Alert archive / Minnesota / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 101, NWS Twin Cities, MN

August 31, 1989McLeod County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 31, 1989, 11:36 PM CDT for McLeod County, Minnesota. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Aug 31, 1989, 11:36 PM CDT (04:36 UTC)
Expired
Sep 1, 1989, 12:15 AM CDT
In force
39 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County McLeod County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 4.6 hours before the alert went out and 53 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 1989-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 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 1989-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939587897Sfc1 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
595 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
290 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 010436
SVRMSP
MNC085-010515-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1136 PM CDT THU AUG 31 1989
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL MINNESOTA
          ...EASTERN MCLEOD
 
AT 1125 PM CDT HAIL FROM GOLFBALL TO BASEBALL SIZE WAS REPORTED IN AND
AROUND THE CITY OF HUTCHINSON LOCATED IN WESTERN MC CLOUD COUNTY ABOUT
50 MILES WEST OF DOWNTOWN MINNEAPOLIS THIS SEVERE THUNDERSTORM WILL
PASS NEAR THE CITIES OF LESTER PRAIRIE AND
GLENCO DURING THE NEXT HALF HOUR. MOVEMENT WAS EAST AT 35 TO 40 MPH.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
DOMBROWSKY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 7:06 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn39 min
Aug 31, 7:38 PM CDTSevere Thunderstorm WarningMPXDodge, Mower, Olmsted37 min
Aug 31, 7:38 PM CDTSevere Thunderstorm WarningMPXFreeborn, Steele37 min
Aug 31, 8:18 PM CDTSevere Thunderstorm WarningMPXFaribault, Martin27 min
Aug 31, 10:41 PM CDTSevere Thunderstorm WarningMPXPope34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1989Every severe thunderstorm warning in 1989

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.