Hazardous Weather Outlook

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
446 AM PDT FRI MAY 24 2013

ORZ041-044-049-050-502-503-505>507-WAZ024-026>030-520-521-251200-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
LOWER COLUMBIA BASIN OF OREGON-GRANDE RONDE VALLEY-WALLOWA COUNTY-
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-JOHN DAY BASIN-OCHOCO-
JOHN DAY HIGHLANDS-
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
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 WASHINGTON CASCADES-SIMCOE HIGHLANDS-
446 AM PDT FRI MAY 24 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
OREGON...NORTH CENTRAL OREGON...NORTHEAST OREGON...CENTRAL
WASHINGTON...SOUTH WASHINGTON...SOUTH CENTRAL WASHINGTON AND
SOUTHEAST WASHINGTON.

.DAY ONE...TODAY AND TONIGHT

THE ATMOSPHERE WILL BECOME UNSTABLE THIS AFTERNOON AND EARLY THIS
EVENING AS AN UPPER LOW PRESSURE SYSTEM LINGERS OVER THE AREA
THROUGH THE DAY. THIS WILL RESULT IN POSSIBLE AFTERNOON AND EARLY
EVENING THUNDERSTORMS. SOME OF THE STRONGER THUNDERSTORMS MAY
CONTAIN SMALL HAIL...GUSTY WINDS AND HEAVY RAIN.

IN ADDITION THERE WILL BE SNOW SHOWERS OVER CENTRAL OREGON...THE
NORTHERN BLUE MOUNTAINS AND IN WALLOWA COUNTY OREGON WHERE 1 TO 3
INCHES OF SNOW MAY ACCUMULATE ABOVE 4000 TO 4500 FEET THIS
MORNING. SNOW LEVELS WILL RISE TO 5000 TO 5500 FEET BY AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

ANOTHER LOW PRESSURE SYSTEM WILL MOVE INTO THE REGION BY LATE
SATURDAY AND CONTINUE THROUGH AT LEAST MONDAY. THIS SYSTEM MAY
PRODUCE ISOLATED AFTERNOON AND EVENING THUNDERSTORMS AGAIN EACH
DAY SATURDAY THROUGH MONDAY OVER EASTERN AND SOUTHERN AREAS.

$$