HAZARDOUS WEATHER OUTLOOK Issue Date: 900 AM PST TUE DEC 15 2009 Expiration: 530 AM PST WED DEC 16 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
WINTER MIX
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON, LOWER COLUMBIA
BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF
WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, LOWER
COLUMBIA BASIN OF OREGON, FOOTHILLS OF THE BLUE MOUNTAINS OF
OREGON
SNOW
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, KITTITAS VALLEY,
YAKIMA VALLEY, NORTHWEST BLUE MOUNTAINS, GRANDE RONDE VALLEY,
WALLOWA COUNTY, NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN
BLUE MOUNTAINS OF OREGON, OCHOCO-JOHN DAY HIGHLANDS
FREEZING RAIN
NORTH CENTRAL OREGON
A PACIFIC WARM FRONT HAS BROUGHT WIDESPREAD PRECIPITATION EAST OF
THE CASCADES. MULTIPLE WINTER STORM WARNINGS AND ADVISORIES ARE IN
EFFECT. DETAILS CAN BE FOUND IN THE NWS PRODUCT PDXWSWPDT. THE
LOWER COLUMBIA BASIN...THE BLUE MOUNTAIN FOOTHILLS...NORTH CENTRAL
OREGON AND THE EASTERN COLUMBIA RIVER GORGE WILL SEE FREEZING RAIN
THIS MORNING WITH ICE ACCUMULATIONS UP TO ONE QUARTER OF AN INCH.
MODERATE TO HEAVY SNOW CAN BE EXPECTED ALONG THE EAST SLOPES OF THE
WASHINGTON CASCADES...THE BLUE MOUNTAINS...OCHOCO-JOHN DAY
HIGHLANDS...AND PORTIONS OF THE WALLOWA AND GRANDE RONDE VALLEYS.
BLOWING SNOW CAN BE EXPECTED IN THE GRANDE RONDE VALLEY AND THE BLUE
MOUNTAINS.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
A MOIST WESTERLY FLOW ALOFT WILL BRING A SERIES OF UPPER LEVEL WAVES
ACROSS WASHINGTON AND OREGON WITH PERIODS OF RAIN AND MOUNTAIN SNOW
THROUGH THE END OF THE WEEK AND EARLY NEXT WEEK.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED TODAY.
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:
WWW.WRH.NOAA.GOV/PDT/CURRENTHAZARDS/HWO.HTML
ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE H IN
CURRENTHAZARDS.
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