Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 79, NWS Salt Lake City, UT

August 17, 1997Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 17, 1997, 2:15 PM MDT for Salt Lake 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
Aug 17, 1997, 2:15 PM MDT (20:15 UTC)
Expired
Aug 17, 1997, 3:00 PM MDT
In force
45 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Salt Lake County, UT

The radar

The Salt Lake City radar (KMTX), 79 km from the middle of the area, began a volume at 20:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.3 hours before the alert went out and 13 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.

982 
WUUS1 KSLC 172020
SVRSLC
UTC035-172100-

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 300 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...SOUTHERN AND EASTERN SALT LAKE COUNTY
 
AT 210 PM MDT...A SEVERE THUNDERSTORM WITH HAIL UP TO ONE INCH WAS
INDICATED BY DOPPLER RADAR OVER SOUTH CENTRAL SALT LAKE COUNTY.
MOVEMENT WAS TO THE NORTHEAST AT ABOUT 10 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
MIDVALE                AT AROUND 220 PM MDT
SANDY CITY             AT AROUND 225 PM60
      OVC100
     FM0900 15008KT P6SM SCT120 BKN200 BECMG 1617 18010KT=

The office that day

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

IssuedProductOfficeCountiesLasted
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
Aug 17, 5:43 PM MDTSevere Thunderstorm WarningSLCTooele, Utah42 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; radar from the NEXRAD Level II archive.