Alert archive / Utah / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 2, NWS Salt Lake City, UT

April 23, 1994Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Apr 23, 1994, 5:00 PM MDT for Box Elder County, Utah. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Apr 23, 1994, 5:00 PM MDT (23:00 UTC)
Expired
Apr 23, 1994, 6:00 PM MDT
In force
60 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Box Elder County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 11.0 hours before the alert went out and 129 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 1994-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 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 1994-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.19395878Sfc1 km3 km6 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
1643 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
143 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 232305 RRA
SVRSLC
UTC003-240000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
500 PM MDT SAT APR 23 1994

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS 
EFFECTIVE UNTIL 600 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWEST UTAH

   ...WESTERN BOX ELDER COUNTY

THE SEVERE THUNDERSTORM WARNING FOR HIGH WINDS IS EXTENDED FOR
ANOTHER HOUR IN WESTERN BOX ELDER COUNTY.  THE THUNDERSTORMS THAT
PRODUCED GUSTS TO 68 MPH AT WENDOVER ARE MOVING NORTHEAST AT 20 MPH
AND WILL BE MOVING THROUGH WESTERN BOX ELDER COUNTY DURING THE NEXT
HOUR.  THIS WILL AFFECT THOSE IN THE CITY OF PARK VALLEY AND
SURROUNDING AREAS.

THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 5:00 PM MDTSevere Thunderstorm WarningSLCCache, Rich60 min

Nearby

Severe Thunderstorm Warnings in Utah, 1994Every severe thunderstorm warning in 1994

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.