Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 65, NWS Twin Cities, MN

June 13, 1991Pierce County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 13, 1991, 1:25 PM CDT for Pierce County, Saint Croix County, Wisconsin. It was in force for 50 min.

The area

The counties it named.

The facts

Issued
Jun 13, 1991, 1:25 PM CDT (18:25 UTC)
Expired
Jun 13, 1991, 2:15 PM CDT
In force
50 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Pierce County, WI, Saint Croix County, WI

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 6.4 hours before the alert went out and 92 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 1991-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1572 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 12:00Z on 1991-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939Sfc1 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
1572 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1120 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
117 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 131826
SVRMSP
WIC093-109-131915-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
125 PM CDT THU JUN 13 1991
 
THE NATIONAL WEATHER SERVICE IN MINNEAPOLIS HAS ISSUED A
SEVERE THUNDERSTORM WARNING     EFFECTIVE UNTIL  215 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL WISCONSIN
 
   ...WESTERN PIERCE COUNTY...ST CROIX COUNTY
 
...AT 120 PM CDT..58 MPH WINDS WERE REPORTED IN A SEVERE THUNDERSTORM
IN SOUTHERN WASHINGTON COUNTY IN EASTCENTRAL MINNESOTA..ABOUT 15
MILES SOUTHEAST OF DOWNTOWN ST. PAUL.
 
THE MOVEMENT ON THIS STORM IS NORTH NORTHEAST AT 30 MPH WHICH WOULD
CARRY IT ACROSS PRESCOTT..RIVER FALLS IN PIERCE COUNTY AND HUDSON
IN ST. CROIX COUNTY BY 215 PM CDT THIS THURSDAY.
 
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.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...0
AND DEADLY LIGHTNING ARE ALL POSSIBLE. REMEMBER SEVERE THUNDERSTORMS
CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE ADVANCE WARNING

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 13, 12:30 PM CDT, 55 minutes before
MNZ014-015-016-018-019-132000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1225 PM CDT THU JUN 13 1991

...STRONG THUNDERSTORMS DEVELOPING OVER PORTIONS OF TWIN CITIES
METROPOLITIAN AREA...

STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WERE DEVELOPING VERY RAPIDLY
IN AN ENVIRONMENT OF EXPLOSIVE PROPORTIONS. STRONGEST THUNDERSTORMS
WERE SITUTATED ON THE WEST AND NORTHWEST OF THE DOWNTOWN AREA ACROSS
WESTERN HENNEPIN AND EASTERN WRIGHT COUNTIES. THESE STORMS DEFINATELY
HAVE THE POTIENTAL FOR HEAVY DOWNPOURS AND MAY PRODUCE SOME HAIL.
DANGEROUS LIGHTNING STRIKES ARE ALSO INDICATED WITH THESE STORMS. THESE
THUNDERSTORMS ELEMENTS HAVE BEEN CONFIRMED BY HENNEPIN COUNTY LAW
ENFORCEMENT.

ADDITIONAL THUNDERSTORMS CONTINUE TO DEVELOP SOUTH OF THE METROPOLITIAN
AREA AND WILL BE ENTERING SOUTHERN SCOTT COUNTY BY 1230 PM CDT. THESE
THUNDERSTORMS WILL MOVE INTO CARVER COUNTY...THE SITE OF THE U.S. OPEN.
HAIL...FREQUENT DANGEROUS LIGHTNING...STRONG WINDS AND VERY HEAVY
RAINS WILL BE POSSIBLE OVER PORTIONS OF CARVER COUNTY BY 1245 PM.
BE PREPARED TO SEEK SAFE SHELTER IF THREATENING WEATHER APPROACHES.
RND

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991Every severe thunderstorm warning in 1991

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.