Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 12, NWS Salt Lake City, UT

May 31, 1997Box Elder County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 31, 1997, 4:55 PM MDT for Box Elder County, Utah. It was in force for 60 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
May 31, 1997, 4:55 PM MDT (22:55 UTC)
Expired
May 31, 1997, 5:55 PM MDT
In force
60 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Box Elder County, UT

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 10.9 hours before the alert went out and 118 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 12:00Z on 1997-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Elko, NV at 12:00Z on 1997-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2344 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
106 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.

040 
WUUS1 KSLC 312306 RRA
SVRSLC
UTC003-312355-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
455 PM MDT SAT MAY 31 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 555 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...WESTERN AND NORTHERN BOX ELDER COUNTY

DOPPLER RADAR SHOWS A LINE OF SEVERE THUNDERSTORMS ACROSS WESTERN
AND NORTHERN BOX ELDER COUNTY....EXTENDING FROM NORTH OF WENDOVER
TO THE NORTHERN TIP OF THE GREAT SALT LAKE.  THIS LINE CONTAINS
SEVERAL STORMS WHICH HAVE THE POTENTIAL TO PRODUCE 1 INCH HAIL
ALONG WITH WINDS GREATER THAN 60 MPH.  STORMS ARE MOVING TO THE
NORTHEAST AT 30 MPH.

THIS LINE MAY BEGIN TO MOVE TO THE EAST LATER THIS AFTERNOON AND
EVENING...THUS PEOPLE IN CACHE COUNTY SHOULD STAY
ALERT FOR UPDATES TO THESE STORMS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 3:32 PM MDTSevere Thunderstorm WarningSLCBox Elder28 min
May 31, 4:00 PM MDTSevere Thunderstorm WarningSLCBox Elder45 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.