Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 26, NWS Twin Cities, MN

May 28, 1991Rice County, Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 9:47 AM CDT for Rice County, Steele County, Minnesota. It was in force for 43 min. 3 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, 9:47 AM CDT (14:47 UTC)
Expired
May 28, 1991, 10:30 AM CDT
In force
43 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Rice County, MN, Steele County, MN

What was reported inside it

TimeReportWhereRemark
May 28, 10:00 AM CDTThunderstorm Wind 0Rice, MN
May 28, 10:05 AM CDTThunderstorm Wind 0Rice, MN
May 28, 10:10 AM CDTThunderstorm Wind 0Rice, 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, 2.8 hours before the alert went out and 78 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 KRST 281447
SVRRST
MNC131-147-281530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
947 AM CDT TUE MAY 28 1991
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...RICE COUNTY...NORTHERN STEELE COUNTY
 
A LINE OF HEAVY THUNDERSTORMS WAS MOVING THROUGH BLUE EARTH
AND LE SUEUR COUNTIES. AT 935 AM THE LINE EXTENDED FROM LE SUEUR
22 MILES NORTH OF MANKATO TO ST CLAIR 9 MILES SOUTHEAST OF MANKATO.
CITIES INCLUDED IN THIS WARNING ARE NORTHFIELD...FARIBAULT AND
OWATONNA.
 
IF YOU ARE CAUGHT OUTSID'E...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 ADVANCE 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 36 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 38 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, 27 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.

IssuedProductOfficeCountiesLasted
May 28, 3:12 AM CDTSevere Thunderstorm WarningMPXRenville33 min
May 28, 8:15 AM CDTSevere Thunderstorm WarningMPXRedwood, Renville45 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, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.