Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 88, NWS Salt Lake City, UT

September 2, 1997Utah County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 2, 1997, 4:15 PM MDT for Utah 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
Sep 2, 1997, 4:15 PM MDT (22:15 UTC)
Expired
Sep 2, 1997, 5:15 PM MDT
In force
60 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Utah County, UT

The radar

The Salt Lake City radar (KMTX), 143 km from the middle of the area, began a volume at 22:14 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, 10.3 hours before the alert went out and 76 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 1997-09-02Temperature 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 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 1997-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
2094 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
136 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 022214 RRA
SVRSLC
UTC049-022315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
415 PM MDT TUE SEP 2 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHWESTERN UTAH

   ...SOUTH CENTRAL UTAH COUNTY
 
AT 412 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 23 MILES SOUTH OF PROVO OR 7 MILES SOUTHEAST OF SPRING LAKE
MOVING NORTH AT 25 MPH.

THIS STORM CAN BE EXPECTED IN THE VICINITY OF...
SPRING LAKE            AT AROUND 415 PM MDT
PAYSON                 AT AROUND 425 PM MDT
PROVO                  AT AROUND 455 PM MDT
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
BUILDING.  DO NOT STAND BY WINDOWS.  DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS
PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LO@W WATER CROSSINGS.



BURCH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 6:07 PM MDTFlash Flood WarningSLCGarfield, Kane118 min
Sep 2, 3:50 PM MDTFlash Flood WarningSLCKane90 min
Sep 2, 5:36 PM MDTFlash Flood WarningSLCGarfield, Kane89 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.