Severe Thunderstorm Warning 9, NWS Pocatello, ID

Issued

Jul 18, 2002, 6:26 PM MDT (00:26 UTC)

Expired

Jul 18, 2002, 7:30 PM MDT

In force

64 min

Issued by

NWS Pocatello, ID

Area

Counties, with a storm outline in the text

County Fremont County, ID

The Pocatello radar (KSFX), 163 km from the middle of the area, began a volume at 00:29 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.

445 
WUUS55 KPIH 190026
SVRPIH
IDC043-190130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
626 PM MDT THU JUL 18 2002

THE NATIONAL WEATHER SERVICE IN POCATELLO/IDAHO FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN FREMONT COUNTY IN SOUTHEAST IDAHO

* UNTIL 730 PM MDT

* AT 619 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER DRUMMOND...OR ABOUT 10 MILES SOUTHEAST OF
  ASHTON...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WARM RIVER AT 645 PM MDT

LARGE HAIL...INTENSE RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH 
THIS STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM 
PASSES.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE 
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN POCATELLO/IDAHO FALLS.

LAT...LON 4431 11150 4392 11141 4396 11106 4435 11104

NWS Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 3:20 PM MDT, 3 hours 6 minutes earlier.

SOUTHEAST IDAHO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
320 PM MDT THU JUL 18 2002

MID LEVEL MSTR CONTINUES TO STREAM INTO ID FROM THE SE AROUND THE
UPPER LOW OVR N CEN CA.  CONVECTION OCCURRING OVR MOST OF THE HIGHER
ELEVATIONS IN RESPONSE TO THE AFTN INSTABILITY.  PW VALUES IN EXCESS
OF 1 INCH HAVE CREATED THE POTENTIAL FOR LOCALLY HEAVY RAINFALL
AMOUNTS ...AS THE CELLS HAVE TRENDED TO MOVE SLOWLY OR EVEN BACKBUILD.
THIS TREND SHOULD CONTINUE INTO THE EVENING...BUT BELIEVE THE THREAT
TO REMAIN LOCALIZED.  THUS...WILL NOT GO WITH A FLASH FLOOD WATCH.

AS UPPER LOW BEGINS TO BREAK DOWN AND DRIFT TO THE NE...CONVECTION
WILL AGAIN BE POSSIBLE ON FRI...BUT MODELS PROJECTING MOST OF THE MSTR
TO BE OVER THE NRN CWA.   WILL CARRY THE HIGHEST POPS OVR THE CEN MTNS
AND NE HIGHLANDS.  LINGERING MSTR OVR NE HIGHLANDS ON SAT WILL GIVE A
CONTINUED CHANCE FOR CONVECTIVE ACTIVITY IN THE AFTN/EVE...BUT
COVERAGE SHOULD BE LIMITED.

ANOTHER MINOR WAVE IN THE UPPER FLOW MAKES ITS WAY INTO SE ID ON TUE.
THIS SHOULD BE GOOD FOR ANOTHER THREAT OF CONVECTION...BUT NOT AS
WIDESPREAD AS THE CURRENT EVENT.  UPPER HIGH/RIDGE BEGINS TO BUILD
BACK INTO THE 4 CORNERS AREA BY WED.  THIS SHOULD LEAVE SE ID DRY AND
A LITTLE WARMER.

HEDGES

.KSFX...OPERATIONAL...VCP 11

BYI 60/85/56 620

.PIH...NONE.

PIH BB 060/087 055/086 086 07422

Severe Thunderstorm Warnings in Idaho, 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.