Severe Thunderstorm Warning 27, NWS Salt Lake City, UT

Issued

Jul 27, 2002, 1:39 PM MDT (19:39 UTC)

Expired

Jul 27, 2002, 2:00 PM MDT

In force

21 min

Issued by

NWS Salt Lake City, UT

Area

Counties, with a storm outline in the text

County Emery County, UT

The Cedar City radar (KICX), 191 km from the middle of the area, began a volume at 19:39 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.

150 
WUUS55 KSLC 271939
SVRSLC
UTC015-272000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
137 PM MDT SAT JUL 27 2002

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN EMERY COUNTY IN UTAH

* UNTIL 200 PM MDT

* AT 129 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SOUTHWESTERN EMERY COUNTY...OR ABOUT 30
  MILES NORTHEAST OF LOA.  THE STORM WAS NEARLY STATIONARY.

LARGE HAIL AND HEAVY RAIN ARE LIKELY FROM THIS STORM. THE STORM IS 
ABOUT 10 MILES SOUTH OF INTERSTATE 70 NEAR MILE MARKER 100.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN SALT LAKE CITY.

LAT...LON 3878 11120 3864 11134 3848 11113 3866 11095

NWS Salt Lake City, UT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 27, 10:15 AM MDT, 3 hours 24 minutes earlier.

UTAH AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1015 AM MDT SAT JUL 27 2002

.SYNOPSIS...A BAND OF MOIST AND UNSTABLE AIR REMAINS OVER CENTRAL
AND EASTERN UTAH TODAY. A COOL FRONT WILL REACH THE UTAH IDAHO
BORDER BY LATE THIS AFTERNOON THEN PUSH ACROSS THE AREA TONIGHT. A
DRY AND COOLER AIR MASS WILL BE OVER THE AREA SUNDAY.

.DISCUSSION...STILL A FAIR AMOUNT OF MOISTURE OVER MUCH OF THE AREA
THIS MORNING...ESPECIALLY THE SOUTHEAST.  SOME CONVERGENCE REMAINS
IN AN E-W BOUNDARY ACROSS THE CENTRAL PART OF UT BUT MODELS INDICATE
IT WILL GET LESS ORGANIZED AS THE DAY PROGRESSES. BUT IT REMAINS
UNSTABLE OVER MUCH OF THE AREA TODAY WITH THE BEST INSTABILITY AND
CAPE VALUES IN EAST CENTRAL UTAH...OVER THE BOOK CLIFFS AND SAN
RAFAEL SWELL.  MM5 BASED ON THE 00Z ETA SHOWS A BAND OF CONVECTION
ABOUT 100 MILES WIDE DEVELOPING BY MID AFTERNOON CENTERED ALONG A
LINE FROM NEAR GJT TO A LITTLE NORTH OF ELY WITH SOME SCATTERED
ACTIVITY ELSEWHERE.  HOWEVER ACTIVITY SHOULD BE WEAKER AND LESS
ORGANIZED THAT WE SAW YESTERDAY AS THE JET THAT PUSHED ACROSS
CENTRAL UT YESTERDAY SAGS OUT OF THE AREA TO MAKE WAY FOR THE POLAR
BRANCH SHORTWAVE THAT IS DIGGING INTO THE NORTHERN INTERMOUNTAIN
REGION.

THE MM5 ALSO SHOWED A BAND OF WEAK CONVECTION DEVELOPING ALONG THE
COLD FRONT ASSOCIATED WITH THAT SHORTWAVE.  THE FRONT MOVES INTO
THE EXTREME NORTHERN PORTION OF THE AREA BY LATE AFTERNOON. THAT
CONVECTION MAY BE OVERDONE A LITTLE ESPECIALLY WEST OF ABOUT I-15.
BUT THE IDEA ISNT BAD.  THE FRONT WILL PUSH ACROSS MOST OF THE AREA
BY EARLY SUNDAY BRINGING DRY STABLE AIR BEHIND IT. CURRENT FORECASTS
COVER THE SITUATION WELL SO NO UPDATES NEEDED AT THIS TIME.

SLC 1-0 CDC 210 SANDERS

.SLC...NONE

Severe Thunderstorm Warnings in Utah, 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.