Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 75, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 1991, 10:33 AM CDT for Hennepin County, Minnesota. It was in force for 57 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
- Jun 18, 1991, 10:33 AM CDT (15:33 UTC)
- Expired
- Jun 18, 1991, 11:30 AM CDT
- In force
- 57 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Hennepin County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 18, 10:36 AM CDT | Hail 1.75 | Hennepin, MN |
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
Minneapolis, MN (KSTC), launched 12:00Z, 3.6 hours before the alert went out and 20 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
- 814 J/kg
- Mixed-layer CIN
- -230 J/kg
- Mixed-layer LCL
- 926 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 135 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 KMSP 181533 SVRMSP MNC053-181630- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 1033 AM CDT TUE JUN 18 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL MINNESOTA ...HENNEPIN COUNTY AT 1030 AM...RADAR SHOWED A SEVERE THUNDERSTORM IN EASTERN WRIGHT COUNTY AROUND DELANO MOVING TO THE EAST AT 20 MPH. THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING LARGE HAIL...GOLF BALL TO BASEBALL SIZE. TOWNS IN THE PATH OF THIS SEVERE THUNDERSTORM ARE ROCKFORD...LONG LAKE ...MAPLE PLAIN AND MOUND. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE ADVANCCE WARNING BAP/JHM
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 2:46 AM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 44 min |
| Jun 18, 7:54 AM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 36 min |
| Jun 18, 8:34 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Swift | 56 min |
| Jun 18, 9:03 AM CDT | Severe Thunderstorm Warning | MPX | Benton, Stearns | 17 min |
| Jun 18, 9:27 AM CDT | Severe Thunderstorm Warning | MPX | McLeod, Wright | 58 min |
| Jun 18, 9:53 AM CDT | Tornado Warning | MPX | Meeker | 22 min |
| Jun 18, 10:16 AM CDT | Severe Thunderstorm Warning | MPX | Carver | 51 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1991Every severe thunderstorm warning in 1991
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.