Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 76, NWS Twin Cities, MN

June 18, 1991Fillmore County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 1991, 7:21 PM CDT for Fillmore County, Minnesota. It was in force for 24 min.

The area

The counties it named.

The facts

Issued
Jun 18, 1991, 7:21 PM CDT (00:21 UTC)
Expired
Jun 18, 1991, 7:45 PM CDT
In force
24 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Fillmore County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.4 hours before the alert went out and 178 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 00:00Z on 1991-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 199 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 1991-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 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
199 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1675 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 190023
SVRRST
MNC045-190100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
721 PM CDT TUE JUN 18 1991
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER MN HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST MINNESOTA
 
   ...SOUTHERN FILMORE COUNTY
 
AT 7 10 PM RADAR INDICATED A SEVERE THUNDERSTORM NEAR BRISTOL...37 MILES
SOUTHEAST OF ROCHESTER IN SOUTHERN FILLMORE COUNTY. MOVEMENT WAS
SOUTHEAST.
 
SOME CITIES IN THE PATH OF THIS STORM INCLUDE GRANGER AND HARMONY
 
 
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 PRODUCE TORNADOS WITH LITTLE OR NO 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

Local storm report, Jun 18, 2:40 PM CDT, 4 hours 41 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
230 PM CDT TUE JUN 11 1991

...ATTN SELS...AM STORMS ON THE 18TH...

822 AM CDT   3/4 INCH HAIL AT MADISON MINNESOTA IN LAC QUI PARLE COUNTY.

840 AM CDT   3/4 INCH HAIL AT DAWSON MINNESOTA IN LAC QUI PARLE COUNTY.

903 AM CDT   1 INCH HAIL AT SAUK RAPIDS IN BENTON COUNTY.

917 AM CDT   2 1/2 INCH HAIL 1 MILES WEST OF LITCHFIELD IN MEEKER COUNTY
             NOTE* HAIL THE SIZE OF BASEBALLS COVERED THE GROUND.

925 AM CDT   2 1/2 INCH HAIL REPORTED ALONG COUNTY ROAD BETWEEN LAKE
             STELLA AND LAKE MANUELLA IN MEEKER COUNTY.
             NOTE* HAIL STORM DROPPED SWATH OF LARGE HAIL FOR 22 MINUTES

945 AM CDT   TORNADO REPORTED 4 MILES NORTH OF GROVE CITY IN MEEKER
             COUNTY.

VC
Local storm report, Jun 18, 2:42 PM CDT, 4 hours 39 minutes before
LOCAL STORM REPORT...CORRECTED FOR DATELINE.
NATIONAL WEATHER SERVICE ST CLOUD MN
230 PM CDT TUE JUN 18 1991

...ATTN SELS...AM STORMS ON THE 18TH...

822 AM CDT   3/4 INCH HAIL AT MADISON MINNESOTA IN LAC QUI PARLE COUNTY.

840 AM CDT   3/4 INCH HAIL AT DAWSON MINNESOTA IN LAC QUI PARLE COUNTY.

903 AM CDT   1 INCH HAIL AT SAUK RAPIDS IN BENTON COUNTY.

917 AM CDT   2 1/2 INCH HAIL 1 MILES WEST OF LITCHFIELD IN MEEKER COUNTY
             NOTE* HAIL THE SIZE OF BASEBALLS COVERED THE GROUND.

925 AM CDT   2 1/2 INCH HAIL REPORTED ALONG COUNTY ROAD BETWEEN LAKE
             STELLA AND LAKE MANUELLA IN MEEKER COUNTY.
             NOTE* HAIL STORM DROPPED SWATH OF LARGE HAIL FOR 22 MINUTES

945 AM CDT   TORNADO REPORTED 4 MILES NORTH OF GROVE CITY IN MEEKER
             COUNTY.

VC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 5:45 PM CDTSevere Thunderstorm WarningMPXFreeborn, Mower45 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; the sounding from the Mesonet's radiosonde archive.