Alert archive / Wisconsin / Tornado Warnings in 1990

Tornado Warning 5, NWS Milwaukee, WI

July 4, 1990Walworth County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Jul 4, 1990, 7:51 PM CDT for Walworth County, Wisconsin. It was in force for 24 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1990, 7:51 PM CDT (00:51 UTC)
Expired
Jul 4, 1990, 8:15 PM CDT
In force
24 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

County Walworth 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 00:00Z, 0.9 hours before the alert went out and 204 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 00:00Z on 1990-07-05Temperature 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 00:00Z on 1990-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2093 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
59 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 KMKE 050051
TORMKE
WIC127-050130-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
751 PM CDT WED JUL 4 1990
 
THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  830 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST WISCONSIN
          ...WALWORTH
 
AT 748 PM WEATHER RADAR INDICATED A POSSIBLE TORNADO NEAR THE CITY OF
DELEVAN...46 MILES SOUTHWEST OF MILWAUKEE. THE STORM IS MOVING EAST
SOUTHEAST AT 40 MPH AND WILL BE HEADING TOWARD THE CITIES OF WILLIAMS
BAY AND LAKE GENEVA BETWEEN 800 AND 815 PM CDT.
 
TAKE COVER IMMEDIATELY.
 
 
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

Nearby

Tornado Warnings in Wisconsin, 1990Every tornado warning in 1990Tornadoes 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.