HAZARDOUS WEATHER OUTLOOK
Issue Date: 840 PM PST TUE DEC 08 2009
Expiration: 615 AM PST WED DEC 09 2009 Expires:200912091415;;
FLUS46 KPDT 090439 AAA
HWOPDT
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
839 PM PST TUE DEC 8 2009
UPDATED TO REFLECT CURRENT FORECAST
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-091415-
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-
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-
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON-
EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON-
839 PM PST TUE DEC 8 2009
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
A VERY COLD ARCTIC AIR MASS WILL REMAIN IN PLACE OVER THE PACIFIC
NORTHWEST TONIGHT. LOWS TONIGHT WILL RANGE FROM -20 TO 8 DEGREES.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
EXTREME COLD WEDNESDAY
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
WINTER MIX SATURDAY
NORTH CENTRAL OREGON, CENTRAL OREGON
WINTER MIX SUNDAY
NORTH CENTRAL OREGON, CENTRAL OREGON, NORTHERN WHEELER AND
SOUTHERN GILLIAM COUNTIES, JOHN DAY BASIN
THE VERY COLD CONDITIONS WILL PERSIST...THEN BEGIN TO SLOWLY
MODERATE THURSDAY AND FRIDAY. HOWEVER...A SIGNIFICANT AMOUNT OF COLD
AIR WILL REMAIN TRAPPED IN THE COLUMBIA BASIN...CENTRAL
OREGON...NORTH CENTRAL OREGON AND ADJACENT VALLEYS. A WEEKEND
WEATHER SYSTEM WILL MOVE ACROSS THIS DOME OF ARCTIC AIR WITH A
POTENTIAL MIX OF WINTER PRECIPITATION TYPES SATURDAY AND SUNDAY.
SNOW MIXED WITH SLEET WILL BE POSSIBLE MAINLY ACROSS NORTH CENTRAL
AND CENTRAL OREGON SATURDAY SPREADING EASTWARD SUNDAY MAINLY
AFFECTING THE VALLEY LOCATIONS IN THE AREAS MENTIONED ABOVE. IT
SHOULD BE NOTED, HOWEVER, THAT MODELS HAVE BEEN HIGHLY VARIABLE WITH
THEIR SOLUTIONS OVER THE PAST SEVERAL DAYS AND THAT FUTURE FORECASTS
AND STATEMENTS FROM THE NATIONAL WEATHER SERVICE SHOULD BE CLOSELY
MONITORED FOR THE LATEST INFORMATION.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED.
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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