HAZARDOUS WEATHER OUTLOOK
Issue Date: 501 AM PST TUE DEC 22 2009
Expiration: 445 AM PST WED DEC 23 2009

Expires:200912231245;;
FLUS46 KPDT 221300
HWOPDT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PST TUE DEC 22 2009
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-231245-
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-
500 AM PST TUE DEC 22 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
A LARGE LOW PRESSURE SYSTEM OVER EASTERN OREGON WILL BRING
SCATTERED TO NUMEROUS SNOW SHOWERS OVER THE MOUNTAINS.  NUMEROUS
SNOW SHOWERS WILL CONTINUE OVER NORTHEAST OREGON THIS
MORNING...MAINLY IN WALLOWA COUNTY WHERE ACCUMULATIONS UP TO 2
INCHES ARE EXPECTED.  SCATTERED SNOW SHOWERS WILL DEVELOP IN CENTRAL
OREGON THIS AFTERNOON WITH LOCAL ACCUMULATIONS AROUND ONE INCH
POSSIBLE.
THE LOW WILL MOVE SOUTH AND OUT OF THE REGION TONIGHT FOLLOWED BY
CLEARING SKIES AND LIGHT WINDS.  STRONG RADIATIONAL COOLING WILL
RESULT IN COLD OVERNIGHT LOW TEMPERATURES.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
HIGH PRESSURE WILL STRENGTHEN OVER THE PACIFIC NORTHWEST THIS
WEEK...RESULTING IN DRY AND STABLE CONDITIONS.  PATCHY FREEZING FOG
IS FORECAST OVER CENTRAL OREGON AND THE COLUMBIA BASIN ON CHRISTMAS
EVE NIGHT. HIGH PRESSURE WILL WEAKEN THIS HOLIDAY WEEKEND AND ALLOW
MOISTURE FROM THE PACIFIC TO SPREAD INLAND WITH A POTENTIAL FOR
WINTER PRECIPITATION...MAINLY ALONG THE EAST SLOPES OF THE CASCADES.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.
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.
$$