Severe Thunderstorm Warning 9, NWS Pendleton, OR

Issued

Jul 7, 2002, 6:31 PM PDT (01:31 UTC)

Expired

Jul 7, 2002, 7:15 PM PDT

In force

44 min

Issued by

NWS Pendleton, OR

Area

Counties, with a storm outline in the text

Counties Umatilla County, OR, Union County, OR

The Pendleton radar (KPDT), 41 km from the middle of the area, began a volume at 01:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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.

138 
WUUS56 KPDT 080131
SVRPDT
ORC059-061-080215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENDLETON OR
628 PM PDT SUN JUL 7 2002

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN UMATILLA COUNTY IN NORTHEAST OREGON
  WEST CENTRAL UNION COUNTY IN NORTHEAST OREGON

* UNTIL 715 PM PDT

* AT 628 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF MEACHAM...OR ABOUT 20
  MILES WEST OF LA GRANDE...MOVING NORTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  THORN HOLLOW AT 645 PM PDT AND WILL MOVE ACROSS RURAL EASTERN 
  UMATILLA AND WEST CENTRAL UNION COUNTIES BETWEEN 650 AND 715 PM.

LAT...LON 4525 11865 4522 11839 4566 11825 4570 11856

NWS Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 2:35 PM PDT, 3 hours 56 minutes earlier.

NORTHEAST OREGON/SOUTHEAST WASHINGTON FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
235 PM PDT SUN JUL 7 2002

A LOW PRESSURE SYSTEM HAS MOVED ONSHORE...AND STARTING TO CROSS OVER
TO THE EAST SIDE OF THE CASCADES. CONVECTIVE SHOWERS ARE FORMING
ALONG THE EAST SLOPES OF THE CASCADES...SOUTH OF MADRAS AND NORTH
OF JOHN DAY EXTENDING INTO THE BLUE MOUNTAINS AS SEEN ON SATELLITE
IMAGERY AND RADAR. THIS SYSTEM IS VERY UNSTABLE AND MOIST...AND THE
SHOWER AND THUNDERSTORM ACTIVITY WILL LAST THROUGH TONIGHT. SOME OF
THESE THUNDERSTORMS ALSO HAVE THE POTENTIAL OF BECOMING SEVERE WITH
HIGH WINDS...HEAVY RAINS AND HAIL. SOME SHOWERS MAY LINGER INTO THE
THE EARLY MORNING HOURS. HOWEVER...DRY AND COOLER TEMPERATURES WILL
FOLLOW TOMORROW AS A RIDGE BEGINS TO BUILD INTO THE PACIFIC
NORTHWEST ON MONDAY. BY TUESDAY...THE TEMPERATURE WILL START TO WARM
AGAIN. PALMER

EXTENDED...A RIDGE WILL BE OVER THE AREA THROUGH THURSDAY PROVIDING
SUNNY SKIES AND INCREASING TEMPERATURES. AS THE RIDGE SHIFTS EAST ON
THURSDAY EVENING AND FRIDAY MOISTURE WILL MIGRATE NORTHWARD IN THE
THE AREA AROUND THE EDGE OF THE RIDGE. THIS MOISTURE AND THE
RECEDING RIDGE WILL INCREASE THE INSTABILITY OVER CENTRAL OREGON...
THE OCHOCOS AND THE BLUE MOUNTAINS. SOME AFTERNOON AND EVENING
THUNDERSTORMS MAY DEVELOP. THE REST OF THE AREA WILL REMAIN HOT AND
DRY. BY SATURDAY THE 850 MB TEMPERATURES AND VARIOUS THICKNESS
VALUES WILL DECREASE SLIGHTLY SUGGESTING THAT TEMPERATURES WILL DROP
SLIGHTLY.  COONFIELD

PDT 3200  ALW 3200  PSC 3000  YKM 3000

KPDT...VCP32/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; radar from the NEXRAD Level II archive.