Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 85, NWS Salt Lake City, UT

August 20, 1997Davis County, Morgan County, Salt Lake County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 20, 1997, 7:12 PM MDT for Davis County, Morgan County, Salt Lake 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
Aug 20, 1997, 7:12 PM MDT (01:12 UTC)
Expired
Aug 20, 1997, 8:00 PM MDT
In force
48 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Davis County, UT, Morgan County, UT, Salt Lake County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 1.2 hours before the alert went out and 15 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 00:00Z on 1997-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 00:00Z on 1997-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
13 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
3378 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
82 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 210117 COR
SVRSLC
UTC011-029-035-210200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
712 PM MDT WED AUG 20 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

...IN NORTHWEST UTAH

   ...DAVIS COUNTY
   ...WESTERN MORGAN COUNTY
   ...NORTHERN SALT LAKE COUNTY...

AT 712 PM MDT...A SEVERE THUNDERSTORM WITH HIGH WINDS WAS MOVING
THROUGH NORTHERN SALT LAKE AND DAVIS COUNTIES.  MOVEMENT OF THE
STORM WAS EAST NORTHEAST AT 25 MPH.

SALT LAKE CITY...BOUNTIFUL...NORTH SALT LAKE AND CENTERVILLE WILL
RECEIVE WINDS IN EXCESS OF 65 MPH FROM THIS STORM.

SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING...BUT STAY AWAY
FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 6:30 PM MDTSevere Thunderstorm WarningSLCSalt Lake, Tooele30 min
Aug 21, 5:15 PM MDTFlash Flood WarningSLCWayne90 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.