Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 70, NWS Twin Cities, MN

June 18, 1991Lac qui Parle County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 18, 1991, 7:54 AM CDT for Lac qui Parle County, Minnesota. It was in force for 36 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: Jun 18, 1991, 7:54 AM CDT (12:54 UTC)
Expired: Jun 18, 1991, 8:30 AM CDT
In force: 36 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Lac qui Parle County, MN

What was reported inside it

Time	Report	Where	Remark
Jun 18, 8:22 AM CDT	Hail 0.75	Lac Qui Parle, MN
Jun 18, 8:40 AM CDT	Hail 0.75	Lac 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

Aberdeen, SD (KHON), launched 12:00Z, 0.9 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-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: 64 J/kg
Mixed-layer CIN: -436 J/kg
Mixed-layer LCL: 1761 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSTC 181254
SVRSTC
MNC073-181330-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST CLOUD MINNESOTA
754 AM CDT TUE JUN 18 1991
 
THE NATIONAL WEATHER SERVICE IN ST CLOUD MINNESOTA   HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MINNESOTA
 
   ...LAC QUI PARLE COUNTY
 
INCLUDING THE CITIES OF MARIETTA AND MADISON.
 
AT 750 AM CDT A SEVERE THUNDERSTORM WAS LOCATED 75 WEST OF WILLMAR
OR 10 WEST OF MARIETTA MOVING EAST AT 35 MPH.
 
THIS THUNDERSTORM WILL BE MOVING THROUGH MARIETTA AT 810 AM CDT
AND THROUGH THE MADISON AREA AT 830 AM 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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 2:46 AM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	44 min
Jun 18, 8:34 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	56 min
Jun 18, 9:03 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Stearns	17 min
Jun 18, 9:27 AM CDT	Severe Thunderstorm Warning	MPX	McLeod, Wright	58 min
Jun 18, 9:53 AM CDT	Tornado Warning	MPX	Meeker	22 min
Jun 18, 10:16 AM CDT	Severe Thunderstorm Warning	MPX	Carver	51 min
Jun 18, 10:33 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin	57 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.