Alert archive / Minnesota / Tornado Warnings in 1990

Tornado Warning 2, NWS Twin Cities, MN

June 12, 1990Sibley County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 12, 1990, 11:25 PM CDT for Sibley County, Minnesota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1990, 11:25 PM CDT (04:25 UTC)
Expired
Jun 13, 1990, 12:00 AM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Sibley 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, 4.4 hours before the alert went out and 58 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 1990-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1326 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 1990-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 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
1326 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1196 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
-0.4
Supercell composite
-2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 130426
TORMSP
MNC143-130500-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1125 PM CDT TUE JUN 12 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL MIDNIGHT CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL MINNESOTA
          ...SIBLEY
 
AT 1120 PM...A POSSIBLE TORNADO WAS INDICATED BY RADAR IN THE
GIBBON...FAIRFAX AREA OF EXTREME SOUTHWEST SIBLEY COUNTY...OR ABOUT 15
MILES SOUTHEAST OF REDWOOD FALLS. MOVEMENT WAS TO THE NORTHEAST AT 40
MILES AN HOUR. CITIES IN THE PATH OF THIS STORM INCLUDE WINTHROP AND
GAYLORD. REMEMBER...SEVERE THUNDERSTORM WARNINGS ALSO REMAIN IN EFFECT
FOR EASTERN RENVILLE AND SOUTHERN MC LEOD COUNTIES UNTIL
MIDNIGHT.
 
 
DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO.  CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS.  IF YOU ARE CAUGHT IN THE PATH OF
A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING.  IF NO
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.
PAULSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 8:13 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet32 min
Jun 12, 8:51 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Rice54 min
Jun 12, 9:43 PM CDTSevere Thunderstorm WarningMPXGoodhue47 min
Jun 12, 11:09 PM CDTSevere Thunderstorm WarningMPXMcLeod, Renville, Sibley51 min
Jun 13, 12:21 AM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Scott69 min
Jun 13, 12:21 AM CDTSevere Thunderstorm WarningMPXDakota69 min
Jun 13, 1:20 AM CDTFlash Flood WarningMPXDodge, Goodhue, Olmsted, Wabasha115 min
Jun 13, 2:05 AM CDTSevere Thunderstorm WarningMPXFreeborn25 min
Jun 13, 2:30 AM CDTSevere Thunderstorm WarningMPXFreeborn, Mower45 min

Nearby

Tornado Warnings in Minnesota, 1990Every tornado warning in 1990Tornadoes in 1990

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.