Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 40, NWS Salt Lake City, UT

July 5, 1998Sevier County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 5, 1998, 12:02 PM MDT for Sevier County, Utah. It was in force for 28 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, 12:02 PM MDT (18:02 UTC)
Expired
Jul 5, 1998, 12:30 PM MDT
In force
28 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Sevier County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 6.0 hours before the alert went out and 227 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, Salt Lake City I, UT 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, Salt Lake City I, UT at 12:00Z on 1998-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 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
4068 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
142 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.

000 
TTAA00 KSLC 051804 COR
SVRSLC
UTC041-051830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1202 PM MDT SUN JUL 5 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     CENTRAL SEVIER COUNTY IN UTAH
     INCLUDING RICHFIELD

   * UNTIL 1230 PM MDT

   * AT 1151 AM MDT THE PUBLIC REPORTED A SEVERE THUNDERSTORM        
     5 MILE SOUTHWEST OF RICHFIELD...MOVING NORTHEAST AT 40 MILES    
     PER HOUR.

   * OTHER LOCATIONS IN THE WARNING INCLUDE GLENWOOD...ANNABELLA...
     AURORA...SIGURD AND SALINA

WEATHER SPOTTERS IN RICHFIELD REPORT A THUNDERSTORM WITH VERY STRONG 
WINDS CAUSING STRUCTURE AND TREE DAMAGE IN THE AREA. 

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 3874 11223 3862 11207 3886 11172 ,3902 11192

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, 11:14 AM MDTSevere Thunderstorm WarningSLCGarfield21 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.