Alert archive / Utah / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 13, NWS Salt Lake City, UT

May 31, 1994Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 31, 1994, 1:01 PM MDT for Salt Lake County, Utah. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: May 31, 1994, 1:01 PM MDT (19:01 UTC)
Expired: May 31, 1994, 2:00 PM MDT
In force: 59 min
Issued by: NWS Salt Lake City, UT
Area: Whole counties

County Salt Lake County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 7.0 hours before the alert went out and 13 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3559 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 55 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 
WUUS1 KSLC 311903 RRA
SVRSLC
UTC035-312000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
101 PM MDT TUE MAY 31 1994

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  200 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL UTAH

   ...SALT LAKE COUNTY

THE LINE OF SEVERE THUNDERSTORMS IS ABOUT TO MOVE INTO SOUTHWEST SALT
LAKE COUNTY.  TREES HAVE BEEN UPROOTED ON THE BYU CAMPUS IN PROVO
ALONG WITH SOME REPORTS OF DAMAGE TO ROOFS AND BUILDINGS IN SOUTHWEST
UTAH COUNTY.  MARBLE SIZE HAIL HAS BEEN REPORTED IN EASTERN TOOELE
AND MUCH OF UTAH COUNTY. 

LOCALLY HEAVY RAIN IS ALSO FALLING WITH THESE THUNDERSTORMS AND WILL
CAUSE SOME MINOR URBAN FLOODING OF STREETS AND INTERSECTIONS. 

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.


&

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, May 31, 10:26 AM MDT, 2 hours 35 minutes before

UTZ006-311800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1030 AM MDT TUE MAY 31 1994

    ...STRONG THUNDERSTORMS IN WEST CENTRAL UTAH...

AN AREA OF STRONG THUNDERSTORMS WAS DEVELOPING RAPIDLY OVER WEST
CENTRAL THIS MORNING.  AT 1000 AM THE LEADING EDGE OF THIS AREA
EXTENDED FROM EXTREME SOUTHWEST TOOELE COUNTY NEAR IBAPAH TO
NORTHWEST IRON COUNTY NEAR LUND.

THIS AREA OF THUNDERSTORMS IS MOVING TOWARD THE NORTHEAST AT 25 MPH.
THIS WILL BRING IT ACROSS THE DELTA TO MILFORD AREA BETWEEN NOW AND
ABOUT 1115 AM.

WINDS GUSTING TO 50 MPH AND HAIL UP TO ONE-HALF INCH DIAMETER HAVE
ALREADY BEEN REPORTED ALONG HIGHWAY 50 AND 6 JUST EAST OF THE UTAH-
NEVADA BORDER.

WIND GUSTS OVER 50 MPH, HAIL, HEAVY RAIN, AND FREQUENT LIGHTNING ARE
ALL POSSIBLE WITH THESE THUNDERSTORMS.   RESIDENTS AND MOTORISTS IN
THE WEST CENTRAL UTAH DESERTS NEED TO BE PREPARED FOR STRONG
THUNDERSTORM ACTIVITY OVER THE NEXT HOUR.  DO NOT REMAIN OUTDOORS.
SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING ...BUT STAY AWAY
FROM WINDOWS.

DRS...1027Z

Special weather statement, May 31, 10:41 AM MDT, 2 hours 20 minutes before

UTZ001>005-007>013-311800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1040 AM MDT TUE MAY 31 1994

    ...STRONG THUNDERSTORMS LIKELY ACROSS UTAH TODAY...

A WEATHER SYSTEM MOVING ACROSS UTAH TODAY WILL PRODUCE NUMEROUS
SHOWERS AND THUNDERSTORMS THROUGH THIS EVENING.  THE FIRST BAND HAS
ALREADY MOVED THROUGH MUCH OF WESTERN UTAH WITH SHOWERS AND GUSTY
WINDS.

HOWEVER,  AN AREA OF MUCH STRONGER THUNDERSTORMS IS DEVELOPING IN
WEST CENTRAL UTAH AND WILL MOVE ACROSS THE STATE TODAY.  MARBLE SIZE
HAIL AND WINDS GUSTING TO 50 MPH HAVE ALREADY BEEN REPORTED BY
TRUCKERS ALONG HIGHWAY 50 AND 6 JUST EAST OF THE UTAH-NEVADA BORDER.

THESE THUNDERSTORMS ARE LIKELY TO BECOME STRONGER AS THE DAY PROGRESS
AND A FEW MAY BECOME SEVERE.  THIS MEANS WIND GUSTS OVER 58 MPH AND
HAIL 3/4 INCH OR LARGER IS POSSIBLE ALONG WITH HEAVY RAIN AND
FREQUENT LIGHTING.

THE MOST LIKELY AREA FOR THE STRONG STORMS APPEARS TO BE OVER THE
NORTHERN AND CENTRAL PORTIONS OF THE STATE.  THE EXTREME SOUTH HAS
LESS RISK BUT WILL STILL SEE SOME THUNDERSTORM ACTIVITY.  THE GENERAL
MOVEMENT OF THE THUNDERSTORMS WILL BE TOWARD THE NORTHEAST AT ABOUT
25 MPH.

EVERYONE IN UTAH TODAY NEEDS TO BE AWARE OF WEATHER CONDITIONS.
WATCH FOR THUNDERSTORMS APPROACHING FROM THE SOUTHWEST AND SEEK
SHELTER BEFORE THE THUNDERSTORMS ARRIVE.  BE PREPARED FOR IMMEDIATE
ACTION IF WARNINGS ARE ISSUED FOR YOUR AREA.  IF LARGE HAIL IS
REPORTED TRY MO6VE VEHICLES INTO A GARAGE OR CARPORT TO PREVENT
DAMAGE.

DRS...1040Z

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 11:38 AM MDT	Severe Thunderstorm Warning	SLC	Millard	57 min
May 31, 11:38 AM MDT	Severe Thunderstorm Warning	SLC	Juab, Tooele	67 min
May 31, 12:24 PM MDT	Severe Thunderstorm Warning	SLC	Sanpete, Sevier	66 min
May 31, 12:24 PM MDT	Severe Thunderstorm Warning	SLC	Utah	66 min
May 31, 1:27 PM MDT	Severe Thunderstorm Warning	SLC	Davis, Morgan, Summit	63 min
May 31, 1:27 PM MDT	Severe Thunderstorm Warning	SLC	Wasatch	63 min
May 31, 2:24 PM MDT	Severe Thunderstorm Warning	SLC	Carbon	66 min
May 31, 2:38 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Cache	67 min
May 31, 2:38 PM MDT	Severe Thunderstorm Warning	SLC	Rich	67 min
May 31, 3:52 PM MDT	Severe Thunderstorm Warning	SLC	Daggett, Uintah	68 min

Nearby

Severe Thunderstorm Warnings in Utah, 1994 Every 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.