Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 25, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 9:28 AM CDT for Le Sueur County, Waseca County, Minnesota. It was in force for 47 min. 2 reports 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
- May 28, 1991, 9:28 AM CDT (14:28 UTC)
- Expired
- May 28, 1991, 10:15 AM CDT
- In force
- 47 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Le Sueur County, MN, Waseca County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 9:29 AM CDT | Hail 1.5 | Le Sueur, MN | |
| May 28, 9:45 AM CDT | Thunderstorm Wind 0 | Waseca, 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, 2.5 hours before the alert went out and 73 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
- NaN m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 265 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 281428 SVRRST MNC079-161-281515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ROCHESTER MN 928 AM CDT TUE MAY 28 1991 THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL MINNESOTA ...LESUEUR COUNTY...NORTHERN WASECA COUNTY AT 9 20 AM RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS MOVING EAST AT 40 MILES AN HOUR THROUGH NICOLLET AND BLUE EARTH COUNTIES FROM 50 MILES NORTH OF MANKATO TO 20 MILES WEST OF MANKATO. SOME CITIES INCLUDED IN THIS WARNING...LE CENTER AND JANESVILLE. 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, May 28, 7:11 AM CDT, 2 hours 17 minutes before
MNZ014-281315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 711 AM CDT TUE MAY 28 1991 ...THUNDERSTORMS WERE MOVING ACROSS CENTRAL MINNESOTA... AT 710 AM CDT RADAR LOCATED A THUNDERSTORM WITH HEAVY RAINFALL NEAR BELGRADE...ABOUT 35 MILES SOUTHWEST OF ST CLOUD MINNESOTA. THE STORM WAS MOVING EAST-NORTHEAST AT 25 MPH AND WILL MOVE INTO COLD SPRING...ABOUT 20 MILES SOUTH OF ST CLOUD AROUND 750 AM. THIS THUNDERSTORM WILL PRODUCE HEAVY RAINS...DANGEROUS LIGHTNING AND POSSIBLE SMALL HAIL. VC NNNN
Special weather statement, May 28, 8:09 AM CDT, 1 hour 19 minutes before
MNZ014-281415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 809 AM CDT TUE MAY 28 1991 ...THUNDERSTORMS CONTINUE OVER CENTRAL MINNESOTA THIS MORNING... AT 808 AM CDT THUNDERSTORMS WERE LOCATED IN AN AREA FROM AVON OR 14 MILES WEST OF ST CLOUD...EXTENDING SOUTH TO NEAR COLD SPRING OR 18 MILES SOUTH OF ST CLOUD. THE THUNDERSTORMS WITH THE HEAVIEST RAINS WERE MOVING EAST AT 25 MPH AND WILL MOVE INTO THE ST CLOUD AREA6 AROUND 830 AM. THESE THUNDERSTORMS WILL PRODUCE HEAVY RAINS...DANGEROUS CLOUD TO GROUND LIGHTNING AND POSSIBLE SMALL HAIL. IF THE STORMS APPROACH YOUR AREA MOVE INDOORS UNTIL THEY PASS...LIGHTNING KILLS. VC NNNN
Special weather statement, May 28, 9:20 AM CDT, 8 minutes before
MNZ014-281500- SPECIAL WEATHER STATEMENT AND SHORT RANGE WEATHER SUMMARY NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 915 AM CDT TUE MAY 28 1991 ...THUNDERSTORMS CONTINUE OVER CENTRAL MINNESOTA THIS MORNING... AT 911 AM CDT SHOWERS COVERED MUCH OF CENTRAL MINNESOTA WITH A FEW ISOLATED THUNDERSTORMS EMBEDDED IN THE RAIN AREA. THE SHOWERS WERE MOVING EAST AT 25 TO 30 MPH. FOR THE REST OF THE MORNING WE EXPECT THE SHOWER ACTIVITY TO DECREASE OR DISSIPATE FROM WEST TO EAST...ENDING BETWEEN 11 AM AND NOON CDT. WITH A BREAK IN THE OVERCAST FORECASTED...TEMPERATURES WILL RISE INTO THE 70S BY 1 PM. WINDS WILL BE NORTHEAST AT 10 TO 20 MPH. VC
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 3:12 AM CDT | Severe Thunderstorm Warning | MPX | Renville | 33 min |
| May 28, 8:15 AM CDT | Severe Thunderstorm Warning | MPX | Redwood, Renville | 45 min |
| May 28, 8:28 AM CDT | Severe Thunderstorm Warning | MPX | Brown, Watonwan | 47 min |
| May 28, 9:17 AM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Nicollet | 28 min |
| May 28, 9:19 AM CDT | Severe Thunderstorm Warning | MPX | McLeod, Sibley | 41 min |
| May 28, 9:19 AM CDT | Severe Thunderstorm Warning | MPX | Renville | 22 min |
| May 28, 9:47 AM CDT | Severe Thunderstorm Warning | MPX | Rice, Steele | 43 min |
| May 28, 10:10 AM CDT | Severe Thunderstorm Warning | MPX | Dodge, Goodhue | 20 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.