Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 8, NWS Green Bay, WI

April 27, 1990Dane County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 27, 1990, 5:50 PM CDT for Dane County, Wisconsin. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1990, 5:50 PM CDT (22:50 UTC)
Expired
Apr 27, 1990, 6:45 PM CDT
In force
55 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Dane 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.8 hours before the alert went out and 189 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, Green Bay/Straub, WI at 12:00Z on 1990-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 1990-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
68 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 KMSN 272250
SVRMSN
WIC025-272345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MADISON WI
550 PM CDT FRI APR 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE SOUTH CENTRAL PART OF WISCONSIN
      DANE

AT 550 PM CDT NATIONAL WEATHER SERVICE RADAR DETECTED A CLUSTER
OF THUNDERSTORMS ENTERING SOUTH-CENTRAL DANE COUNTY MOVING
NORTH-NORTHEAST AT AROUND 30 MPH.  SMALL HAIL..VERY HEAVY RAIN..
AND WINDS UP TO 60 MPH HAVE BEEN REPORTED WITH THESE STORMS.
SOME CITIES IN THE PATH OF THESE STORMS INCLUDE..BELLEVILLE..
BROOKLYN..OREGON..FITCHBURG..MCFARLAND..AND MADISON.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND NEAR WINDOWS.  DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED.  MOTORISTS
SHOULD AVOID LOW WATER CROSSINGS.

IF YO;U ARE CAUGHT OUTSIDE...FIND SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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, Apr 27, 5:47 PM CDT, 3 minutes before
WIZ005-008-009-012-013-270100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
540 PM CDT THU APR 26 1990

...LINE OF VERY STRONG THUNDERSTORMS APPROACHING NORTHEAST WISCONSIN...

AT 530...RADAR INDICATED A LINE OF VERY STRONG THUNDERSTORMS FROM JUST
NORTH OF MADISON NORTHWARD TO ABOUT 30 MILES WEST OF OSHKOSH AND
EXTENDING TO JUST WEST OF WAUSAU.  THE STRONGEST STORMS WERE LOCATED
ABOUT 30 MILES WEST OF OSHKOSH...NEAR WAUTOMA TO NEAR GREEN LAKE.
THE STORMS WERE MOVING NORTHEAST AT ABOUT 30 MILES AN HOUR.

THESE STORMS WILL BE AFFECTING WINNEBAGO AND WAUPACA COUNTIES BY ABOUT
615 PM.

WIND GUSTS TO 45 TO 50 MPH...SMALL HAIL AND DANGEROUS LIGHTNING ARE
POSSIBLE WITH THESE :STORMS.

IF YOU ARE IN THE PATH OF THESE STORMS BE PREPARED TO SEEK SAFE SHELTER. EB

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 5:19 PM CDTSevere Thunderstorm WarningGRBGreen41 min

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.