High Wind in Oregon, June 1, 2001

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
245 PM PDT FRI JUN 1 2001

THE FRONT IS OVER EASTERN WASHINGTON AND OREGON. SHOWERS AND
THUNDERSTORMS POPPED UP OVER CENTRAL OREGON AND ARE NOW MOVING
NORTHEAST INTO THE FOOTHILLS OF THE BLUES AND LOWER COLUMBIA BASIN
IN WASHINGTON AND OREGON. WINDS ARE ALREADY OVER 25 MPH IN MOST OF
THE AREA EXCEPT THE EASTERN BLUES AND WALLOWAS. THE BLOWING DUST
ADVISORY ISSUED FOR THE COLUMBIA BASIN AND BLUE MOUNTAIN FOOTHILLS
HAS BEEN EXTENDED UNTIL 06Z.

THE GRADIENT BEHIND THE FRONT WILL SLOWLY DECREASE TONIGHT WITH THE
WINDS DECREASING BY MIDNIGHT IN MOST AREAS. SHOWERS AND
THUNDERSTORMS WILL GRADUALLY START DEVELOPING FARTHER EAST AS THE
FRONT CONTINUES TO MOVE EAST. COVERAGE WILL ALSO DECREASE AFTER
SUNSET EXCEPT IN THE MOUNTAINS WHERE SHOWERS WILL LINGER UNTIL
MIDNIGHT.

THE BROAD UPPER LEVEL TROUGH WILL REMAIN OVER THE AREA SATURDAY FOR
UNSETTLED WEATHER WITH A CHANCE OF SHOWERS LINGERING OVER THE
FOOTHILLS AND MOUNTAINS...MAINLY IN THE EAST. THE WINDS WILL
INCREASE IN THE AFTERNOON OVER THE LOWER COLUMBIA BASIN AND
FOOTHILLS OF THE BLUES WITH PASSAGE OF AN UPPER LEVEL DISTURBANCE.
IF THE TIMING OF THE DISTURBANCE IS OFF SO THAT THE PASSAGE DOES NOT
COINCIDE WITH AFTERNOON HEATING...THE WINDS MAY NOT BECOME BREEZY.
HOWEVER THEY STILL WILL INCREASE...SO I LEFT CURRENT BREEZY FORECAST
INTACT.

SATURDAY NIGHT AND SUNDAY THE UPPER LEVEL RIDGE WILL BUILD OVER THE
AREA FOR CLEARING SKIES.   COONFIELD

IN THE EXTENDED...MID RANGE MODELS COMING INTO LINE INDICATING AN
UPPER LEVEL LOW OVER THE GULF OF ALASKA WITH AN UPPER RIDGE OVER THE
INTERIOR WEST. THIS LEAVES THE PACIFIC NORTHWEST UNDER A MOSTLY DRY
SOUTHWEST FLOW OFF OF THE PACIFIC OCEAN. THUS EXPECT DRY AND WARM
CONDITIONS TO RETURN NEXT WEEK. IT IS TOO EARLY TO TRY TO ANTICIPATE
OCCURRENCES OF AFTERNOON/EVENING CONVECTION WITH ANY CERTAINTY AT
THE MOMENT...BUT CAN NOT BE BLIND TO DEVELOPMENT MID TO LATE WEEK.
GKH

PDT 211  ALW 211  PSC 210  YKM 100

.KPDT...WSR-88D...VCP21/CSR21...OPERATIONAL.

.KPDT...BLOWING DUST ADVISORY THIS EVEN4ING FOR WASHINGTON ZONES 28
AND 29 AND OREGON ZONES 44 AND 45.