Alert archive / Wisconsin / Tornado Warnings in 1986

Tornado Warning 13, NWS Milwaukee, WI

September 28, 1986Jefferson County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Sep 28, 1986, 5:44 PM CDT for Jefferson County, Walworth County, Wisconsin. It was in force for 46 min.

The area

The counties it named.

The facts

Issued
Sep 28, 1986, 5:44 PM CDT (22:44 UTC)
Expired
Sep 28, 1986, 6:30 PM CDT
In force
46 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Jefferson County, WI, 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 12:00Z, 10.7 hours before the alert went out and 187 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 1986-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 583 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, Green Bay/Straub, WI at 12:00Z on 1986-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.1939587897Sfc1 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
583 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
883 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMKE 282244
TORMKE
WIC055-127-282330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE WI
544 PM CDT SUN SEP 28 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTHEAST WISCONSIN...EASTERN JEFFERSON AND NORTHWEST WALWORTH

AT 535..A REPORT WAS RECEIVED FROM THE PUBLIC OF A TORNADO 1 TO 2
MILES SOUTH OF WHITEWATER. THE ASSOCIATED THUNDERSTORM WAS MOVING
EAST NORTHEAST AT 35 MPH. PALMYRA OBSERVER IN SOUTHEAST JEFFERSON
COUNTY REPORTED WIND IN EXCESS OF 50 MPH AT 541PM.

IF THREATENING WEATHER APPROACHES YOU...TAKE COVER IMMEDIATELY.
A BASEMENT..INgTERIOR HALLWAY OR ROOM ON THE LOWEST FLOOR IS THE
SAFEST PLACE IN MOST BUILDINGS. GET UNDER SOMETHING STURDY.

DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 5:10 PM CDTSevere Thunderstorm WarningMKXJefferson50 min
Sep 28, 6:00 PM CDTTornado WarningMKXWaukesha30 min
Sep 28, 6:09 PM CDTSevere Thunderstorm WarningMKXWalworth36 min
Sep 28, 6:17 PM CDTSevere Thunderstorm WarningMKXRacine58 min
Sep 28, 6:17 PM CDTSevere Thunderstorm WarningMKXMilwaukee36 min
Sep 28, 6:44 PM CDTSevere Thunderstorm WarningMKXOzaukee18 min

Nearby

Tornado Warnings in Wisconsin, 1986Every tornado warning in 1986Tornadoes in 1986

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.