Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 4, NWS Milwaukee, WI

April 19, 1996Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 19, 1996, 10:20 PM CDT for Rock County, Wisconsin. It was in force for 40 min. 2 reports 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 19, 1996, 10:20 PM CDT (03:20 UTC)
Expired
Apr 19, 1996, 11:00 PM CDT
In force
40 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

County Rock County, WI

The radar

The Milwaukee radar (KMKX), 54 km from the middle of the area, began a volume at 03:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Apr 19, 10:30 PM CDTThunderstorm WindBeloit, WI
Apr 19, 10:40 PM CDTThunderstorm WindClinton, 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.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 166 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, Davenport, at 00:00Z on 1996-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 92 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, Davenport, at 00:00Z on 1996-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 497 square meters per square second.1939587897117Sfc1 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
92 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1735 m above ground
0-6 km bulk shear
89 kt
0-1 km storm-relative helicity
497 m²/s²
0-3 km storm-relative helicity
621 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 200321 RRA
SVRMKE
WIC105-200400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1020 PM CDT FRI APR 19 1996

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 11 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL WISCONSIN

   ...ROCK COUNTY

 
THE SEVERE THUNDERSTORM WARNING IN EFFECT UNTIL 1020 PM HAS BEEN
EXTENDED UNTIL 11 PM.

A SEVERE THUNDERSTORM WILL MOVE THROUGH EASTERN ROCK COUNTY BETWEEN
1020 AND 11 PM. LARGE HAIL AND WIND GUSTS TO 60 MPH ARE LIKELY
WITH THIS STORM.

GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS. A TORNADO
WATCH IS IN EFFECT.P SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES.

EISE/BROWNING

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 9:23 PM CDTSevere Thunderstorm WarningMKXGreen, Rock57 min
Apr 19, 10:12 PM CDTSevere Thunderstorm WarningMKXWalworth58 min
Apr 19, 10:52 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine68 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1996Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.