Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 21, NWS Green Bay, WI

May 28, 1991Shawano County, Waupaca County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 28, 1991, 1:07 PM CDT for Shawano County, Waupaca County, Wisconsin. It was in force for 68 min. 3 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: May 28, 1991, 1:07 PM CDT (18:07 UTC)
Expired: May 28, 1991, 2:15 PM CDT
In force: 68 min
Issued by: NWS Green Bay, WI
Area: Whole counties

Counties Shawano County, WI, Waupaca County, WI

What was reported inside it

Time	Report	Where
May 28, 1:25 PM CDT	Thunderstorm Wind 0	Shawano, WI
May 28, 1:45 PM CDT	Hail 1.75	Shawano, WI
May 28, 2:10 PM CDT	Hail 1.75	Waupaca, 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, 6.1 hours before the alert went out and 63 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: 1199 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 972 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGRB 281807
SVRGRB
WIC067-078-083-115-135-281915-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE GREEN BAY WI
107 PM CDT TUE MAY 28 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 215 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF WISCONSIN
      LANGLADE...

   IN THE NORTHEAST PART OF WISCONSIN
      MENOMINEE...OCONTO...SHAWANO...

   IN THE EAST CENTRAL PART OF WISCONSIN
      NORTHERN WAUPACA...

A LINE OF SEVERE THUNDERSTORMS WILL MOVE INTO THESE COUNTIES DURING
THE NEXT HOUR. DAMAGING WINDS IN THE 50 TO 60 MPH RANGE...HEAVY RAIN
AND DANGEROUS LIGHTNING WILL ACCOMPANY THESE STORMS. THE STORMS WERE
MOVING EAST AT 50 TO 55 MPH.

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.

MECIKALSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 8:11 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest	64 min
May 27, 10:21 PM CDT	Severe Thunderstorm Warning	GRB	Marinette	39 min
May 28, 1:07 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Menominee, Oconto	68 min
May 28, 2:06 PM CDT	Severe Thunderstorm Warning	GRB	Waupaca	14 min
May 28, 2:06 PM CDT	Severe Thunderstorm Warning	GRB	Menominee	14 min
May 28, 2:06 PM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	54 min
May 28, 2:06 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie, Shawano	54 min
May 28, 3:04 PM CDT	Tornado Warning	GRB	Brown	31 min
May 28, 3:04 PM CDT	Tornado Warning	GRB	Door	31 min
May 28, 3:04 PM CDT	Tornado Warning	GRB	Kewaunee	56 min
May 28, 3:37 PM CDT	Tornado Warning	GRB	Kewaunee	38 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1991 Every severe thunderstorm warning 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.