Alert archive / Utah / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 10, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 25, 1990, 2:10 PM MDT for Salt Lake County, Utah. It was in force for 60 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 25, 1990, 2:10 PM MDT (20:10 UTC)
- Expired
- Sep 25, 1990, 3:10 PM MDT
- In force
- 60 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Salt Lake County, UT
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 25, 2:10 PM MDT | Hail 1 | Salt Lake, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.2 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.
- Mixed-layer CAPE
- 94 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1691 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSLC 252011 SVRSLC UTC035-251515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 210 PM MDT TUE SEP 25 1990 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 310 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN NORTH CENTRAL UTAH ...SALT LAKE COUNTY A SEVERE THUNDERSTORMS WAS REPORTED TO BE OCCURRING IN WEST VALLEY CITY SHORTLY AFTER 2 P.M. LARGE HAIL OF 3/4 INCH AND LARGER SIZE WAS REPORTED. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOsWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. DMC...2010Z
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 25, 4:05 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake | 55 min |
| Sep 25, 5:05 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake | 55 min |
| Sep 25, 5:25 PM MDT | Severe Thunderstorm Warning | SLC | Summit | 65 min |
Nearby
Severe Thunderstorm Warnings in Utah, 1990Every severe thunderstorm warning in 1990
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.