Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 46, NWS Green Bay, WI

September 29, 1986Columbia County, Sauk County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Sep 29, 1986, 12:35 AM CDT for Columbia County, Sauk County, Wisconsin. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Sep 29, 1986, 12:35 AM CDT (05:35 UTC)
Expired
Sep 29, 1986, 1:30 AM CDT
In force
55 min
Issued by
NWS Green Bay, WI
Area
Whole counties

Counties Columbia County, WI, Sauk 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, 5.6 hours before the alert went out and 169 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 1986-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1557 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 00:00Z on 1986-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
1557 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
753 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSN 290538
SVRMSN
WIC021-111-290630-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MADISON WI
1235 AM CDT MON SEP 29 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 130 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTH CENTRAL WISCONSIN...CENTRAL COLUMBIA AND EASTERN SAUK

AT 1225AM CDT HEAVY WINDS AND WIND DAMAGE WAS REPORTE BY A SPOTTER
NEAR BARABOO.  THIS STORMS WAS MOVING EASTWARD AT 30 MPH.

IF THREATENING WEATHER APPROACHES YOU..BE ALERT FOR DAMAGING WINDS..
LARGE HAIL..AND DANGEROUS LIGHTNING. STAY TUNED TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION FOR FURTHER INFORMATION.

  STIMACH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 29, 1:14 AM CDTSevere Thunderstorm WarningGRBDane46 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; the sounding from the Mesonet's radiosonde archive.