Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 8, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 13, 1991, 12:28 AM CDT for Benton County, Morrison 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 13, 1991, 12:28 AM CDT (05:28 UTC)
- Expired
- May 13, 1991, 1:15 AM CDT
- In force
- 47 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Benton County, MN, Morrison County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 13, 12:35 AM CDT | Thunderstorm Wind 61 | Morrison, MN | |
| May 13, 12:55 AM CDT | Thunderstorm Wind 0 | Benton, 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 00:00Z, 5.5 hours before the alert went out and 119 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
- 926 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1539 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 29 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 KSTC 130528 SVRSTC MNC009-097-130615- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 1228 AM CDT MON MAY 13 1991 THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOHAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MINNESOTA ...BENTON COUNTY...SOUTHERN MORRISON COUNTY AT 12:20 AM A CITIZEN REPORTED HAIL AS LARGE AS 1 INCH OCCURRED AT NORTH PRAIRIE MINNESOTA...15 MILES NORTH OF ST. CLOUD. THIS THUNDERSTORM WAS MOVING EAST AT 20 MPH. SOME TOWNS IN THE PATH OF THIS THUNDERSTORM ARE FOLEY...ROYALTON...AND BUCKMAN. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE dWEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. NNNN
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 12, 7:34 PM CDT, 4 hours 54 minutes before
MNZ013-130200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 720 PM CDT SUN MAY 12 1991 ...A TORNADO WATCH FOR WEST CENTRAL AND SOUTHWEST MINNESOTA UNTIL 100 AM CDT... AT 715 PM A LINE OF THUNDERSTORMS WERE DEVELOPING IN EXTREME WEST CENTRAL MINNESOTA. THESE STORMS WERE MOVING EAST AT 15 TO 20 MPH. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER HOWEVER THE POTENTIAL FOR SEVERE THUNDERSTORMS AND TORNADOS TO DEVELOP RAPIDLY IS POSSIBLE. THE THUNDERSTORMS WILL SLOWLY MOVE THROUGH BIG STONE COUNTY AND DEVELOP SOUTH INTO LAC QUI PARLE COUNTY. ANOTHER LINE OF THUNDERSTORMS FROM HURON TO SIOUX FALLS SOUTH DAKOTA WILL MOVE INTO WEST CENTRAL MINNESOTA AROUND 10 PM. PEMOPLE IN WEST CENTRAL MINNESOTA SHOULD MONITOR TV OR RADIO FOR FURTHER STATEMENTS OR WARNINGS. REMEMBER SEVERE THUNDERSTORMS AND TORNADOS CAN DEVLOP RAPIDLY WITH LITTLE OR NO WARNING. KRUSE
Special weather statement, May 12, 8:40 PM CDT, 3 hours 48 minutes before
MNZ013-130400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 830 PM CDT SUN MAY 12 1991 ...A TORNADO WATCH FOR WEST CENTRAL AND SOUTHWEST MINNESOTA UNTIL 100 AM CDT... AT 830 PM A LINE OF THUNDERSTORMS WERE DEVELOPING IN EXTREME WEST CENTRAL MINNESOTA. THE THUNDERSTORMS WERE IN SOUTHERN BIG STONE AND NORTHERN LAC QUI PARLE COUNTIES AND WERE MOVING SLOWLY EAST AT 10 MPH WHILE EXPANDING TO THE NORTH AND SOUTH. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER HOWEVER THE POTENTIAL FOR SEVERE THUNDERSTORMS AND TORNADOS TO DEVELOP RAPIDLY IS POSSIBLE. THE THUNDERSTORMS WILL SLOWLY MOVE THROUGH BIG STONE AND LAC QUI PARLE COUNTY AND THEN MOVE INTO WESTERN SWIFT AND WESTERN CHIPPEWA COUNTIES BY AFTER 9 PM. PEOPLE IN WEST CENTRAL MINNESOTA SHOULD MONITOR TV OR RADIO FOR FURTHER STATEMENTS OR WARNINGS. REMEMBER SEVERE THUNDERSTORMS AND TORNADOS CAN DEVLOP RAPIDLY WITH LITTLE OR NO WARNING. KRUSE
Special weather statement, May 12, 10:22 PM CDT, 2 hours 6 minutes before
MNZ011-013-014-130500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA 1015 PM CDT SUN MAY 12 1991 ...A TORNADO WATCH FOR WEST CENTRAL AND SOUTHWEST MINNESOTA UNTIL 100 AM CDT... ...A SEVERE THUNDERSTORM WATCH FOR NORTHWEST AND PART OF CENTRAL MINNESOTA UNTIL 300 AM CDT... AT 1015 PM A LINE OF THUNDERSTORMS WERE DEVELOPING IN WEST CENTRAL MINNESOTA. THE THUNDERSTORMS WERE IN CENTRAL KANDIYOHI TO POPE COUNTY TO JUST WEST OF ALEXANDRIA AND WERE MOVING SLOWLY EAST AT 10 MPH WHILE EXPANDING TO THE NORTH AND SOUTH. ANOTHER LINE OF THUNDERSTORMS WERE MOVING INTO EXTREME WEST CENTRAL MINNESOTA AND WERE MOVING EAST AT 20 MPH. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER HOWEVER THE POTENTIAL FOR SEVERE THUNDERSTORMS AND TORNADOS TO DEVELOP RAPIDLY IS POSSIBLE. THE FIRST LINE OF THUNDERSTORMS WILL MOVE INTO WESTERN STEARNS AND WESTERN TODD COUNTY BY 11 PM. THE OTHER LINE OF STORMS IN EXTREME WEST CENTRAL MINNES(OTA WILL SLOWLY MOVE TO THE EAST. PEOPLE IN WEST CENTRAL AND CENTRAL MINNESOTA SHOULD MONITOR TV OR RADIO FOR FURTHER STATEMENTS OR WARNINGS. REMEMBER SEVERE THUNDERSTORMS AND TORNADOS CAN DEVLOP RAPIDLY WITH LITTLE OR NO WARNING. KRUSE
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 12:40 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.