Severe Thunderstorm Warning 18, NWS Pendleton, OR

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
330 PM PDT WED JUN 27 2001

DECREASING CLOUDS THIS AFTERNOON ALLOWED SOLAR HEATING OF THE
RESIDUAL MOISTURE IN THE LOWER AND MID LEVELS IN EASTERN OREGON AND
WASHINGTON. THE DRIER AIR ALSO PROVIDED SOME INSTABILITY AND
HELPED SPAWN THUNDERSTORM ACTIVITY...FROM THE EAST SLOPES OF THE
CASCADES THROUGH THE BLUE MOUNTAINS. ONE INCH HAIL AND SOME WIND
DAMAGE WAS REPORTED IN YAKIMA COUNTY FROM A SEVERE THUNDERSTORM. THE
WARNING FOR THAT STORM HAS EXPIRED. THE STORMS WILL CONTINUE MOVING
NORTHEAST IN THE RATHER STRONG SOUTHWEST FLOW ALOFT AND SHOULD
DISSIPATE AROUND SUNSET WHEN THE SOLAR HEATING DIMINISHES. OTHERWISE
EXPECT SCATTERED SHOWERS TONIGHT. WITH MORE DRY AIR ALOFT
TOMORROW...CLOUDS SHOULD DIMINISH WITH ONLY ISOLATED SHOWERS
LINGERING OVER THE EASTERN MOUNTAINS. WILL CONTINUE CARRYING
ISOLATED THUNDERSTORMS OVER THE BLUE MOUNTAINS THURSDAY AFTERNOON AS
THE SOUTHWEST FLOW WILL PROVIDE UPSLOPE FLOW INTO THE BLUES DURING
MAXIMUM HEATING. AFTERNOON HIGH TEMPERATURES WILL BE ABOUT THE SAME
AS TODAY...AS THE CLOSED LOW ALOFT STAYS OFF THE SOUTHWEST COAST OF
BRITISH COLUMBIA...AND THE ASSOCIATED COOLER AIR CONTINUES TO FLOW
OVER THE PACIFIC NW. TEMPERATURES WILL BEGIN TO REBOUND FRIDAY WITH
HIGH PRESSURE BUILDING IN FROM THE SOUTHWEST U.S.  FARMER

PDT 4100  ALW 4100  PSC 4100  YKM 41200

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

.KPDT...NONE.