Alert archive / Utah / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 6, NWS Salt Lake City, UT

July 24, 1990Carbon County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 24, 1990, 7:56 PM MDT for Carbon County, Utah. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
Jul 24, 1990, 7:56 PM MDT (01:56 UTC)
Expired
Jul 24, 1990, 9:00 PM MDT
In force
64 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Carbon 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, 1.9 hours before the alert went out and 168 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 1990-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 166 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 1990-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 191 square meters per square second.193958Sfc1 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
166 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
2194 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
191 m²/s²
0-3 km storm-relative helicity
295 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 250159
SVRSLC
UTC007-250300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
756 PM MDT TUE JUL 24 1990
 
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN EAST CENTRAL UTAH
 
   ...CARBON COUNTY
 
THE PRICE HIGHWAY PATROL AT 751 PM THIS EVENING REPORTED THREE-QUARTER
INCH DIAMETER HAIL WAS FALLING AT WELLINGTON. THE ASSOCIATED
THUNDERSTORM IS MOVING NORTHEAST AT ABOUT 25 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
ERC 25 JUL 90 0158Z

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 24, 5:45 PM MDT, 2 hours 11 minutes before
UTZALL-250500-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
545 PM MDT TUE JUL 24 1990

...STRONG THUNDERSTORMS ARE CONTINUING OVER MUCH OF NORTH CENTRAL AND
NORTHEAST UTAH...

THIS WAS CONFIRMED AT 530 PM BY SATELLITE...RADAR...AND LIGHTNING
DETECTION INFORMATION AS WELL AS NUMEROUS REPORTS OF SIGNIFICANT WEATHER.

IN THE LAST HOUR THIS INCLUDED 5/8 INCH DIAMETER HAIL IN EMERY COUNTY...
WINDS TO 47 MPH AT CEDAR CITY...67 CLOUD TO GROUND LIGHTNING STRIKES IN
30 MINUTES JUST WEST OF THE SALT LAKE AIRPORT...AND LOCALLY HEAVY
RAINFALL AT SEVERAL LOCATIONS IN NORTH CENTRAL UTAH.

THESE TYPE CONDITIONS ARE EXPECTED TO CONTINUE OVER MOST OF NORTH CENTRAL
NORTHEAST UTAH THROUGH THIS EVENING...BEFORE ABATING SOME.

PERSONS PARTICIPATING IN OUTDOOR ACTIVITIES SHOULD BE ALERT
TO THREATENIG CONDITIONS AND DANGEROUS LIGHTNING.  DON`T BE A
HUMAN LIGHTNING ROD.  TAKE PROPER PROTECTION IN A STRUCTURE OR
VEHICLE IF LIGHTNINcG IS IN THE AREA.

FURTHER STATEMENTS WILL BE ISSUED AS NEEDED.

ERC 24 JUL 90 2342Z

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.