Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 63, NWS Twin Cities, MN

June 9, 1991Chippewa County, Lac qui Parle County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 9, 1991, 2:14 PM CDT for Chippewa County, Lac qui Parle County, Swift County, Minnesota. It was in force for 31 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 9, 1991, 2:14 PM CDT (19:14 UTC)
Expired
Jun 9, 1991, 2:45 PM CDT
In force
31 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Chippewa County, MN, Lac qui Parle County, MN, Swift County, MN

What was reported inside it

TimeReportWhereRemark
Jun 9, 2:25 PM CDTHail 1Lac Qui Parle, 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, 7.2 hours before the alert went out and 176 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 1991-06-09Temperature 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 1991-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
NaN m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
142 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTC 091914
SVRSTC
MNC023-073-151-091945-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
214 PM CDT SUN JUN 9 1991
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA   HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL MINNESOTA
 
   ...WESTERN CHIPPEWA COUNTY...EASTERN LAC QUI PARLE COUNTY
   ...WESTERN SWIFT COUNTY
 
AT 2 10 PM CDT A THUNDERSTORM WITH VERY HEAVY RAIN...LARGE HAIL
AND DAMAGING WINDS WAS LOCATED 55 MILES WEST OF WILLMAR MINNESOTA
OVER THE CITY OF MADISON IN LAC QUI PARLE COUNTY.
 
THIS THUNDERSTORM WAS MOVING EAST AT 25 MPH AND WILL MOVE OVER THE
TOWNS OF APPLETON IN SWIFT COUNTY AND MILAN IN CHIPPEWA COUNTY BETWEEN
2 15 AND 2 45 PM CDT.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER 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, Jun 9, 1:49 PM CDT, 25 minutes before
MNZ013-091945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
149 PM CDT SUN JUN 9 1991

AT 1 45 PM CDT A THUNDERSTORM WITH VERY HEAVY RAIN AND POSSIBLE
LARGE HAIL WAS JUST CROSSING FROM SOUTH DAKOTA INTO WEST CENTRAL
MINNESOTA NEAR THE TOWN OF MARIETTA IN LAC QUI PARLE COUNTY. NO
SEVERE WEATHER HAD BEEN REPORTED FROM THIS THUNDERSTORM BUT THE
STORMS APPEARANCE ON RADAR SHOWS THAT IT COULD EASILY PRODUCE
LARGE HAIL.

THIS THUNDERSTORM WILL MOVE EAST NORTHEAST AT ABOUT 25 MPH. BETWEEN
2 AND 2 30 PM CDT THE STORM WILL MOVE OVER THE TOWNS OF MADISON AND
DAWSON IN LAC QUI PARLE COUNTY...AND POSSIBLY REACH MILAN IN CHIPPEWA
COUNTY.

PEOPLE IN WEST CENTRAL MINNESOTA SHOULD BE VERY ALERT FOR THE REST
OF THE AFTERNOON. THOSE OUT ON AREA LAKES SHOULD BE READY TO HEAD
TO SHORE IF THE SKY BECOMES THREATENING. LIGHTNING WILL ALSO BE A
BIG DANGER WITH THESE STORMS. GET INSIDE WHEN THE STOMRS APPROACH
YOUR AREA.

W`DV

NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 3:05 PM CDTSevere Thunderstorm WarningMPXChippewa, Kandiyohi, Swift40 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.