Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 3, NWS Salt Lake City, UT

May 15, 1997Box Elder County, Cache County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 15, 1997, 3:17 PM MDT for Box Elder County, Cache County, Utah. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 15, 1997, 3:17 PM MDT (21:17 UTC)
Expired
May 15, 1997, 3:45 PM MDT
In force
28 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Box Elder County, UT, Cache County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.3 hours before the alert went out and 103 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 1997-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1997-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
2734 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
84 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 152125 RRA
SVRSLC
UTC005-003-152145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
317 PM MDT THU MAY 15 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTH CENTRAL UTAH

   ...NORTHWESTERN CACHE COUNTY...EASTERN BOX ELDER COUNTY...

AT 315 PM MDT...DOPPLER RADAR INDICATES STRONG THUNDERSTORMS.  THE
THUNDERSTORMS WERE 10 MILES WEST OF PLYMOUTH...IN BOX ELDER COUNTY
AND WERE MOVING EAST AT 10 MPH.

TOWNS IN THE PATH OF THESE STORMS INCLUDE COLLINSTON AND SMITHFIELD. 

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS^ OF 57 MPH...
DESTRUCTIVE HAIL AND DEADLY LIGHTNING.  FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.  

YOUNG...2124Z

Nearby

Severe Thunderstorm Warnings in Utah, 1997Every severe thunderstorm warning in 1997

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.