Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 97, NWS Salt Lake City, UT

September 5, 1997Box Elder County, Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 5, 1997, 11:09 PM MDT for Box Elder County, Tooele County, Utah. It was in force for 56 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
Sep 5, 1997, 11:09 PM MDT (05:09 UTC)
Expired
Sep 6, 1997, 12:05 AM MDT
In force
56 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Box Elder County, UT, Tooele County, UT

The nearest sounding before it

Elko, NV (KLKN), launched 00:00Z, 5.2 hours before the alert went out and 93 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, Elko, NV at 00:00Z on 1997-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 933 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Elko, NV at 00:00Z on 1997-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 square meters per square second.19395878Sfc1 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
933 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1811 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
-35 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSLC 060510 RRA
SVRSLC
UTC003-045-060605-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1109 PM MDT FRI SEP 5 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1205 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTHWESTERN UTAH

   ...SOUTHEASTERN BOX ELDER COUNTY
   ...NORTHEASTERN TOOELE COUNTY
 
AT 1102 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 39 MILES NORTHWEST OF TOOELE OR 2 MILES WEST OF LOW MOVING
NORTH AT 30 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS HOWEVER I-80 WEST
OF LOW MAY BE EXPERIENCING HEAVY RAINFALL AND PONDING OF WATER
ON THE ROADWAY.  LARGE HAIL AND STRONG GUSTY WINDS ARE LIKELY
WITH THIS STORM.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 2:57 AM MDTFlash Flood WarningSLCWashington2 hr
Sep 6, 2:54 PM MDTSevere Thunderstorm WarningSLCGarfield46 min

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.