Severe Thunderstorm Warning 22, NWS Pendleton, OR

Issued

Jul 14, 2002, 7:04 PM PDT (02:04 UTC)

Expired

Jul 14, 2002, 7:30 PM PDT

In force

26 min

Issued by

NWS Pendleton, OR

Area

Counties, with a storm outline in the text

County Grant County, OR

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

709 
WUUS56 KPDT 150204
SVRPDT
ORC023-150230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
701 PM PDT SUN JUL 14 2002

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL GRANT COUNTY IN EAST CENTRAL OREGON

* UNTIL 730 PM PDT

* AT 701 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES SOUTH OF SENECA...OR ABOUT 4 MILES
  SOUTHWEST OF SILVIES...MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SILVIES AT 710 PM PDT
  SENECA AT 720 PM PDT

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH THIS
STORM. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS PASSED.

LAT...LON 4394 11917 4382 11899 4412 11850 4424 11903

NWS Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 14, 2:30 PM PDT, 4 hours 34 minutes earlier.

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
230 PM PDT SUN JUL 14 2002

SATELLITE PICTURES SHOW BUILD UPS AND A FEW THUNDERSTORMS FORMING
OVER SOUTHEAST OREGON.  THESE ARE FORMING AHEAD OF COOL FRONT THAT
IS STALLING OVER THE BLUE MOUNTAINS.  THIS WILL ALLOW MOISTURE TO
LINGER OVER THE MOUNTAINS OF NORTHEAST OREGON FOR THE NEXT SEVERAL
DAYS.  UPPER TROUGH REMAINS ALONG THE WEST COAST WITH SOUTHWEST FLOW
OVER THE OREGON PORTION OF FORECAST AREA.  THIS SOUTHWEST FLOW WILL
ALLOW SEVERAL DISTURBANCE TO MOVE OVER THE MOUNTAINS AND INTERACT
WITH MOISTURE AND DAYTIME HEAT TO PRODUCE ISOLATED THUNDERSTORMS
THROUGH TUESDAY.  ON WEDNESDAY...A WEAK SHORTWAVE WILL MOVE
NORTHEAST OVER THE REGION AND BRING ANOTHER PUSH OF MOISTURE...BUT
IT APPEARS VERY LIMITED.  SO WILL ONLY HAVE A SLIGHT CHANCE OF
THUNDERSTORMS OVER MOUNTAINS.  TEMPERATURES TO WARM A FEW DEGREES
EACH DAY. LOHMANN

EXTENDED...ZONAL FLOW ALOFT AND DRY AIR WILL PREVENT ANY SIGNIFICANT
PRECIPITATION FROM FALLING THROUGH SATURDAY. PORTIONS OF CENTRAL
WASHINGTON WILL GRADUALLY SEE AN INCREASE IN CLOUD COVER BEGINNING
FRIDAY AS ANOTHER...WEAK LOW PRESSURE AREA APPROACHES THE COAST OF
SOUTHEASTERN ALASKA. AS THE LOW APPROACHES...IT WILL INDUCE A
SOUTHWESTERLY SLIGHT SOUTHWESTERLY FLOW OVER THE NORTHWEST ON
SUNDAY. THIS...COUPLED WITH AN APPROACHING MARINE PUSH WILL INDUCE
INSTABILITY OVER THE NORTHEAST MOUNTAINS AND ENOUGH MOISTURE IS
EXPECTED FOR ISOLATED AFTERNOON THUNDERSTORMS. MODEL TIMING OF THIS
PUSH SEEMS REASONABLE BASED ON THE FREQUENCY OF RECENT MARINE
PUSHES. HENRY

PDT 11--  ALW 11--  PSC 1000  YKM 0000

KPDT...VCP21/CSR21...OPERATIONAL.

.KPDT...NONE.

Severe Thunderstorm Warnings in Oregon, 2002Every severe thunderstorm warning in 2002

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.