HAZARDOUS WEATHER OUTLOOK
Issue Date: 258 PM PST WED DEC 23 2009
Expiration: 515 AM PST THU DEC 24 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.
DRY CONDITIONS ARE EXPECTED REGION-WIDE TODAY EXCEPT FOR LIGHT
FLURRIES IN THE EASTERN OREGON MOUNTAINS. IT WILL BE SEVERAL
DEGREES COLDER TODAY COMPARED TO YESTERDAY. WINDS WILL BE LIGHT.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
A COLD AND VERY STABLE AIR MASS WILL RESIDE EAST OF THE CASCADES
THURSDAY THROUGH THE END OF THE WEEK. AN INVERSION WILL DEVELOP OVER
THE REGION AND AN AIR STAGNATION ADVISORY HAS BEEN ISSUED FOR MUCH
OF THE FORECAST AREA BELOW 3500 FEET FROM THURSDAY MORNING THROUGH
SATURDAY AFTERNOON. SEE PRODUCT PDXNPWPDT FOR FURTHER DETAILS.
FREEZING FOG WILL BE PATCHY ON CHRISTMAS EVE IN THE COLUMBIA BASIN
AND CENTRAL OREGON BUT WILL INCREASE IN AREAL COVERAGE BY SATURDAY.
THE STRONG HIGH PRESSURE RIDGE WILL EVENTUALLY WEAKEN AND ALLOW
PACIFIC MOISTURE TO SPREAD ACROSS THE AREA EARLY NEXT WEEK FOR A
SLIGHT CHANCE TO A CHANCE OF WINTER PRECIPITATION.
.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.
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