Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 2, NWS Green Bay, WI

April 15, 1994Rock County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 15, 1994, 12:16 AM CDT for Rock County, Wisconsin. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Apr 15, 1994, 12:16 AM CDT (05:16 UTC)
Expired
Apr 15, 1994, 1:15 AM CDT
In force
59 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Rock County, WI

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 5.3 hours before the alert went out and 437 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, Minneapolis, MN at 00:00Z on 1994-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 1994-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2199 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
178 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 KMSN 150517
SVRMSN
WIC105-150615-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MADISON WI
1216 AM CDT FRI APR 15 1994
 
THE NATIONAL WEATHER SERVICE IN MADISON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  115 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL WISCONSIN
 
   ...ROCK COUNTY
 
AT 1215 AM CDT RADAR DETECTED A SEVERE THUNDERSTORM MOVING INTO
SOUTHWEST ROCK COUNTY SOUTH OF AVON...OR 20 MILES SOUTHWEST OF
JANESVILLE. THE SEVERE THUNDERSTORM WAS MOVING TO THE NORTHEAST AT 25 TO
30 MILES AN HOUR.
 
SOME CITIES IN THE PATH OF THIS SEVERE THUNDERSTORM ARE AFTON...HANOVER
...JANESVILLE...AND BELOIT
 
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
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.
 
PIERCE
&

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 15, 12:03 AM CDT, 13 minutes before
WIZ050-150700-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
1200 AM CDT FRI APR 15 1994

...STRONG THUNDERST0RMS HEADED TOWARD MANITOWOC COUNTY...

AT 1150 PM...STRONG THUNDERSTORMS WERE LOCATED ABOUT 30 MILES
SOUTHWEST OF MANITOWOC OR NEAR PLYMOUTH IN SHEBOYGAN COUNTY.  THESE
STORMS WERE MOVING TO THE NORTH AROUND 40 MPH AND WILL BE MOVING INTO
THE CITY OF MANITOWOC BY 1 AM CDT.

THESE STORMS LIKELY CONTAIN HEAVY RAINS...STROBNG WINDS...SMALL HAIL
AND DEADLY LIGHTNING.

IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER INDOORS.
BOATERS ON AREA LAKES AND THE LAKESHORE AREA SHOULD HEAD FOR
SHORE IMMEDIATELY.

ISAACSON

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 12:06 AM CDTSevere Thunderstorm WarningGRBColumbia54 min
Apr 15, 12:39 AM CDTSevere Thunderstorm WarningGRBJuneau66 min
Apr 15, 12:55 AM CDTSevere Thunderstorm WarningGRBDane65 min
Apr 15, 2:10 AM CDTSevere Thunderstorm WarningGRBWinnebago35 min
Apr 15, 2:30 AM CDTSevere Thunderstorm WarningGRBDane, Iowa45 min
Apr 15, 2:56 AM CDTSevere Thunderstorm WarningGRBGreen49 min
Apr 15, 3:08 AM CDTSevere Thunderstorm WarningGRBColumbia52 min
Apr 15, 3:22 AM CDTSevere Thunderstorm WarningGRBDane53 min

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.