Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 94, NWS Salt Lake City, UT

September 4, 1997Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 4, 1997, 8:15 PM MDT for Tooele County, Utah. It was in force for 45 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 4, 1997, 8:15 PM MDT (02:15 UTC)
Expired
Sep 4, 1997, 9:00 PM MDT
In force
45 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Tooele County, UT

The nearest sounding before it

Elko, NV (KLKN), launched 00:00Z, 2.3 hours before the alert went out and 102 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 1997-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 102 joules per kilogram.LCLEL10008507005003002001001 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, Elko, NV at 00:00Z on 1997-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
102 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
2907 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
66 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.

889 
WUUS1 KSLC 060217
SVRSLC
UTC045-050300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
815 PM MDT THU SEP 4 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 900 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...NORTHEASTERN TOOELE COUNTY
 
AT 812 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 40 MILES NORTHWEST OF TOOELE OR 4 MILES WEST OF LOW MOVING
EAST AT 25 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
LOW AT AROUND 820 PM MDT

STRONG GUSTY WINDS MAY ALSO IMPACT TRAVELLERS ON I-80 DURING THE
PERIOD OF THE WARNING.
 
THIS THUNDERSTORM MAY PRODUCE STRONG GUSTY WIND...LARGE HAIL...AND
FREQUENT LIGHTNING.  TAKE COVER WHEN THREATENING WEATHER APPROACHES.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 9:07 PM MDTSevere Thunderstorm WarningSLCKane48 min
Sep 5, 3:44 PM MDTSevere Thunderstorm WarningSLCGarfield, Piute46 min
Sep 5, 5:43 PM MDTFlash Flood WarningSLCGarfield2 hr

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.