Expires:201010211230;Remove:201010211230;250678 WWUS86 KPDT 202041 SPSPDT SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PENDLETON OR 141 PM PDT WED OCT 20 2010 ORZ041>044-049-050-501>506-WAZ024-026>030-501-502-211230- EASTERN COLUMBIA RIVER GORGE OF OREGON-NORTH CENTRAL OREGON- CENTRAL OREGON-LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY- WALLOWA COUNTY-FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON- NORTHERN BLUE MOUNTAINS OF OREGON- SOUTHERN BLUE MOUNTAINS OF OREGON- NORTHERN WHEELER AND SOUTHERN GILLIAM COUNTIES-JOHN DAY BASIN- OCHOCO-JOHN DAY HIGHLANDS- EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY- YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON- FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON- NORTHWEST BLUE MOUNTAINS OF WASHINGTON- EAST SLOPES OF THE CENTRAL CASCADES OF WASHINGTON- EAST SLOPES OF THE SOUTHERN CASCADES OF WASHINGTON- INCLUDING THE CITIES OF...THE DALLES...DUFUR...MADRAS...MAUPIN... MORO...BEND...LA PINE...PRINEVILLE...REDMOND...ARLINGTON... BOARDMAN...HERMISTON...LA GRANDE...ELGIN...UNION...ENTERPRISE... JOSEPH...WALLOWA...HEPPNER...PENDLETON...MEACHAM...TOLLGATE... UKIAH...CONDON...FOSSIL...SPRAY...JOHN DAY...MONUMENT... DAYVILLE...LONG CREEK...MITCHELL...SENECA...WHITE SALMON... ELLENSBURG...SUNNYSIDE...YAKIMA...CONNELL...PROSSER... TRI-CITIES...DAYTON...WAITSBURG...WALLA WALLA...CLE ELUM... EASTON...ROSLYN...NACHES...GOLDENDALE...APPLETON...TROUT LAKE... BICKLETON 141 PM PDT WED OCT 20 2010 ...COOLER AUTUMN TYPE WEATHER CONDITIONS OVER THE WEEKEND... A CHANGE IN THE WEATHER PATTERN WILL OCCUR THIS WEEKEND BRINGING THE SEASONS FIRST AUTUMN TYPE WEATHER TO THE REGION. HIGH PRESSURE THAT HAS PERSISTED OVER THE REGION WILL BREAK DOWN ALLOWING A TRANSITION TO A COOLER AND WET WEATHER PATTERN. A SERIES OF FAST MOVING WEATHER SYSTEMS WILL IMPACT THE FORECAST AREA OVER THE WEEKEND BEGINNING ON FRIDAY. EACH SUCCESSIVE SYSTEM WILL BRING AN INCREASING CHANCE OF RAIN AND COOLER CONDITIONS CULMINATING IN A COOL AND RAINY SUNDAY. PRECIPITATION AMOUNTS OF OVER AN INCH WILL BE POSSIBLE IN THE MOUNTAINS WITH LESSER AMOUNTS THROUGHOUT THE COLUMBIA BASIN. SNOW LEVELS WILL LOWER TO AROUND 4000 FEET SUNDAY NIGHT BRINGING THE SEASONS FIRST SIGNIFICANT SNOW ACCUMULATIONS TO THE MOUNTAINS. $$