HAZARDOUS WEATHER OUTLOOK
Issue Date: 1230 PM PST FRI JAN 1 2010
Expiration: 615 AM PST SAT JAN 02 2010
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...THIS AFTERNOON AND TONIGHT
STRONG WIND THROUGH THIS AFTERNOON
GRANDE RONDE VALLEY
TIGHT PRESSURE AND TEMPERATURE GRADIENTS BETWEEN THE BAKER AND
GRANDE RONDE VALLEYS WILL CONTINUE TO CAUSE STRONG WINDS IN MAINLY
SOUTHERN UNION COUNTY TODAY. A WIND ADVISORY WILL REMAINS IN EFFECT
THERE THROUGH 4 PM THIS AFTERNOON. PLEASE REFER TO PRODUCT ID
PDXNPWPDT FOR MORE DETAILS.
A COLD FRONT MOVED THROUGH THE REGION THIS MORNING WITH PARTIALLY
CLEARING SKIES IN CENTRAL AND NORTHEAST OREGON. SCATTERED RAIN AND
SNOW SHOWERS WILL BE POSSIBLE ACROSS THE FORECAST AREA THROUGH THIS
AFTERNOON WITH DRIER CONDITIONS BEGINNING TONIGHT. A POOL OF COLD
AIR WILL REMAIN ENTRAPPED IN THE LOWER COLUMBIA BASIN DUE TO A LOW
LEVEL TEMPERATURE INVERSION THROUGH TONIGHT WITH ATTENDANT LOW
CLOUDS AND PATCHY FOG CHANGING TO FREEZING FOG OVERNIGHT.
TONIGHT CONDITIONS WILL BECOME INACTIVE THOUGH THERE COULD STILL BE
LIGHT RAIN OR SNOW SHOWERS OVER THE CASCADE EAST SLOPES AND OVER
THE NORTHEAST AND CENTRAL OREGON MOUNTAINS.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
UNSETTLED CONDITIONS WILL PERSIST THROUGH THE WEEKEND INTO NEXT WEEK
WITH ONE PACIFIC WEATHER SYSTEM AFTER ANOTHER. THE LATEST MODELS ARE
STILL HINTING AT SOME COLDER AIR TO BE BROUGHT DOWN FROM THE NORTH
BY THE MIDDLE TO END OF NEXT WEEK AS AN UPPER RIDGE BUILDS OVER
WESTERN OREGON AND WASHINGTON WITH A COLD NORTHERLY FLOW ON THE EAST
SIDE OF THE UPPER RIDGE AXIS OVER THE FORECAST AREA. HOWEVER AT THIS
TIME AM NOT EXPECTING ANY SIGNIFICANT ARCTIC AIR.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON IN THE GRANDE
RONDE VALLEY FOR STRONG WINDS.
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.
|
|
|
