000 
FLUS46 KPDT 031107
HWOPDT

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT MON OCT 3 2005

WAZ024>030-ORZ041>050-041100-
EAST SLOPES OF THE SOUTHERN CASCADES-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
NORTHWEST BLUE MOUNTAINS-EASTERN COLUMBIA RIVER GORGE OF OREGON-
NORTH CENTRAL OREGON-CENTRAL OREGON-
LOWER COLUMBIA BASIN OF OREGON-
FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-BLUE MOUNTAINS-
JOHN DAY BASIN-OCHOCO-JOHN DAY HIGHLANDS-GRANDE RONDE VALLEY-
WALLOWA COUNTY-
400 AM PDT MON OCT 3 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON
AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS
     EAST COLUMBIA RIVER GORGE OF WASHINGTON, EAST SLOPES OF THE 
     SOUTHERN CASCADES, KITTITAS VALLEY, YAKIMA VALLEY, LOWER 
     COLUMBIA BASIN OF WASHINGTON, FOOTHILLS OF THE BLUE MOUNTAINS 
     OF WASHINGTON, NORTHWEST BLUE MOUNTAINS, EASTERN COLUMBIA 
     RIVER GORGE OF OREGON, NORTH CENTRAL OREGON, CENTRAL OREGON, 
     LOWER COLUMBIA BASIN OF OREGON, FOOTHILLS OF THE BLUE 
     MOUNTAINS OF OREGON, BLUE MOUNTAINS, JOHN DAY BASIN, 
     OCHOCO-JOHN DAY HIGHLANDS, GRANDE RONDE VALLEY, WALLOWA COUNTY 

AN UPPER TROUGH WITH A COLD AIR POOL ALOFT WILL CREATE AN UNSTABLE 
ATMOSPHERE WHEN COMBINED WITH SURFACE HEATING THIS AFTERNOON. THIS 
WILL CAUSE ISOLATED THUNDERSTORMS TO DEVELOP...WHICH WILL DISSIPATE 
AT DUSK.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

A PROGRESSIVE PATTERN WILL PERSIST WITH FREQUENT TROUGHS AND RIDGES. 
THIS WILL CREATE ALTERNATING PERIODS OF DRY AND SHOWERY CONDITIONS 
WITH SEASONAL TEMPERATURES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

PROTOTYPE GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS
ARE DISPLAYED ON THE WORLD WIDE WEB AT:

WEATHER.GOV/PENDLETON

AND SELECT GRAPHICAL HAZARDS.

$$