Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 39, NWS Salt Lake City, UT

July 5, 1998Garfield County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 5, 1998, 11:14 AM MDT for Garfield County, Utah. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 5, 1998, 11:14 AM MDT (17:14 UTC)
Expired
Jul 5, 1998, 11:35 AM MDT
In force
21 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Garfield County, UT

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 5.2 hours before the alert went out and 282 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Flgstf/Belemont, AZ at 12:00Z on 1998-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 162 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 1998-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 km3 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
162 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
898 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSLC 051714 RRA
SVRSLC
UTC017-051735-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1114 AM MDT SUN JUL 5 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     CENTRAL GARFIELD COUNTY IN UTAH

   * UNTIL 1135 AM MDT

   * AT 1110 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
     A SEVERE THUNDERSTORM OVER SOUTH CENTRAL GARFIELD COUNTY...OR
     ABOUT 15 MILES EAST OF BRYCE CYN NP...MOVING NORTHEAST AT 30
     MILES PER HOUR.

THIS SEVERE THUNDERSTORM WILL REMAIN OVER REMOTE AREAS OF GARFIELD 
COUNTY WEST OF ESCALANTE.  

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

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

LAT...LON 3767 11201 3756 11183 3790 11149 3803 11172

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 7:38 AM MDTSevere Thunderstorm WarningSLCWashington52 min
Jul 5, 8:27 AM MDTSevere Thunderstorm WarningSLCIron, Kane, Washington63 min
Jul 5, 11:02 AM MDTSevere Thunderstorm WarningSLCGarfield28 min
Jul 5, 12:02 PM MDTSevere Thunderstorm WarningSLCSevier28 min
Jul 5, 12:27 PM MDTSevere Thunderstorm WarningSLCJuab43 min
Jul 5, 2:19 PM MDTSevere Thunderstorm WarningSLCSummit, Wasatch41 min
Jul 5, 3:08 PM MDTFlash Flood WarningSLCKane62 min
Jul 5, 3:08 PM MDTSevere Thunderstorm WarningSLCKane62 min

Nearby

Severe Thunderstorm Warnings in Utah, 1998Every severe thunderstorm warning in 1998

Sources

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.