Alert archive / Utah / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 4, NWS Salt Lake City, UT

May 27, 1994Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 27, 1994, 6:08 PM MDT for Tooele County, Utah. It was in force for 52 min.

The area

The counties it named.

The facts

Issued
May 27, 1994, 6:08 PM MDT (00:08 UTC)
Expired
May 27, 1994, 7:00 PM MDT
In force
52 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Tooele County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.1 hours before the alert went out and 110 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 1994-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 1994-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
12 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
2409 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSLC 280013 COR
SVRSLC
UTC011-035-057-045-280115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
608 PM MDT FRI MAY 27 1994

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  715 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTH CENTRAL UTAH

   ...DAVIS COUNTY...NORTHERN SALT LAKE COUNTY
   ...WESTERN WEBER COUNTY

IN NORTHWEST UTAH

   ...NORTHEASTERN TOOELE COUNTY
THE UTAH HIGHWAY PATROL HAS RECEIVED REPORTS OF 70-80 MPH WINDS WITH
NEAR ZERO VISIBILITY AT THE TOOELE EXIT OF INTERSTATE 80, ABOUT 15
MILES WEST OF SALT LAKE CITY.  SMALL HAIL AND HEAVY RAIN HAVE ALSO
BEEN REPORTED IN THE NORTH OGDEN AREA.

THE THUNDERSTORM PRODUCING THIS WIND IS MOVING NORTHEAST AT 30 MPH.

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.

...CORRECTION TO REMOVE WORDS  FOR HIGH WINDS  EARLY IN TEXT...

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 27, 2:49 PM MDT, 3 hours 19 minutes before
UTZ001>003-010-270100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
245 PM MDT FRI MAY 27 1994

...SEVERE THUNDERSTORM WATCH EXTREME NORTHERN UTAH UNTIL 700 PM...

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE EXTREME NORTHERN
PORTION OF UTAH UNTIL 700 MDT THIS EVENING.  THIS WATCH EXTENDS NORTH
OF A LINE THAT RUNS EAST TO WEST THROUGH BRIGHAM CITY.  COUNTIES IN
THE WATCH AREA INCLUDE: NORTHERN BOX ELDER, CACHE, AND RICH.  LARGER
CITIES INCLUDE: LOGAN, TREMONTON AND BRIGHAM CITY.  THIS WATCH
INCLUDE BEAR LAKE STATE PARK.

STRONG THUNDERSTORMS HAVE DEVELOPED ACROSS MUCH OF NORTHEAST NEVADA
AND SOUTHERN IDAHO THIS AFTERNOON.  THESE STORMS WILL DRIFT INTO
EXTREME NORTHERN UTAH OVER THE NEXT SEVERAL HOURS.  STRONG GUSTY
WINDS IN EXCESS OF 60 MPH, SMALL HAIL AND FREQUENT CLOUD-TO-GROUND
LIGHTNING ARE POSSIBLE WITH ANY THUNDERSTORM.

REMEMBER, IF THUNDERSTORMS APPROACH YOUR AREA SEEK SHELTER IN A
VEHICLE OR SOLID BUILDING.  IF CAUGHT OUTDOORS, STAY AWAY FROM TALL
SOLITARY OBJECTS THAT CAN ATTRACT LIGHTNING.  FIND A LOW SPOT TO HIDE
IN TO AVOID FLYING DEBRIS AND LIGHTNING.

MCC...2045Z
Special weather statement, May 27, 5:08 PM MDT, 1 hour before
UTZ001>003-010-270100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
510 PM MDT FRI MAY 27 1994

...SEVERE THUNDERSTORM WATCH CONTINUING EXTREME NORTHERN UTAH UNTIL
   700 PM...
...STRONG THUNDERSTORMS MOVING TOWARD NORTH-CENTRAL BOX ELDER
   COUNTY...

THE SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE EXTREME
NORTHERN PORTION OF UTAH UNTIL 700 MDT THIS EVENING.  THIS WATCH
EXTENDS NORTH OF A LINE THAT RUNS EAST TO WEST THROUGH BRIGHAM CITY.
COUNTIES IN THE WATCH AREA INCLUDE: NORTHERN BOX ELDER, CACHE, AND
RICH.  LARGER CITIES INCLUDE: LOGAN, TREMONTON AND BRIGHAM CITY.
THIS WATCH INCLUDE BEAR LAKE STATE PARK.

AT 500 PM RADAR AND SATELLITE OBSERVATIONS INDICATED TWO STRONG
THUNDERSTORM AREAS, ONE ABOUT 20 MILES EAST OF LUCIN AND THE OTHER
ABOUT 20 MILES EAST OF WENDOVER.  THESE THUNDERSTORMS WERE MOVING
TOWARD THE NORTHEAST AT ABOUT 30 MPH.

THESE STORMS SHOULD MOVE ACROSS NORTHERN BOX ELDER COUNTY IN THE AREA
BETWEEN PARK VALLEY ON THE WEST AND TREMONTON ON THE EAST IN THE
BETWEEN NOW AND ABOUT 630 PM.

THESE STORMS DEVELOPED RAPIDLY AND ADDITIONAL STORMS MAY ALSO DEVELOP
QUICKLY IN OR NEAR THE WATCH AREA.

EVERYONE IN EXTREME NORTHERN UTAH SHOULD BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS THROUGH THE EARLY EVENING HOURS.  STRONG
GUSTY WINDS OVER 50 MPH AND LARGE HAIL HAVE ALREADY BEEN REPORTED
FROM SOME OF THE THUNDERSTORMS ASSOCIATED WITH THIS WEATHER SYSTEM.

REMEMBER...SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...DESTRUCTIVE
HAIL... DEADLY LIGHTNING...AND VERY HEAVY RAIN.  TAKE COVER WHEN
THUNDERSTORMS APPROACH YOUR AREA.  STAY INSIDE AWAY FROM WINDOWS
UNTIL THE STORM HAS PASSED.

DRS...2308Z
Special weather statement, May 27, 6:05 PM MDT, 3 minutes before
UTZ001>003-010-270100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
604 PM MDT FRI MAY 27 1994

...SEVERE THUNDERSTORM WATCH CONTINUING EXTREME NORTHERN UTAH UNTIL
   700 PM...
...STRONG THUNDERSTORMS NEAR THE GREAT SALT LAKE...

THE SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE EXTREME
NORTHERN PORTION OF UTAH UNTIL 700 MDT THIS EVENING.  THIS WATCH
EXTENDS NORTH OF A LINE THAT RUNS EAST TO WEST THROUGH BRIGHAM CITY.
COUNTIES IN THE WATCH AREA INCLUDE: NORTHERN BOX ELDER, CACHE, AND
RICH.  LARGER CITIES INCLUDE: LOGAN, TREMONTON AND BRIGHAM CITY.
THIS WATCH INCLUDE BEAR LAKE STATE PARK.

AT 550 PM RADAR AND SATELLITE OBSERVATIONS INDICATED A LINE OF
THUNDERSTORMS, SOME OF THEM STRONG, EXTENDING FROM NEAR MALAD, IDAHO
TO A POINT ABOUT 30 MILES WEST OF SALT LAKE CITY THEN TO DUGWAY.

WINDS GUSTING OVER 55 MPH HAVE BEEN REPORTED WITH THESE THUNDERSTORMS
AT LAKESIDE...35 MILES WEST OF PROMONTORY POINT AND JUST NORTH OF
GRANTSVILLE...10 MILES WEST NORTHWEST OF TOOELE.

THESE THUNDERSTORMS CONTINUE TO MOVE TOWARD THE NORTHEAST AT ABOUT 30
MPH.  THE LEADING EDGE OF THE THUNDERSTORMS WILL MOVE ACROSS THE
NORTHERN PORTION OF THE WASATCH FRONT, FROM ABOUT HILL AIR FORCE BASE
NORTHWARD BY 630 PM.  POINTS FARTHER SOUTH FROM HILL FIELD TO
SOUTHERN SALT LAKE COUNTY WILL LIKELY SEE THE FIRST EFFECTS OF THESE
STORMS BETWEEN 630 AND 730 THIS EVENING.

MOVE INSIDE A STRONG BUILDING WHEN THUNDERSTORMS ARE OCCURRING.  DO
NOT STAND BY WINDOWS.  AVOID THE USE OF TELEPHONES AND ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED.

DRS...0003Z

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 6:08 PM MDTSevere Thunderstorm WarningSLCDavis, Salt Lake, Weber67 min
May 27, 6:40 PM MDTSevere Thunderstorm WarningSLCSalt Lake50 min
May 27, 7:14 PM MDTSevere Thunderstorm WarningSLCRich46 min
May 27, 8:24 PM MDTSevere Thunderstorm WarningSLCUtah36 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.