Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 4, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 29, 1991, 3:58 PM CDT for Watonwan County, Minnesota. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Apr 29, 1991, 3:58 PM CDT (20:58 UTC)
- Expired
- Apr 29, 1991, 4:30 PM CDT
- In force
- 32 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Watonwan County, MN
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 9.0 hours before the alert went out and 126 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 266 m²/s²
- 0-3 km storm-relative helicity
- 267 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 KRST 292059 SVRRST MNC165-292130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCHESTER MN 358 PM CDT MON APR 29 1991 THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL MINNESOTA ...WESTERN WATONWAN COUNTY AT 3 50 PM RADAR INDICATED THAT A SEVERE THUNDERSTORM WAS LIKELY OCCURING NEAR FOX LAKE...10 MILE WEST OF FAIRMONT. MARTIN COUNTY SHERIFF ALSO REPORTED MARBLE SIZE HAIL WITH THIS STORM NEAR SHERBORN AT 3 45 PM. THE STORM WAS MOVING NORTH AT 40 MILE AN HOUR. WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSIDE A STRONG BUILDING DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOS WITH LITTLE OR NO WARNING.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 29, 2:22 PM CDT, 1 hour 36 minutes before
WIZ006-292000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 215 PM CDT FRI APR 26 1991 ...SEVERE THUNDERSTORM WATCH FOR A PART OF WEST CENTRAL WISCOMSIN UNTIL ...8 PM A LINE OF STRONG THUNDERSTORMS WAS LOCATED IN EXTREME WEST CENTRAL WISCONSIN EXTENDING FROM NEAR NEW RICHMOND..TO RIVER FALLS..TO ELLSWORTH..TO PLUM CITY OR ABOUT 50 MILES WEST OF EAU CLAIRE. THESE THUNDERSTORMS WERE MOVING RAPIDLY NORTH..NORTHEAST AT ABOUT 45 MPH AND ARE CAPABLE OF PRODUCING WND GUSTS OF 50 TO 60 MPH VERY HEAVY RAIN AND HAIL. PERSONS IN EASTERN POLK..ST CROIX..PIERCE..AND ALL OF BARRON AND DUNN COUNTY CAN EXPECT THIS THUNDERSTOM ACTIVITY BETWEEN 230 PM AND 3PM THIS AFTERNOON. RICHARDSON
Special weather statement, Apr 29, 2:28 PM CDT, 1 hour 30 minutes before
WIZ006-292000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS MN 215 PM CDT MON APR 29 1991 ...SEVERE THUNDERSTORM WATCH FOR A PART OF WEST CENTRAL WISCOMSIN UNTIL ...8 PM A LINE OF STRONG THUNDERSTORMS WAS LOCATED IN EXTREME WEST CENTRAL WISCONSIN EXTENDING FROM NEAR NEW RICHMOND..TO RIVER FALLS..TO ELLSWORTH..TO PLUM CITY OR ABOUT 50 MILES WEST OF EAU CLAIRE. THESE THUNDERSTORMS WERE MOVING RAPIDLY NORTH..NORTHEAST AT ABOUT 45 MPH AND ARE CAPABLE OF PRODUCING WND GUSTS OF 50 TO 60 MPH VERY HEAVY RAIN AND HAIL. PERSONS IN EASTERN POLK..ST CROIX..PIERCE..AND ALL OF BARRON AND DUNN COUNTY CAN EXPECT THIS THUNDERSTOM ACTIVITY BETWEEN 230 PM AND 3PM THIS AFTERNOON. RICHARDSON
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 4:47 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice | 28 min |
| Apr 29, 4:55 PM CDT | Severe Thunderstorm Warning | MPX | Scott, Sibley | 35 min |
| Apr 29, 4:55 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 35 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; the sounding from the Mesonet's radiosonde archive.