Alert archive / Utah / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 5, NWS Salt Lake City, UT

July 24, 1990Utah County, Wasatch County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 24, 1990, 2:07 AM MDT for Utah County, Wasatch County, Utah. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jul 24, 1990, 2:07 AM MDT (08:07 UTC)
Expired
Jul 24, 1990, 4:15 AM MDT
In force
2 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Utah County, UT, Wasatch County, UT

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 8.1 hours before the alert went out and 74 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 1990-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 1990-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
40 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
3337 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
21 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 240810
SVRSLC
UTC049-051-241015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
207 AM MDT TUE JUL 24 1990
 
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS IN CENTRAL UTAH
 
   ...UTAH COUNTY...WASATCH COUNTY
 
A SPOTTER IN PAYSON REPORTED A SEVERE THUNDERSTORM SHORTLY AFTER 2
A.M. LARGE HAIL AND HEAVY RAIN WERE OCCURRING WITH THIS STORM. THE
STORM IS MOVING TOWARD THE NORTHEAST.  IT WILL MOVE THROUGH THE
REMAINDER OF UTAH COUNTY AND INTO WASATCH COUNTY DURING THE NEXT TWO
HOURS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS JTHE ROAD.
 
DMC/DJS...0811Z.

Nearby

Severe Thunderstorm Warnings in Utah, 1990Every severe thunderstorm warning in 1990

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.