Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 131, NWS Twin Cities, MN

September 9, 1990Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 9, 1990, 6:53 PM CDT for Saint Croix County, Wisconsin. It was in force for 67 min.

The area

The counties it named.

The facts

Issued: Sep 9, 1990, 6:53 PM CDT (23:53 UTC)
Expired: Sep 9, 1990, 8:00 PM CDT
In force: 67 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County 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 12:00Z, 11.9 hours before the alert went out and 93 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 95 J/kg
Mixed-layer CIN: -590 J/kg
Mixed-layer LCL: 1481 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 292 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 092354
SVRMSP
WIC033-091-093-109-100100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
653 PM CDT SUN SEP 9 1990
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN WEST CENTRAL WISCONSIN
          ...SOUTHERN DUNN...PEPIN...EASTERN PIERCE
          ...EASTERN ST CROIX
 
AT 650 PM...A CLUSTER OF SEVERE THUNDERSTORMS WAS LOCATED FROM 35
MILES EAST NORTHEAST OF DOWNTOWN ST PAUL NEAR CYLON...EXTENDING SOUTH
TO 35 MILES SOUTHEAST OF DOWNTOWN ST PAUL EAST OF ELLSWORTH. LARGE
HAIL AND DAMAGING WINDS HAVE BEEN REPORTED WITH THESE STORMS. MOVEMENT
WAS SOUTHEAST AT 25 MILES AN HOUR. CITIES IN THE PATH OF THIS STORM
INCLUDE GLENWOOD CITY...SPRING VALLEY...PLUM CITY...DURAND
AND CONNERSVILLE.
 
 
WHEN THUNDERSTORMS ARE OCCURRING..MOVE INSIDE A STRONG BUILDING
DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY. REMEMBER SEVERE THUNDERSTORMS
CAN AND OCCASIONALLY DO PRODUCE TORNADOS WITH LITTLE OR NO WARNING.
 
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.
NAISTAT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 5:04 PM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	56 min
Sep 9, 5:58 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pierce, Saint Croix	62 min
Sep 9, 5:58 PM CDT	Severe Thunderstorm Warning	MPX	Pepin	62 min
Sep 9, 6:23 PM CDT	Tornado Warning	MPX	Pierce	37 min
Sep 9, 6:53 PM CDT	Severe Thunderstorm Warning	MPX	Dunn, Pepin, Pierce	67 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1990 Every 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.