Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 65, NWS Twin Cities, MN

June 20, 1990Polk County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 1990, 7:11 PM CDT for Polk County, Saint Croix County, Wisconsin. It was in force for 34 min.

The area

The counties it named.

The facts

Issued
Jun 20, 1990, 7:11 PM CDT (00:11 UTC)
Expired
Jun 20, 1990, 7:45 PM CDT
In force
34 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Polk County, WI, Saint Croix County, WI

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, 0.2 hours before the alert went out and 101 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 1990-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 28 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 1990-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
28 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1581 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
41 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 210013
SVRMSP
WIC095-109-210045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
711 PM CDT WED JUN 20 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  740 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN WEST CENTRAL WISCONSIN
          ...SOUTHERN POLK...ST CROIX
 
AT 7 PM...WIND DAMAGE OCCURRED 5 MILES EAST OF FOREST LAKE
MINNESOTA...OR ABOUT 25 MILES NORTHEAST OF DOWNTOWN ST PAUL.
TREES WERE DOWNED. THIS STORM IS MOVING INTO THE WESTERN
WISCONSIN COUNTIES OF SOUTHERN POLK AND ALL OF ST. CROIX
AND WILL AFFECT THE CITIES OF ST CROIX FALLS...NEW RICHMOND...
AND HUDSON BY 730 PM.  MOVEMENT OF THE STORM WAS SOUTHEAST
AT 45 MILES AN HOUR.
 
 
 
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 LO_WEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
KRAUSE

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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.