HAZARDOUS WEATHER OUTLOOK
Issue Date: 200 PM PST WED NOV 25 2009
Expiration: 615 AM PST THU NOV 26 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TONIGHT
VERY WINDY
GRANDE RONDE VALLEY
A TIGHT PRESSURE AND TEMPERATURE GRADIENT CONTINUES TO PERSIST
BETWEEN THE BAKER AND GRANDE RONDE VALLEYS. AS A RESULT STRONG WINDS
ARE OCCURRING IN THE SOUTHERN GRANDE RONDE VALLEY...ESPECIALLY IN
AND NEAR LADD AND PYLES CANYONS. A WIND ADVISORY REMAINS IN EFFECT
FOR THESE AREAS THROUGH 7 PM PST THURSDAY. PLEASE REFER TO PDXNPWPDT
FOR MORE DETAILS.
LIGHT WINDS IN THE COLUMBIA BASIN AND SURROUNDING VALLEYS WILL
RESULT IN PATCHY FOG AND LOCALLY PATCHY FREEZING FOG NEAR THE LARGER
RIVERS SUCH AS THE COLUMBIA AND YAKIMA RIVERS TONIGHT.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
VERY WINDY THURSDAY
GRANDE RONDE VALLEY
VERY WINDY CONDITIONS WILL CONTINUE IN THE GRANDE RONDE VALLEY
THROUGH THE DAY ON THURSDAY...ESPECIALLY IN AND NEAR LADD AND PYLES
CANYONS. PLEASE REFER TO PDXNPWPDT FOR MORE DETAILS.
A WEAK WEATHER SYSTEM WILL MOVE THROUGH THE REGION FRIDAY AND THEN
EXIT ON SATURDAY AND BE FOLLOWED BY HIGH PRESSURE ALOFT AGAIN. THIS
NEXT WEATHER SYSTEM WILL BRING MOSTLY LIGHT AMOUNTS OF
PRECIPITATION. THE UPPER RIDGE THAT FOLLOWS WILL PERSIST THROUGH
SUNDAY AND THEN ANOTHER WEATHER DISTURBANCE IS EXPECTED ON MONDAY.
THIS WILL BE FOLLOWED BY A COOLER NORTHERLY FLOW ON THE EAST SIDE OF
AN AMPLIFIED UPPER RIDGE OFF THE COAST WITH THIS SCENARIO PERSISTING
THROUGH THE LATTER HALF OF THE COMING WEEK.
.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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