Alert archive / Utah / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 10, NWS Salt Lake City, UT

May 30, 1995Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 30, 1995, 1:42 PM MDT for Box Elder County, Utah. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
May 30, 1995, 1:42 PM MDT (19:42 UTC)
Expired
May 30, 1995, 2:45 PM MDT
In force
63 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, 7.7 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 1995-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 1995-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1661 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
153 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 301944
SVRSLC
UTC003-302045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
142 PM MDT TUE MAY 30 1995

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWEST UTAH

   ...WESTERN BOX ELDER COUNTY

AT 138 PM DOPPLER WEATHER RADAR SHOWED SEVERAL STRONG THUNDERSTORMS
IN WESTERN BOX ELDER COUNTY.  THE STRONGEST WAS ABOUT 5 MILES SOUTH
OF PARK VALLEY.  IT IS LIKELY TO PRODUCT STRONG GUSTY WINDS...HEAVY
RAIN...AND HAIL.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...DESTRUCTIVE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN.  STAY INSIDE AWAY FROM
WINDOWS UNTIL THE STORM HAS PASSED.

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 30, 12:29 PM MDT, 1 hour 13 minutes before
UTZALL-302300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1230 PM MDT MON MAY 29 1995

...THUNDERSTORMS INCREASING OVER NORTHERN UTAH...

A WEAK UPPER LEVEL DISTURBANCE OVER SOUTHERN IDAHO WAS CAUSING
THUNDERSTORMS TO INCREASE RAPIDLY OVER NORTHERN UTAH EARLY THIS
AFTERNOON.  AT 1220 PM THE MOST ACTIVE THUNDERSTORM AREAS WERE OVER
THE WESTERN DESERTS AND THE NORTHERN MOUNTAINS.

ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER MOST OF THE
STATE THROUGH THE AFTERNOON AND EARLY EVENING HOURS.  THE NORTHERN
HALF OF THE STATE IS EXPECTED TO REMAIN THE MOST ACTIVE.

LIGHTNING WILL BE THE GREATEST HAZARD FROM MOST OF THE THUNDERSTORMS
TODAY.  HOWEVER...A FEW OF THE THUNDERSTORMS IN THE NORTH WILL BE
STRONG ENOUGH TO PRODUCE STRONG GUSTY WINDS...LOCALLY HEAVY
RAINFALL...AND SMALL HAIL.

AT 1220 PM TWO STRONG THUNDERSTORMS WERE IN EXTREME SOUTHERN IDAHO
ABOUT TO MOVE INTO BOX ELDER COUNTY.  ONE OF THESE WAS OVER
INTERSTATE 84 AND THE OTHER WAS NEAR THE NEVADA BORDER.

THE GENERAL MOVEMENT OF THE THUNDERSTORMS TODAY WILL BE TOWARD THE
SOUTH AT 10-15 MPH.

IF YOU ARE CAUGHT OUTSIDE IN A THUNDERSTORM...DO NOT STAND UNDERNEATH
A TALL ISOLATED TREE OR NEAR A TELEPHONE POLE.  THESE OBJECTS ARE
MOST LIKELY TO BE STRUCK BY LIGHTNING.  SEEK SHELTER IN A BUILDING OR
VEHICLE WHEN THUNDERSTORMS APPROACH.

DRS 1827Z

Nearby

Severe Thunderstorm Warnings in Utah, 1995Every severe thunderstorm warning in 1995

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.