Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 23, NWS Twin Cities, MN

May 28, 1991McLeod County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 1991, 9:19 AM CDT for McLeod County, Sibley County, Minnesota. It was in force for 41 min. 1 report 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, 9:19 AM CDT (14:19 UTC)
Expired: May 28, 1991, 10:00 AM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties McLeod County, MN, Sibley County, MN

What was reported inside it

Time	Report	Where	Remark
May 28, 9:30 AM CDT	Thunderstorm Wind 0	Sibley, 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, 2.3 hours before the alert went out and 54 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 281419
SVRMSP
MNC129-085-143-281500-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
919 AM CDT TUE MAY 28 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1000 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE CENTRAL PART OF MINNESOTA
      EASTERN RENVILLE...MCLEOD...SIBLEY

A LINE OF SEVERE THUNDERSTORMS IS MOVING AT 40 MPH ACROSS
MCLEOD...SIBLEY AND EASTERN RENVILLE COUNTIES THROUGH 10 AM.

TOWNS IN THE PATH OF THIS LINE OF STORMS ARE HUTCHINSON...
GAYLORD AND GLENCOE.

THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 75 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.
$
JHM

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 8 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 10 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.

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	Renville	22 min
May 28, 9:28 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Waseca	47 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, 1991 Every 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.