HAZARDOUS WEATHER OUTLOOK Issue Date: 520 AM PST SAT DEC 26 2009 Expiration: 515 AM PST SUN DEC 27 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
AIR STAGNATION ADVISORY
EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON, EAST SLOPES
OF THE SOUTHERN CASCADES OF WASHINGTON, EASTERN COLUMBIA RIVER
GORGE OF WASHINGTON, KITTITAS VALLEY, YAKIMA VALLEY, LOWER
COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS
OF WASHINGTON, EASTERN COLUMBIA RIVER GORGE OF OREGON, NORTH
CENTRAL OREGON, CENTRAL OREGON, LOWER COLUMBIA BASIN OF
OREGON, GRANDE RONDE VALLEY, FOOTHILLS OF THE BLUE MOUNTAINS
OF OREGON, NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES,
JOHN DAY BASIN
THE COMBINATION OF A STRONG HIGH PRESSURE RIDGE ALOFT WITH LIGHT
SURFACE WINDS AND STRONG SURFACE BASED TEMPERATURE INVERSIONS HAS
LEAD TO STAGNANT AIR CONDITIONS WITH INCREASING TRAPPED POLLUTANTS
IN THE AREAS LISTED ABOVE. AS SUCH AN AIR STAGNATION ADVISORY IS IN
EFFECT FOR THESE AREAS. PLEASE REFER TO PDXNPWPDT FOR MORE DETAILS.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
STRONG TEMPERATURE INVERSIONS WILL KEEP PATCHY FOG AND LOW STRATUS
OVER MUCH OF THE AREA THROUGH TUESDAY. MULTIPLE WEATHER SYSTEMS ARE
EXPECTED TO MOVE THROUGH THE REGION LATER THIS WEEK...WITH
INCREASING PRECIPITATION CHANCES TUESDAY THROUGH FRIDAY.
.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.
|
|
|