Alert archive / Wisconsin / Tornado Warnings in 1991

Tornado Warning 13, NWS Green Bay, WI

July 7, 1991Dane County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 7, 1991, 3:07 PM CDT for Dane County, Wisconsin. It was in force for 33 min. 2 reports 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 7, 1991, 3:07 PM CDT (20:07 UTC)
Expired: Jul 7, 1991, 3:40 PM CDT
In force: 33 min
Issued by: NWS Green Bay, WI
Area: Whole counties

County Dane County, WI

What was reported inside it

Time	Report	Where	Remark
Jul 7, 3:13 PM CDT	Thunderstorm Wind 0	Dane, WI
Jul 7, 3:13 PM CDT	Thunderstorm Wind 0	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, 8.1 hours before the alert went out and 189 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1805 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -67 m²/s²
0-3 km storm-relative helicity: 75 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 072008
TORMSN
WIC025-072100-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MADISON WI
307 PM CDT SUN JUL 7 1991
 
THE NATIONAL WEATHER SERVICE IN MADISON HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  400 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL WISCONSIN
 
   ...EASTERN DANE COUNTY
 
AT 3:02 PM...WEATHER RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS
IN ESATERN COLUMBIA AND EASTERN DANE COUNTIES. THESE STORMS WERE RACING
EAST AT AROUND 50 MPH AND WILL BE AFFECTING DODGE AND JEFFERSON COUNTIES
TILL 4:00 PM.
 
THESE STORMS HAVE A HISTORY OF PRODUCING TORNADOES AND FUNNEL CLOUDS. A
TORNADO WAS REPORTED NEAR MIDDLETON IN CENTRAL DANE COUNTY AS THESE
STORMS MOVED THROUGH.
 
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
FELKNOR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 1:45 PM CDT	Severe Thunderstorm Warning	GRB	Iowa, Richland	60 min
Jul 7, 1:56 PM CDT	Severe Thunderstorm Warning	GRB	Columbia, Dane, Sauk	64 min
Jul 7, 2:12 PM CDT	Severe Thunderstorm Warning	GRB	Adams, Juneau	48 min
Jul 7, 2:26 PM CDT	Tornado Warning	GRB	Iowa, Sauk	34 min
Jul 7, 2:41 PM CDT	Tornado Warning	GRB	Columbia, Dane	34 min
Jul 7, 2:59 PM CDT	Tornado Warning	GRB	Dane	31 min

Nearby

Tornado Warnings in Wisconsin, 1991 Every tornado warning in 1991 Tornadoes in 1991

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.