Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 2, NWS Green Bay, WI

April 25, 1986Dane County, Green County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 25, 1986, 7:37 PM CST for Dane County, Green County, Wisconsin. It was in force for 68 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 25, 1986, 7:37 PM CST (01:37 UTC)
Expired
Apr 25, 1986, 8:45 PM CST
In force
68 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Dane County, WI, Green County, WI

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 25, 7:43 PM CSTHail 1.75Dane, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.6 hours before the alert went out and 212 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 1986-04-26Temperature 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 1986-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 242 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1486 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
242 m²/s²
0-3 km storm-relative helicity
432 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 260137
SVRMSN
WIC025-045-260245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MADISON WI
ISSUED BY MILWAUKEE WI
737 PM CST FRI APR 25 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 845 PM CST FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTH CENTRAL WISCONSIN...DANE AND NORTHERN GREEN

AT 730 PM CST RADAR INDICATED A SEVERE THUNDERSTORM 30 MILES
SOUTH SOUTHWEST OF MADISON NEAR MONTICELLO MOVING TOWARD
THE NORTH NORTHEAST AT 40 MPH. THIS STORM SHOULD ARRIVE AT THE
MADISON AREA BY 800PM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND
DEADLY LIGHTNING. TORNADOES CAN ALSO DEVELOP FROM TSEVERE
THUNDERSTORMS.   IF THREATENING WEATHER APPROACHES...TAKE SHELTER
IMMEDIATELY.

 ADDISON/TZ

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 25, 7:31 PM CSTSevere Thunderstorm WarningGRBColumbia, Dane, Sauk59 min
Apr 25, 7:58 PM CSTSevere Thunderstorm WarningGRBWaushara62 min
Apr 25, 8:21 PM CSTSevere Thunderstorm WarningGRBGreen42 min
Apr 25, 8:21 PM CSTSevere Thunderstorm WarningGRBDane, Rock69 min
Apr 25, 8:35 PM CSTSevere Thunderstorm WarningGRBAdams55 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1986Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.