OF 30 TO 40 MPH ARE LIKELY TODAY AND TONIGHT...
WITH HIGHER GUSTS OF 50 TO 60 MPH EXPECTED IN THE MOUNTAINS AND
WESTERN COLUMBIA RIVER GORGE. DAYTIME TEMPERATURES WILL REMAIN IN
THE MID 30S IN MOST AREAS OF THE WILLAMETTE VALLEY AND CLARK
COUNTY TODAY.
ISOLATED SNOW SHOWERS ARE POSSIBLE TODAY OUT AHEAD OF THE ARCTIC
FRONT. HOWEVER...GIVEN THE LIMITED MOISTURE AVAILABLE...NO
SIGNIFICANT ACCUMULATIONS ARE EXPECTED.
A COLDER AIR MASS WILL ARRIVE TONIGHT...WITH NIGHTTIME
TEMPERATURES FALLING INTO THE TEENS AND TWENTIES FOR THE NEXT TWO
NIGHTS. DAYTIME TEMPERATURES WILL LIKELY REMAIN BELOW FREEZING ON
MONDAY...WITH SLIGHT WARMING EXPECTED ON TUESDAY. GUSTY EAST TO
NORTHEAST WINDS WILL CONTINUE TONIGHT AND MONDAY.
WIND CHILL VALUES WILL DROP SIGNIFICANTLY TONIGHT. IN THE
COLUMBIA GORGE...WHERE WIND GUSTS UP TO 60 MPH WILL COINCIDE WITH
TEMPERATURES IN THE UPPER TEENS TO LOWER 20S...WIND CHILL VALUES
WILL DROP TO NEAR ZERO AT TIMES. SIMILARLY...WIND CHILL VALUES IN
THE SINGLE DIGITS CAN BE EXPECTED IN SECTIONS OF THE PORTLAND
METRO AREA AND CLARK COUNTY NEAR THE GORGE. OVERNIGHT TEMPERATURES
IN THE CASCADES WILL BE IN THE SINGLE DIGITS WITH WIND CHILLS AS
LOW AS 20 DEGREES BELOW ZERO AT THE PASSES AND RIDGES.
COLD DRY OFFSHORE FLOW WILL GRADUALLY EASE TUESDAY AND
WEDNESDAY...BUT PERSISTENT EAST WINDS ARE LIKELY TO CONTINUE
THROUGH THE WESTERN GORGE THROUGH MUCH OF THE UPCOMING WEEK.
PRECIPITATION CHANCES WILL REMAIN LOW UNTIL NEXT WEEKEND...AS
WEATHER SYSTEMS WILL BE MAKING LANDFALL WELL TO OUR SOUTH KEEPING
THE BRUNT OF ANY WINTRY PRECIPITATION OUT OF THE AREA.
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