Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 36, NWS Salt Lake City, UT

July 5, 1998Washington County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 5, 1998, 7:38 AM MDT for Washington County, Utah. It was in force for 52 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, 7:38 AM MDT (13:38 UTC)
Expired
Jul 5, 1998, 8:30 AM MDT
In force
52 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Washington County, UT

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 1.6 hours before the alert went out and 214 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, Mercury/Desert R, NV at 12:00Z on 1998-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Mercury/Desert R, NV at 12:00Z on 1998-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.1939587897Sfc1 km3 km6 km9 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3389 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

575 
WUUS1 KSLC 051342 RRA
SVRSLC
UTC053-051430-

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     SOUTHERN WASHINGTON COUNTY IN UTAH
     INCLUDING ST GEORGE

   * UNTIL 830 AM MDT

   * AT 731 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM 26 MILES SOUTHWEST OF ST GEORGE...MOVING
     NORTHEAST AT 40 MILES PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE WASHINGTON...
     TOQUERVILLE...SANTA CLARA...GUNLOCK AND HURRICANE

   * SEVERE THUNDERSTORM WILL BE...
     13 MILES SOUTHWEST OF ST GEORGE AT 750 AM MDT
    
STRONG WINDS IN EXCESS OF 60 MPH ARE LIKELY FROM THIS STORM. 



LAT...LON 3701 11401 3700 11321 3735 11323 3740 11400

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 8:27 AM MDTSevere Thunderstorm WarningSLCIron, Kane, Washington63 min
Jul 5, 11:02 AM MDTSevere Thunderstorm WarningSLCGarfield28 min
Jul 5, 11:14 AM MDTSevere Thunderstorm WarningSLCGarfield21 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.