Alert archive / Wisconsin / Tornado Warnings in 1986

Tornado Warning 7, NWS Green Bay, WI

July 15, 1986Dane County, Iowa County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 15, 1986, 4:47 PM CDT for Dane County, Iowa County, Wisconsin. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1986, 4:47 PM CDT (21:47 UTC)
Expired
Jul 15, 1986, 5:15 PM CDT
In force
28 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Dane County, WI, Iowa 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

Peoria Regional, IL (KPIA), launched 12:00Z, 9.8 hours before the alert went out and 263 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, Peoria Regional, IL at 12:00Z on 1986-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1217 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, Peoria Regional, IL at 12:00Z on 1986-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 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
1217 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
992 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSN 152147
TORMSN
WIC025-049-152240-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE MADISON WI
447 PM CDT TUE JUL 15 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 540 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTH CENTRAL WISCONSIN...DANE AND IOWA

AT 440 PM CDT A FUNNEL CLOUD WAS REPOORTED BY THE DANE COUNTY
SHERIFF TO BE NEAR THE GROUND ABOUT 2 1/2 MILES NORTH OF MADISON
MOVING TO THE SOUTHEAST AT ABOUR 40 MPOH.  NUMEROUS REPORTS OF
OTHER FUNNELS HAVE BEEN RECEIVED.

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

 ADDISON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 2:45 PM CDTSevere Thunderstorm WarningGRBAdams, Juneau30 min
Jul 15, 3:22 PM CDTSevere Thunderstorm WarningGRBMarquette, Waushara53 min
Jul 15, 3:22 PM CDTSevere Thunderstorm WarningGRBColumbia, Sauk53 min
Jul 15, 4:17 PM CDTSevere Thunderstorm WarningGRBWinnebago58 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.