Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 20, NWS Twin Cities, MN

May 28, 1991Redwood County, Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 8:15 AM CDT for Redwood County, Renville County, Minnesota. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
May 28, 1991, 8:15 AM CDT (13:15 UTC)
Expired
May 28, 1991, 9:00 AM CDT
In force
45 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Redwood County, MN, Renville County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 1.3 hours before the alert went out and 123 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 1991-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1991-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMSP 281314
SVRMSP
MNC129-127-281400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
815 AM CDT TUE MAY 28 1991
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  900 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MINNESOTA
 
   ...SOUTHERN RENVILLE COUNTY
 
IN SOUTHWEST MINNESOTA
 
   ...REDWOOD COUNTY
 
AT 813 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES WEST OF
REDWOOD FALLS MOVING TO THE EAST AT 35 MILES AN HOUR.
 
SOME CITIES INCLUDED IN THE WARNING ARE VESTA...WABASSO AND REDWOOD
FALLS.
 
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 LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
DWE

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, 1 hour 4 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, 6 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

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 28, 3:12 AM CDTSevere Thunderstorm WarningMPXRenville33 min
May 28, 8:28 AM CDTSevere Thunderstorm WarningMPXBrown, Watonwan47 min
May 28, 9:17 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Nicollet28 min
May 28, 9:19 AM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley41 min
May 28, 9:19 AM CDTSevere Thunderstorm WarningMPXRenville22 min
May 28, 9:28 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Waseca47 min
May 28, 9:47 AM CDTSevere Thunderstorm WarningMPXRice, Steele43 min
May 28, 10:10 AM CDTSevere Thunderstorm WarningMPXDodge, Goodhue20 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.