Alert archive / Minnesota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 83, NWS Twin Cities, MN

August 18, 1993McLeod County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 1993, 5:20 AM CDT for McLeod County, Wright County, Minnesota. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1993, 5:20 AM CDT (10:20 UTC)
Expired
Aug 18, 1993, 6:00 AM CDT
In force
40 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties McLeod County, MN, Wright County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 10.3 hours before the alert went out and 44 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 1993-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1153 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 1993-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
1153 J/kg
Mixed-layer CIN
-121 J/kg
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
58 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 KMSP 181021
SVRMSP
MNC085-171-181100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
520 AM CDT WED AUG 18 1993
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  600 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MINNESOTA
 
   ...NORTHERN MCLEOD COUNTY...WESTERN WRIGHT COUNTY
 
AT 5:19 AM A SEVERE THUNDERSTORM WAS OVER EXTREME EASTERN MEEKER COUNTY
MOVING TO THE EAST AT 40 MPH. CITIES IN THE PATH OF THIS STORM INCLUDE
HOWARD LAKE AND WAVERLY BY 6:00 AM.
 
STRONG WINDS HAVE BEEN REPORTED WITH THIS STORM...WITH A TREE DOWN JUST
EAST OF LITCHFIELD.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...LARGE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR PROTECTION
MOVE TO AN INTERIOR ROOM.  PEOPLE IN MOBILE HOMES SHOULD GO
TO A STORM SHELTER.
 
DRB/WET
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 4:46 AM CDTTornado WarningMPXBenton29 min
Aug 18, 5:24 AM CDTSevere Thunderstorm WarningMPXMeeker36 min
Aug 18, 5:52 AM CDTSevere Thunderstorm WarningMPXCarver, Wright53 min
Aug 18, 6:46 AM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet44 min
Aug 18, 6:58 AM CDTSevere Thunderstorm WarningMPXRamsey30 min
Aug 18, 6:58 AM CDTSevere Thunderstorm WarningMPXChisago, Washington47 min
Aug 18, 8:07 AM CDTSevere Thunderstorm WarningMPXDodge, Steele38 min
Aug 18, 8:45 AM CDTSevere Thunderstorm WarningMPXOlmsted15 min
Aug 18, 9:04 AM CDTSevere Thunderstorm WarningMPXWabasha, Winona41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1993Every severe thunderstorm warning in 1993

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.