Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 22, NWS Green Bay, WI

July 18, 1990Dane County, Green County, Rock County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 18, 1990, 12:47 PM CDT for Dane County, Green County, Rock County, Wisconsin. It was in force for 58 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: Jul 18, 1990, 12:47 PM CDT (17:47 UTC)
Expired: Jul 18, 1990, 1:45 PM CDT
In force: 58 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Dane County, WI, Green County, WI, Rock 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
Jul 18, 12:51 PM CDT	Hail 1	Dane, 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, 5.8 hours before the alert went out and 212 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: 1306 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 165 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 181747
SVRMSN
WIC025-045-105-181845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MADISON WI
1247 PM CDT WED JUL 18 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 145 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTH CENTRAL PART OF WISCONSIN
      DANE...GREEN...ROCK

AT 12:40 PM CDT RADAR INDICATED A SEVERE THUDERSTORM JUST WEST OF MT
. HOREB OR ABOUT 30 MILES SOUTHEST OF MADISON MOVING THE EAST AT 30
MILES AND HOUR..OTHER CITIES IN THE PATH OF THESE STORMS ARE MADISON
..CLEVEVILLE..FITCHBURG..MONONA..NEW GLARUS..EDGERTON AND OREGON.

THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY LIGHTNING.  PEOPLE OUTSIDE
SHOULD MOVE TO SHELTER...PREFERABLY INSIDE A STRONG BUILDING.  ONCE
INSIDE...STAY AWAY FROM WINDOWS.

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND NEAR WINDOWS.  DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED.  MOTORISTS
SHOULD AVOID LOW WATER CROSSINGS.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL..g.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 ROADWAYS QUICKLY...
AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.

GRIMM

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.