Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 83, NWS Salt Lake City, UT

August 17, 1997Tooele County, Utah County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 17, 1997, 5:43 PM MDT for Tooele County, Utah County, Utah. It was in force for 42 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
Aug 17, 1997, 5:43 PM MDT (23:43 UTC)
Expired
Aug 17, 1997, 6:25 PM MDT
In force
42 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Tooele County, UT, Utah County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 11.7 hours before the alert went out and 69 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 1997-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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 1997-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.193958Sfc1 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
12 J/kg
Mixed-layer CIN
-401 J/kg
Mixed-layer LCL
2609 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
78 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 172349 RRA
SVRSLC
UTC045-049-180025-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
543 PM MDT SUN AUG 17 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 625 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN NORTHWESTERN UTAH

   ...SOUTHEASTERN TOOELE COUNTY
   ...WESTERN UTAH COUNTY
 
A SEVERE THUNDERSTORM NEAR DUGWAY AND ANOTHER NEAR LOFGREEN ARE
MOVING TO THE NORTHEAST AT 15 MPH.  THESE STORMS WILL AFFECT THE
RURAL AREAS OF SOUTHEASTERN TOOELE AND WESTERN UTAH COUNTIES.
DOPPLER RADAR INDICATES PRECIPITATION AMOUNTS OF UP TO 1.5 INCHES
POSSIBLE IN AN HOUR...ALONG WITH STRONG GUSTY SURFACE WINDS TO 60
MPH.  HAIL...UP TO AN INCH IN DIAMETER...AND FREQUENT LIGHTNING ARE
LIKELY WITH THESE STORMS

PERSONS IN THE VICINITY OF THESE STORMS SHOULD SEEK SHELTER.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 2:15 PM MDTSevere Thunderstorm WarningSLCSalt Lake45 min
Aug 17, 3:08 PM MDTSevere Thunderstorm WarningSLCUtah, Wasatch42 min
Aug 17, 3:08 PM MDTSevere Thunderstorm WarningSLCSummit42 min
Aug 17, 3:26 PM MDTFlash Flood WarningSLCUtah, Wasatch44 min
Aug 17, 3:49 PM MDTSevere Thunderstorm WarningSLCTooele41 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.