Alert archive / Wisconsin / Tornado Warnings in 1987

Tornado Warning 5, NWS Milwaukee, WI

July 29, 1987Waukesha County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Jul 29, 1987, 3:50 PM CDT for Waukesha County, Wisconsin. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Jul 29, 1987, 3:50 PM CDT (20:50 UTC)
Expired
Jul 29, 1987, 4:30 PM CDT
In force
40 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

County Waukesha 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 12:00Z, 8.8 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 1987-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 633 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 12:00Z on 1987-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
633 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
789 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 292050
TORMKE
WIC133-292145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE WI
350 PM CDT WED JUL 29 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHEAST WISCONSIN...WAUKESHA

AT 345 PM CDT...RADAR INDICATED A POSSIBLE TORNADO IN WAUKESHA
COUNTY JUST NORTH OF THE CITY OF WAUKESHA.
AT 340 PM ... 75 MPH WINDS WERE REPORTED IN PEWAUKEE IN WAUKESHA
COUNTY.

THESE STORMS WERE MOVING SOUTHEAST AT 35 MPH.

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

HAASE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 1:43 PM CDTSevere Thunderstorm WarningMKXFond du Lac57 min
Jul 29, 2:12 PM CDTSevere Thunderstorm WarningMKXOzaukee, Sheboygan63 min
Jul 29, 2:28 PM CDTSevere Thunderstorm WarningMKXWashington62 min
Jul 29, 2:41 PM CDTTornado WarningMKXWashington49 min
Jul 29, 2:47 PM CDTTornado WarningMKXOzaukee43 min
Jul 29, 3:08 PM CDTSevere Thunderstorm WarningMKXMilwaukee, Waukesha52 min
Jul 29, 3:57 PM CDTSevere Thunderstorm WarningMKXMilwaukee, Racine33 min
Jul 29, 6:03 PM CDTTornado WarningMKXClark43 min

Nearby

Tornado Warnings in Wisconsin, 1987Every tornado warning in 1987Tornadoes in 1987

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.