Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 77, NWS Twin Cities, MN

June 19, 1991Freeborn County, Mower County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 19, 1991, 5:45 PM CDT for Freeborn County, Mower County, Minnesota. It was in force for 45 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
Jun 19, 1991, 5:45 PM CDT (22:45 UTC)
Expired
Jun 19, 1991, 6:30 PM CDT
In force
45 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Freeborn County, MN, Mower County, MN

What was reported inside it

TimeReportWhereRemark
Jun 19, 6:00 PM CDTHail 1.75Freeborn, 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, 10.8 hours before the alert went out and 138 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 1991-06-19Temperature 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 1991-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 square meters per square second.19395878Sfc1 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
1978 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
79 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 192246
SVRRST
MNC047-099-192330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
545 PM CDT WED JUN 19 1991
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  630 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MINNESOTA
 
   ...EASTERN FREEBORN COUNTY
 
IN SOUTHEAST MINNESOTA
 
   ...WESTERN MOWER COUNTY
 
AT 545 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR
THE IOWA BORDER 15 MILES SOUTH OF ALBERT LEA. THE STORM
WAS MOVING NORTHEAST AT 25 MPH.
 
SOME CITIES INCLUDED IN THE WARNING AND IN THE PATH OF
THE SEVERE THUNDERSTORM ARE GLENVILLE...AUSTIN...ALBERT LEA
...AND MAPLE ISLAND.
 
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 PRODUaCE TORNADOS WITH LITTLE OR NO WARNING.
 
SCS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:21 PM CDTSevere Thunderstorm WarningMPXFillmore24 min
Jun 19, 6:29 PM CDTSevere Thunderstorm WarningMPXMower31 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.