Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 46, NWS Milwaukee, WI

September 28, 1986Milwaukee County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 28, 1986, 6:17 PM CDT for Milwaukee County, Wisconsin. It was in force for 36 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: Sep 28, 1986, 6:17 PM CDT (23:17 UTC)
Expired: Sep 28, 1986, 6:53 PM CDT
In force: 36 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

County Milwaukee 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

Time	Report	Where	Remark
Sep 28, 6:31 PM CDT	Thunderstorm Wind 50	Milwaukee, 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 12:00Z, 11.3 hours before the alert went out and 163 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 282317
SVRMKE
WIC079-101-290015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MILWAUKEE WI
617 PM CDT SUN SEP 28 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM AND 
SPECIAL MARINE WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE 
FOLLOWING COUNTIES OF

SOUTHEAST WISCONSIN...MILWAUKEE AND RACINE
...INCLUDING THE ADJACENT COASTAL WATERS OF LAKE MICHIGAN.       
.                      

AT 615 PM CDT...WEATHER RADAR INDICATED SEVERE THUNDERSTORMS
MOVING INTO WESTERN RACINE AND MILWAUKEE COUNTIES.

THE STORMS ARE EXPECTED TO MOVE THROUGH THESE COUNTIES AND OUT
OVER THE COASTAL WATERS OF LAKE MICHIGAN.

THE STORMS WERE EAST NORTHEAST AT 40 MPH.

AT 610 PM...A MUSKEGO OBSERVER REPORTED WINDS TO 35 MPH.

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

GARCIA

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 5:10 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	50 min
Sep 28, 5:44 PM CDT	Tornado Warning	MKX	Jefferson, Walworth	46 min
Sep 28, 6:00 PM CDT	Tornado Warning	MKX	Waukesha	30 min
Sep 28, 6:09 PM CDT	Severe Thunderstorm Warning	MKX	Walworth	36 min
Sep 28, 6:17 PM CDT	Severe Thunderstorm Warning	MKX	Racine	58 min
Sep 28, 6:44 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee	18 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1986 Every 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.