Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 23, NWS Green Bay, WI

August 17, 1990Iowa County, Richland County, Sauk County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Aug 17, 1990, 9:10 PM CDT for Iowa County, Richland County, Sauk County, Wisconsin. It was in force for 65 min.

The area

The counties it named.

The facts

Issued: Aug 17, 1990, 9:10 PM CDT (02:10 UTC)
Expired: Aug 17, 1990, 10:15 PM CDT
In force: 65 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Iowa County, WI, Richland County, WI, Sauk 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, 2.2 hours before the alert went out and 214 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: 729 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 740 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 47 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 180211
SVRMSN
WIC049-103-111-180315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MADISON WI
910 PM CDT FRI AUG 17 1990
 
THE NATIONAL WEATHER SERVICE IN MADISON WIHAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH CENTRAL WISCONSIN
          ...NORTHERN IOWA...SOUTHERN RICHLAND...SOUTHERN SAUK
 
AT 905PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 12 MILES WEST OF
LONE ROCK MOVING TOWARDS THE EAST AT 10 TO 15 MPH.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
 
STIMACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 11:15 PM CDT	Flash Flood Warning	GRB	Iowa	3 hr
Aug 17, 11:58 PM CDT	Flash Flood Warning	GRB	Iowa	6 hr
Aug 18, 5:57 PM CDT	Tornado Warning	GRB	Adams, Juneau	63 min
Aug 18, 6:23 PM CDT	Tornado Warning	GRB	Green Lake, Marquette, Waushara	67 min

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; the sounding from the Mesonet's radiosonde archive.