Severe Thunderstorm Warning 11, NWS Pendleton, OR

Issued

Jul 7, 2002, 7:52 PM PDT (02:52 UTC)

Expired

Jul 7, 2002, 8:30 PM PDT

In force

38 min

Issued by

NWS Pendleton, OR

Area

Counties, with a storm outline in the text

County Franklin County, WA

The Pendleton radar (KPDT), 94 km from the middle of the area, began a volume at 02:52 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.

594 
WUUS56 KPDT 080252
SVRPDT
WAC021-080330-

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

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND NORTHERN FRANKLIN COUNTY IN SOUTH CENTRAL WASHINGTON

* UNTIL 830 PM PDT

* AT 749 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 13 MILES SOUTH OF MESA...OR ABOUT 11 MILES
  NORTHEAST OF PASCO...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CONNELL AT 800 PM PDT
  KAHLOTUS AT 810 PM PDT

THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL AND STRONG WIND GUSTS 
UP TO 75 MPH.  THE STRONG WINDS FROM THIS STORM WILL ALSO PRODUCE 
BLOWING DUST THAT CAN REDUCE VISIBILITIES DOWN TO ONE QUARTER OF A 
MILE.

LAT...LON 4647 11926 4627 11888 4673 11848 4673 11906

NWS Pendleton, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 7, 2:35 PM PDT, 5 hours 17 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 Washington, 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.