647
FLUS46 KPDT 241711 AAA
HWOPDT
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PENDLETON OR
915 AM PST TUE NOV 24 2009
UPDATED FOR WIND ADVISORY IN THE GRANDE RONDE VALLEY
ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-251415-
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-
915 AM PST TUE NOV 24 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
DAY ONE
REST OF TODAY AND TONIGHT
STRONG WIND
GRANDE RONDE VALLEY
A TIGHT PRESSURE GRADIENT OVER NORTHEAST OREGON IS CREATING VERY
WINDY CONDITIONS IN THE GRANDE RONDE VALLEY...MAINLY NEAR LADD AND
PYLES CANYONS. SOUTH WINDS 25 TO 35 MPH WITH GUSTS TO 45 MPH WILL
CONTINUE THROUGH EARLY WEDNESDAY MORNING THEN WILL INCREASE EVEN
MORE ON WEDNESDAY. A WIND ADVISORY HAS BEEN ISSUED FOR THE GRANDE
RONDE VALLEY. DETAILS CAN BE FOUND IN THE NWS PRODUCT PDXNPWPDT.
A WEAK WEATHER DISTURBANCE WILL CROSS THE PACIFIC NORTHWEST THIS
MORNING AND EXIT THE REGION BEGINNING LATE THIS AFTERNOON AND
TONIGHT. THERE WILL BE ISOLATED TO SCATTERED SHOWERS THIS MORNING
DECREASING THIS AFTERNOON...ESPECIALLY OVER THE MOUNTAINS.
DAYS TWO THROUGH SEVEN
WEDNESDAY THROUGH MONDAY
STRONG WIND WEDNESDAY
GRANDE RONDE VALLEY
THE WIND ADVISORY REMAINS IN EFFECT FOR THE GRANDE RONDE VALLEY
THROUGH WEDNESDAY AFTERNOON. THE ADVISORY MAY BE EXPECTED INTO
THANKSGIVING DAY...AS SURFACE PRESSURE GRADIENTS REMAIN TIGHT IN
NORTHEAST OREGON THE NEXT SEVERAL DAYS.
HIGH PRESSURE ALOFT WITH LIGHT WINDS WILL DEVELOP OVER MOST OF THE
REGION. THIS WILL CAUSE VALLEY AND COLUMBIA BASIN INVERSIONS TO
DEVELOP BY WEDNESDAY AND CONTINUE THROUGH THE MORNING OF
THANKSGIVING DAY. ANOTHER WEATHER SYSTEM WILL THEN APPROACH THE
REGION LATER IN THE DAY THANKSGIVING INTO FRIDAY WITH ANOTHER CHANCE
OF PRECIPITATION. UNSETTLED CONDITIONS WILL PERSIST INTO SATURDAY
AND THEN ANOTHER UPPER RIDGE WITH DRIER CONDITIONS WILL BUILD OVER
THE REGION ON SUNDAY AND MONDAY.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION MAY BE REQUIRED FOR WINDS IN THE GRANDE RONDE
VALLEY.
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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