Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 21, NWS Green Bay, WI

July 4, 1990Rock County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 4, 1990, 7:06 PM CDT for Rock County, Wisconsin. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Jul 4, 1990, 7:06 PM CDT (00:06 UTC)
Expired
Jul 4, 1990, 8:15 PM CDT
In force
69 min
Issued by
NWS Green Bay, WI
Area
Whole counties

County Rock 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 00:00Z, 0.1 hours before the alert went out and 216 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 00:00Z on 1990-07-05Temperature 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, Green Bay/Straub, WI at 00:00Z on 1990-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -41 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
2093 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-41 m²/s²
0-3 km storm-relative helicity
59 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 050008
SVRMSN
WIC105-050115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MADISON WI
706 PM CDT WED JUL 4 1990
 
THE NATIONAL WEATHER SERVICE IN MADISON WIHAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL WISCONSIN
          ...ROCK
 
AT 6:50 PM CDT RADAR DETECTED A SEVERE THUNDERSTORM NORTHWEST OF
JANESVILLE OR ABOUT 20 MILES SOUTH-SOUTHEAST OF MADISON MOVG TO THE
EAST AT 15 MPH OTHER TOWNS IN THE PATH OF THESE STORMS
ARE..MILTON..AFTON JOHNSTOWN AND EMERALD GROVE..THE GREEN COUNTY
SHERIFF REPORTED 1/2 DOLLAR SIZE HAIL WITH THESE SAME STORMS..
 
 
WHEN THUNDERSTORMS ARE OCCtURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1990Every severe thunderstorm warning in 1990

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.