HAZARDOUS WEATHER OUTLOOK
Issue Date: 238 PM PST WED DEC 9 2009
Expiration: 615 AM PST THU DEC 10 2009
UPDATED FOR SNOW ON SATURDAY.
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TONIGHT
EXTREME COLD
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA
RIVER GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON,
LOWER COLUMBIA BASIN OF OREGON, GRANDE RONDE VALLEY, WALLOWA
COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON, NORTHERN
BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF OREGON,
NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN DAY
BASIN, OCHOCO-JOHN DAY HIGHLANDS
VERY COLD AIR WILL REMAIN OVER THE AREA TONIGHT. OVERNIGHT LOW
TEMPERATURES WILL RANGE FROM -12 HIGH PLATEAUS TO 12 IN THE WARMER
LOWER ELEVATION LOCATIONS.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
WINTER MIX FRIDAY
NORTH CENTRAL OREGON, CENTRAL OREGON
WINTER MIX SATURDAY
NORTH CENTRAL OREGON, CENTRAL OREGON
SNOW SATURDAY
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN
COLUMBIA RIVER GORGE OF WASHINGTON, LOWER COLUMBIA BASIN OF
WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON,
NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA RIVER GORGE OF
OREGON, LOWER COLUMBIA BASIN OF OREGON, GRANDE RONDE VALLEY,
WALLOWA COUNTY, FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON,
NORTHERN BLUE MOUNTAINS OF OREGON, SOUTHERN BLUE MOUNTAINS OF
OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES, JOHN
DAY BASIN, OCHOCO-JOHN DAY HIGHLANDS
A COMPLEX WINTER STORM WILL MOVE ACROSS MAINLY OREGON THIS WEEKEND.
THERE IS STILL CONSIDERABLE UNCERTAINTY ABOUT THE TRACK AND OVERALL
IMPACTS OF THIS STORM. HOWEVER...SOME SNOW IS LIKELY ACROSS PORTIONS
OF OREGON AND EXTREME SOUTHERN WASHINGTON ALONG WITH A WINTER MIX IN
CENTRAL OREGON...BEGINNING FRIDAY NIGHT AND CONTINUING INTO SATURDAY
NIGHT.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED THIS WEEKEND.
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.
SPECIAL WEATHER STATEMENT
Issue Date: 114 PM PST WED DEC 9 2009
Expiration: 600 AM PST THU DEC 10 2009
...WINTER PRECIPITATION EVENT POSSIBLE ACROSS OREGON AND FAR
SOUTHERN WASHINGTON THIS WEEKEND...
A COMPLEX STORM SYSTEM WILL APPROACH THE AREA FRIDAY NIGHT AND
MOVE ACROSS OREGON AND FAR SOUTHERN WASHINGTON SATURDAY AND
SATURDAY NIGHT. THE ARCTIC AIR MASS OVER THE REGION IS MODERATING
VERY SLOWLY...SO MOST OF THE PRECIPITATION FROM THIS STORM WILL FALL
IN THE FORM OF SNOW. THERE IS STILL SOME UNCERTAINTY ON HOW FAR
NORTH THE MOISTURE FROM THIS SYSTEM WILL SPREAD...BUT THERE IS THE
POTENTIAL FOR ACCUMULATING SNOW IN THE LOWER ELEVATIONS OF NORTH
CENTRAL AND NORTHEAST OREGON AS WELL AS THE MOUNTAINS DEPENDING ON
THE STORM TRACK. SOME WARMER AIR ALOFT WILL SPREAD OVER PARTS OF
CENTRAL OREGON WHICH COULD LEAD TO SOME FREEZING RAIN AND SLEET
MIXED IN WITH THE SNOW.
THIS IS AN EVOLVING SITUATION AND PEOPLE ACROSS INTERIOR PORTIONS
OF OREGON AND EXTREME SOUTHERN WASHINGTON SHOULD CONTINUE TO
MONITOR THE FORECASTS OVER THE NEXT COUPLE OF DAYS.
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