Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 44, NWS Twin Cities, MN

June 12, 1990Dakota County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 12, 1990, 6:13 PM CDT for Dakota County, Minnesota. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Jun 12, 1990, 6:13 PM CDT (23:13 UTC)
Expired
Jun 12, 1990, 6:45 PM CDT
In force
32 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

County Dakota 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 12:00Z, 11.2 hours before the alert went out and 47 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 1990-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 966 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 1990-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
966 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
781 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 122315
SVRMSP
MNC037-122345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
613 PM CDT TUE JUN 12 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  645 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN EAST CENTRAL MINNESOTA
          ...DAKOTA
 
THE SEVERE THUNDERSTORM WARNING FOR DAKOTA COUNTY HAS BEEN EXTENDED TO
645 PM AS SEVERE THUNDERSTORMS CONTINUE TO FORM AND MOVE ACROSS THE
COUNTY.
 
IN ADDITION TO THE SEVERE THUNDERSTORMS AFFECTING DAKOTA COUNTY,
SEVERAL REPORTS OF STANDING WATER AND FLOODING OF LOW LYING AREAS WITH
WATER 3 TO 4 FEET DEEP HAVE BEEN RECEIVED SINCE 530 PM.
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
 
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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 12:38 AM CDTSevere Thunderstorm WarningMPXPope, Stearns37 min
Jun 12, 1:10 AM CDTSevere Thunderstorm WarningMPXMorrison, Todd35 min
Jun 12, 4:45 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Sibley60 min
Jun 12, 5:01 PM CDTSevere Thunderstorm WarningMPXScott44 min
Jun 12, 5:02 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur28 min
Jun 12, 5:34 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Ramsey41 min
Jun 12, 5:55 PM CDTSevere Thunderstorm WarningMPXWashington50 min
Jun 12, 6:03 PM CDTSevere Thunderstorm WarningMPXRice27 min
Jun 12, 6:29 PM CDTSevere Thunderstorm WarningMPXGoodhue31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1990Every severe thunderstorm warning 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.