Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 3, NWS Milwaukee, WI

April 18, 1994Jefferson County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Apr 18, 1994, 6:50 PM CDT for Jefferson County, Walworth County, Wisconsin. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Apr 18, 1994, 6:50 PM CDT (23:50 UTC)
Expired
Apr 18, 1994, 7:45 PM CDT
In force
55 min
Issued by
NWS Milwaukee, WI
Area
Whole counties

Counties Jefferson County, WI, Walworth County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.8 hours before the alert went out and 187 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 1994-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 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 1994-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.19395878Sfc1 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
2617 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKE 182352
SVRMKE
WIC055-127-190045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
650 PM CDT MON APR 18 1994
 
THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  745 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST WISCONSIN
 
   ...JEFFERSON COUNTY...WALWORTH COUNTY
 
AT 645 PM...DOPPLER WEATHER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
FROM JUST EAST OF MADISON TO MONROE IN GREEN COUNTY...WHICH IS 35 MILES
SOUTHWEST OF MADISON.  THESE STORMS WERE MOVING EAST-SOUTHEAST AROUND 50
MPH.  THEY SHOULD PASS THROUGH OR CLOSE TO LAKE MILLS...JEFFERSON...FORT
ATKINSON...AND WHITEWATER BY 730 PM...THEN HEAD EASTWARD TOWARD SULLIVAN
AND ELKHORN.
 
A WIND GUST OF 63 MPH WAS REPORTED WITH ONE OF THESE STORMS AS IT PASSED
THROUGH MADISON AROUND 645 PM.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
NJ2
 
&

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 18, 5:53 PM CDT, 57 minutes before
WIZ043>047-055>057-062-063-068-069-182355-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MADISON WI
552 PM CDT MON APR 18 1994

...STRONG THUNDERSTORMS IN WESTERN WISCONSIN...

A FEW ISOLATED STRONG THUNDERSTORMS HAVE DEVELOPED IN CRAWFORD
AND GRANT COUNTIES IN WESTERN WISCONSIN WITHIN THE LAST HOUR.
THERE HAVE BEEN UNOFFICIAL REPORTS OF STRONG WINDS AND HEAVY
DOWNPOURS WITH THESE STORMS WHICH ARE LOCATED NEAR MT STERLING
...37 MILES SOUTH-SOUTHEAST OF LA CROSSE...AND MUSCODA IN GRANT
COUNTY...50 MILES NORTH-NORTHEAST OF DUBUQUE.

THE THUNDERSTORMS WERE MOVING TO THE EAST AT 40 MILES AN HOUR.
PERSONS IN RICHLAND AND IOWA COUNTIES SHOULD BE ON THE ALERT FOR THE
APPROACH OF THESE STORMLS AND BE PREPARED TO TAKE SHELTER

MC MAHON
Special weather statement, Apr 18, 6:05 PM CDT, 45 minutes before
WIZ051-052-058>060-064>066-070>072-502-190200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
600 PM CDT MON APR 18 1994

...SHOWERS AND THUNDERSTORMS APPROACHING SOUTHEAST WISCONSIN...

AT 600 PM WEATHER RADAR SHOWED SCATTERED SHOWERS AND THUNDERSTORMS MOVING
FROM SOUTHWEST INTO SOUTH CENTRAL WISCONSIN.  THE LEADING EDGE OF THE
STORMS WAS EAST OF LONE ROCK RACING EAST AT 45 TO 50 MPH.

THE SCATTERED STORMS ARE EXPECTED TO MOVE INTO FAR SOUTHERN DODGE...
JEFFERSON AND WALWORTH COUNTIES AROUND 7 PM...AND THEN INTO WAUKESHA
...MILWAUKEE...RACINE AND KENOSHA COUNTIES BY 8 PM.

THESE STORMS CONTAIN BRIEF VERY HEAVY RAIN AND STRONG GUSTY WINDS.
IF YOU SEE THESE STORMS APPROACHING FROM THE WEST TAKE SHELTER.

SANDLER

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1994Every severe thunderstorm warning in 1994

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.