Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS Green Bay, WI

August 24, 2021Brown County, Kewaunee County, Manitowoc County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Aug 24, 2021, 12:05 PM CDT for Brown County, Kewaunee County, Manitowoc County, Wisconsin. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 24, 2021, 12:05 PM CDT (17:05 UTC)
Expired: Aug 24, 2021, 12:30 PM CDT
In force: 25 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brown County, WI, Kewaunee County, WI, Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 32 km from the middle of the area, began a volume at 17:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 5.1 hours before the alert went out and 29 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: 58 J/kg
Mixed-layer CIN: -344 J/kg
Mixed-layer LCL: 1387 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

893 
WUUS53 KGRB 241705
SVRGRB
WIC009-061-071-241730-
/O.NEW.KGRB.SV.W.0087.210824T1705Z-210824T1730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1205 PM CDT Tue Aug 24 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Southeastern Brown County in northeastern Wisconsin...
  Southwestern Kewaunee County in northeastern Wisconsin...
  Northern Manitowoc County in east central Wisconsin...

* Until 1230 PM CDT.

* At 1204 PM CDT, a severe thunderstorm was located 7 miles southwest
  of Denmark, or 14 miles northwest of Manitowoc, moving east at 35
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Denmark around 1210 PM CDT.
  Two Creeks around 1230 PM CDT.

Other locations impacted by this severe thunderstorm include
Mishicot, Kellnersville, Maribel, Larrabee, Curran, Wayside,
Morrison, Maple Grove, Shirley and Cooperstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4419 8804 4424 8804 4424 8806 4441 8802
      4443 8744 4417 8753
TIME...MOT...LOC 1704Z 269DEG 29KT 4425 8789 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Eckberg

2 follow-up statements

306 
WWUS53 KGRB 241711
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1211 PM CDT Tue Aug 24 2021

WIC009-061-071-241730-
/O.CON.KGRB.SV.W.0087.000000T0000Z-210824T1730Z/
Brown WI-Kewaunee WI-Manitowoc WI-
1211 PM CDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT
FOR SOUTHEASTERN BROWN...SOUTHWESTERN KEWAUNEE AND NORTHERN MANITOWOC
COUNTIES...

At 1210 PM CDT, a severe thunderstorm was located 7 miles south of
Denmark, or 12 miles northwest of Manitowoc, moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Two Creeks around 1230 PM CDT.

Other locations impacted by this severe thunderstorm include
Mishicot, Kellnersville, Maribel, Larrabee, Curran, Wayside,
Morrison, Maple Grove, Shirley and Cooperstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4419 8804 4424 8804 4440 8794 4443 8745
      4417 8753
TIME...MOT...LOC 1710Z 272DEG 29KT 4424 8781 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Eckberg

189 
WWUS53 KGRB 241717
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1217 PM CDT Tue Aug 24 2021

WIC009-061-071-241730-
/O.CON.KGRB.SV.W.0087.000000T0000Z-210824T1730Z/
Brown WI-Kewaunee WI-Manitowoc WI-
1217 PM CDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT
FOR SOUTHEASTERN BROWN...SOUTHWESTERN KEWAUNEE AND NORTHERN MANITOWOC
COUNTIES...

At 1216 PM CDT, a severe thunderstorm was located 8 miles southeast
of Denmark, or 10 miles north of Manitowoc, moving east at 30 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Two Creeks around 1235 PM CDT.

Other locations impacted by this severe thunderstorm include
Mishicot, Kellnersville, Maribel, Larrabee, Curran, Wayside,
Morrison, Maple Grove, Shirley and Cooperstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4419 8804 4424 8801 4438 8794 4443 8745
      4417 8753
TIME...MOT...LOC 1716Z 273DEG 28KT 4424 8775 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Eckberg

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 7:23 AM CDT	Special Weather Statement	GRB	Wood	52 min
Aug 24, 7:44 AM CDT	Severe Thunderstorm Warning	GRB	Marathon, Wood	76 min
Aug 24, 8:27 AM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Wood	63 min
Aug 24, 9:02 AM CDT	Special Weather Statement	GRB	Langlade, Menominee, Shawano, Waupaca	58 min
Aug 24, 9:24 AM CDT	Special Weather Statement	GRB	Portage	51 min
Aug 24, 9:37 AM CDT	Special Weather Statement	GRB	Portage	38 min
Aug 24, 9:45 AM CDT	Special Weather Statement	GRB	Waushara	60 min
Aug 24, 9:55 AM CDT	Special Weather Statement	GRB	Portage, Waushara, Winnebago	50 min
Aug 24, 9:58 AM CDT	Special Weather Statement	GRB	Wood	47 min
Aug 24, 10:28 AM CDT	Special Weather Statement	GRB	Marathon, Portage, Wood	47 min
Aug 24, 10:30 AM CDT	Special Weather Statement	GRB	Outagamie, Waupaca, Waushara, Winnebago	60 min
Aug 24, 11:24 AM CDT	Special Weather Statement	GRB	Menominee, Portage, Shawano, Waupaca	51 min
Aug 24, 11:28 AM CDT	Special Weather Statement	GRB	Brown, Calumet, Manitowoc, Outagamie, Waushara, Winnebago	62 min
Aug 24, 11:35 AM CDT	Severe Thunderstorm Warning	GRB	Waushara, Winnebago	25 min
Aug 24, 11:53 AM CDT	Special Marine Warning	GRB		2 hr
Aug 24, 12:23 PM CDT	Severe Thunderstorm Warning Considerable damage threat	GRB	Manitowoc	37 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning in 2021

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; radar from the NEXRAD Level II archive.