Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 7, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 29, 1991, 4:55 PM CDT for Dakota County, Minnesota. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- Apr 29, 1991, 4:55 PM CDT (21:55 UTC)
- Expired
- Apr 29, 1991, 5:30 PM CDT
- In force
- 35 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
County Dakota County, MN
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 9.9 hours before the alert went out and 47 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 KMSP 292156 SVRMSP MNC143-037-139-292230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MINNEAPOLIS MN 455 PM CDT MON APR 29 1991 THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION S... IN CENTRAL MINNESOTA ...SIBLEY COUNTY IN EAST CENTRAL MINNESOTA ...WESTERN DAKOTA COUNTY...SCOTT COUNTY SEVERE THUNDERSTORMS WERE LOCATED FROM NICOLLET TO FARIBAULT IN NICOLLET LESEUR AND RICE COUNTIES OF SOUTH CENTRAL MINNESOTA AT 450 PM. THAT EXTENDS FROM 55 MILES SOUTHWEST TO 35 MILES SOUTH OF DOWNTOWN MINNEAPOLIS. DAMAGING WINDS ARE LIKELY WITH THESE STORMS. MOVEMENT WAS TO THE NORTH AT 60 MILES AN HOUR. CITIES INCLUDED IN THIS WARNING ARE GAYLORD LAKEVILLE BELLE PLAIN AND JORDAN. TORNADOES ARE ALSO POSSIBLE WITH THESE SEVERE THUNDERSTORMS. 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. RICHARDSON
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, 2 hours 33 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, 2 hours 27 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
Special weather statement, Apr 29, 4:38 PM CDT, 17 minutes before
MNZ010-011-012-013-014-015-016-017-018-019-WIZ003-006-292230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN 435 PM CDT MON APR 29 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR MOST OF SOUTHERN MINNESOTA AND WESTERN WISCONSIN UNTIL 800 PM CDT... ...STRONG THUNDERSTORMS APPROACHING TWIN CITIES METRO AREA... STRONG THUNDERSTORMS OVER SOUTH CENTRAL MINNESOTA WERE MOVING RAPIDLY NORTHWARD TOWARD THE GREATER TWIN CITIES METRO AREA AT 430 PM. THE STRONGEST STORMS WERE BETWEEN MANKATO AND OWATONNA. THEY WERE PART OF A LARGER AREA OF THUNDERSTORMS MAINLY LOCATED TO THE SOUTH OF A LINE FROM WORTHINGTON TO NEW ULM TO OWATONNA TO ROCHESTER. THESE STRONG STORMS HAVE PRODUCED DAMAGING WINDS AND LARGE HAIL IN NORTHERN IOWA. MOVEMENT WAS TO THE NORTH AT 40 TO 45 MILES AN HOUR AND SHOULD APPROACH THE SOUTHERN FRINGE OF THE GREATER TWIN CITIES METRO AREA OF SIBLEY...SCOTT...AND DAKOTA COUNTIES BY 500 PM. BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER APPROACHES YOU. CONTINUE TO MONITOR TV AND RADIO FOR LATER STATEMENTS AND WARNINGS. KRAFT
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 3:58 PM CDT | Severe Thunderstorm Warning | MPX | Watonwan | 32 min |
| 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 |
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.