Alert archive / Utah / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 46, NWS Salt Lake City, UT

July 19, 1998Salt Lake County, Tooele County, Utah County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 19, 1998, 7:59 PM MDT for Salt Lake County, Tooele County, Utah County, Utah. It was in force for 61 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 19, 1998, 7:59 PM MDT (01:59 UTC)
Expired
Jul 19, 1998, 9:00 PM MDT
In force
61 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Salt Lake County, UT, Tooele County, UT, Utah County, UT

The radar

The Salt Lake City radar (KMTX), 93 km from the middle of the area, began a volume at 02:02 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.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 2.0 hours before the alert went out and 39 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 00:00Z on 1998-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 55 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 1998-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.1939Sfc1 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
55 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
4293 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
29 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 200205
SVRSLC
UTC011-035-045-049-200300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
759 PM MDT SUN JUL 19 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * SEVERE THUNDERSTORM WARNING FOR...
     EASTERN TOOELE COUNTY IN UTAH
     UTAH COUNTY IN UTAH
     SALT LAKE COUNTY IN UTAH
     INCLUDING TOOELE AND PROVO AND SALT LAKE CITY

   * UNTIL 900 PM MDT

   * AT 751 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
     SEVERE THUNDERSTORM CENTERED 20 MILES WEST OF PROVO...OR ABOUT  
     20 MILES SOUTHEAST OF TOOELE...MOVING SLOWLY EAST.

STRONG AND DAMAGING WINDS TO 60 MPH ARE LIKELY FROM THIS STORM...BUT2 
THERE WILL BE LITTLE RAIN.  BLOWING DUST IS ALSO LIKELY MAKING 
DRIVING DIFFICULT OR HAZARDOUS.  



LAT...LON 4088 11254 3995 11211 3991 11156 4073 11177

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 6:48 PM MDTSevere Thunderstorm WarningSLCBox Elder, Tooele57 min
Jul 19, 7:59 PM MDTSevere Thunderstorm WarningSLCDavis61 min
Jul 20, 5:59 PM MDTSevere Thunderstorm WarningSLCKane41 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; radar from the NEXRAD Level II archive.