Alert archive / Utah / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 101, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 6, 1997, 10:19 PM MDT for Box Elder County, Cache County, Utah. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 6, 1997, 10:19 PM MDT (04:19 UTC)
- Expired
- Sep 6, 1997, 11:20 PM MDT
- In force
- 61 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
Counties Box Elder County, UT, Cache County, UT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 6, 10:40 PM MDT | Hail 1 | Paradise, UT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 00:00Z, 4.3 hours before the alert went out and 103 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.
- Mixed-layer CAPE
- 755 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 2480 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSLC 070421 RRA SVRSLC UTC003-005-070520- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1019 PM MDT SAT SEP 6 1997 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT IS CONTINUING THE SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1120 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWESTERN UTAH ...EASTERN BOX ELDER COUNTY ...SOUTHERN CACHE COUNTY AT 1013 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 7 MILES NORTHWEST OF BRIGHAM CITY MOVING EAST AT 25 MPH. THIS STORM CAN BE EXPECTED IN THE VICINITY OF... BRIGHAM CITY AT AROUND 1025 PM MDT WELLSVILLE AT AROUND 1025 PM MDT MANTUA AT AROUND 1035 PM MDT THIS IS A LARGE THUNDERSTORM. IT WILL AFFECT A BROAD AREA FROM HONEYVILLE TO BRIGHAM CITY AND EASTWARD FOR THE NEXT 45 MINUTES TO AN HOUR. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 60 MPH...LARGE HAIL...AND DEADLY LIGHTNING. 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 7:15 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 60 min |
| Sep 6, 8:50 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 55 min |
| Sep 6, 9:22 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 58 min |
| Sep 6, 9:58 PM MDT | Flash Flood Warning | SLC | Kane | 2 hr |
| Sep 7, 2:54 AM MDT | Severe Thunderstorm Warning | SLC | Utah | 41 min |
| Sep 7, 5:58 AM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Weber | 47 min |
| Sep 7, 7:05 AM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan | 30 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.