Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 95, NWS Salt Lake City, UT

September 4, 1997Kane County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 4, 1997, 9:07 PM MDT for Kane County, Utah. It was in force for 48 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, 9:07 PM MDT (03:07 UTC)
Expired
Sep 4, 1997, 9:55 PM MDT
In force
48 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Kane County, UT

The nearest sounding before it

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 3.1 hours before the alert went out and 229 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, Flgstf/Belemont, AZ at 00:00Z on 1997-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 joules per kilogram.LCLEL10008507005003002001001 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, Flgstf/Belemont, AZ at 00:00Z on 1997-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
83 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
2306 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
32 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 050311 RRA
SVRSLC
UTC025-050355-

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 955 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL UTAH

   ...SOUTHWEST KANE COUNTY

AT 904 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 9 MILES EAST OF KANAB MOVING NORTH AT 20 MPH.

THIS STORM WILL BEGIN TO TRACK NORTH THROUGH THE JOHNSON
CANYON AREA BY 915 PM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 57 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 8:15 PM MDTSevere Thunderstorm WarningSLCTooele45 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.