Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 33, NWS Green Bay, WI

June 24, 20217 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 24, 2021, 7:39 AM CDT for 7 counties in Wisconsin. It was in force for 41 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 24, 2021, 7:39 AM CDT (12:39 UTC)
Expired: Jun 24, 2021, 8:20 AM CDT
In force: 41 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Calumet County, WI, Outagamie County, WI, Portage County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 61 km from the middle of the area, began a volume at 12:41 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.

What was reported inside it

Time	Report	Where	Remark
Jun 24, 7:54 AM CDT	HAIL 0.25	Plover, WI	0.34 RAIN SO FAR
Jun 24, 8:04 AM CDT	HAIL 0.5	5 S Amherst, WI	GUSTS TO 35 MPH AND HEAVY RAIN IN THE TOWNSHIP OF LADARK
Jun 24, 8:11 AM CDT	HAIL 0.25	Weyauwega, WI
Jun 24, 8:23 AM CDT	HAIL 0.25	4 Se Appleton, WI
Jun 24, 8:24 AM CDT	HAIL 0.25	Zittau, WI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 0.7 hours before the alert went out and 324 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: 389 J/kg
Mixed-layer CIN: -353 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

369 
WUUS53 KGRB 241239
SVRGRB
WIC015-087-097-135-137-139-141-241345-
/O.NEW.KGRB.SV.W.0033.210624T1239Z-210624T1345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
739 AM CDT Thu Jun 24 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wood County in central Wisconsin...
  Southeastern Portage County in central Wisconsin...
  Calumet County in east central Wisconsin...
  Winnebago County in east central Wisconsin...
  Waushara County in central Wisconsin...
  Waupaca County in northeastern Wisconsin...
  Outagamie County in northeastern Wisconsin...

* Until 845 AM CDT.

* At 739 AM CDT, severe thunderstorms were located along a line
  extending from near Black Creek to 6 miles north of Fremont to near
  Amherst to near New Rome, moving southeast at 45 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.

* Locations impacted include...
  Appleton, Oshkosh, Stevens Point, Wisconsin Rapids, Waupaca,
  Wautoma, Menasha, Kaukauna, Little Chute and New London.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4398 8889 4398 8960 4424 8960 4425 8991
      4429 8994 4460 8937 4461 8904 4468 8877
      4468 8861 4459 8860 4459 8834 4444 8819
      4424 8819 4424 8804 4401 8804 4393 8820
      4394 8840 4389 8841 4389 8888
TIME...MOT...LOC 1239Z 327DEG 39KT 4454 8846 4434 8891 4440 8929 4426
8980

HAIL...1.00IN
WIND...60MPH
 
$$

Kieckbusch

3 follow-up statements

341 
WWUS53 KGRB 241256
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
756 AM CDT Thu Jun 24 2021

WIC141-241305-
/O.CAN.KGRB.SV.W.0033.000000T0000Z-210624T1345Z/
Wood WI-
756 AM CDT Thu Jun 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WOOD COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4398 8889 4398 8960 4424 8960 4425 8973
      4432 8970 4449 8931 4456 8903 4454 8876
      4459 8834 4444 8819 4424 8819 4424 8804
      4401 8804 4394 8819 4394 8840 4389 8841
      4389 8888
TIME...MOT...LOC 1255Z 339DEG 30KT 4438 8828 4426 8876 4429 8916 4415
8966

$$

WIC015-087-097-135-137-139-241345-
/O.CON.KGRB.SV.W.0033.000000T0000Z-210624T1345Z/
Portage WI-Calumet WI-Winnebago WI-Waushara WI-Waupaca WI-
Outagamie WI-
756 AM CDT Thu Jun 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM CDT
FOR SOUTHEASTERN PORTAGE...CALUMET...WINNEBAGO...WAUSHARA...WAUPACA
AND OUTAGAMIE COUNTIES...

At 755 AM CDT, severe thunderstorms were located along a line
extending from 6 miles north of Little Chute to near Fremont to near
Chain O' Lakes-King to 9 miles southwest of Plainfield, moving south
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.

Locations impacted include...
Appleton, Oshkosh, Waupaca, Wautoma, Menasha, Kaukauna, Little Chute,
New London, Kimberly and Chilton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4398 8889 4398 8960 4424 8960 4425 8973
      4432 8970 4449 8931 4456 8903 4454 8876
      4459 8834 4444 8819 4424 8819 4424 8804
      4401 8804 4394 8819 4394 8840 4389 8841
      4389 8888
TIME...MOT...LOC 1255Z 339DEG 30KT 4438 8828 4426 8876 4429 8916 4415
8966

HAIL...1.00IN
WIND...60MPH
 
$$
Kieckbusch

779 
WWUS53 KGRB 241311
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
811 AM CDT Thu Jun 24 2021

WIC015-087-097-135-137-139-241345-
/O.CON.KGRB.SV.W.0033.000000T0000Z-210624T1345Z/
Portage WI-Calumet WI-Winnebago WI-Waushara WI-Waupaca WI-
Outagamie WI-
811 AM CDT Thu Jun 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 AM CDT
FOR SOUTHEASTERN PORTAGE...CALUMET...WINNEBAGO...WAUSHARA...SOUTHERN
WAUPACA AND OUTAGAMIE COUNTIES...

At 811 AM CDT, severe thunderstorms were located along a line
extending from near Brillion to 10 miles east of Lake Poygan to near
Napowan Scout Camp to 9 miles west of Wautoma, moving southeast at 40
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.

Locations impacted include...
Appleton, Oshkosh, Waupaca, Wautoma, Menasha, Kaukauna, Little Chute,
New London, Kimberly and Chilton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Green Bay.

&&

LAT...LON 4398 8889 4398 8960 4424 8960 4428 8962
      4443 8924 4443 8897 4445 8875 4447 8841
      4444 8819 4424 8819 4424 8804 4401 8804
      4394 8819 4394 8840 4389 8841 4389 8888
TIME...MOT...LOC 1311Z 323DEG 34KT 4420 8818 4421 8866 4416 8904 4407
8949

HAIL...1.00IN
WIND...60MPH
 
$$
Kieckbusch

841 
WWUS53 KGRB 241320
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
820 AM CDT Thu Jun 24 2021

WIC015-087-097-135-137-139-241330-
/O.CAN.KGRB.SV.W.0033.000000T0000Z-210624T1345Z/
Portage WI-Calumet WI-Winnebago WI-Waushara WI-Waupaca WI-
Outagamie WI-
820 AM CDT Thu Jun 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PORTAGE...
CALUMET...WINNEBAGO...WAUSHARA...SOUTHERN WAUPACA AND OUTAGAMIE
COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail, 
gusty winds and torrential rain are still possible with these 
thunderstorms.

LAT...LON 4398 8889 4398 8960 4424 8960 4428 8962
      4443 8924 4443 8897 4445 8875 4447 8841
      4444 8819 4424 8819 4424 8804 4401 8804
      4394 8819 4394 8840 4389 8841 4389 8888
TIME...MOT...LOC 1319Z 327DEG 39KT 4412 8811 4413 8859 4408 8897 4399
8942

$$
Kieckbusch

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 5:24 AM CDT	Special Weather Statement	GRB	Lincoln	51 min
Jun 24, 6:17 AM CDT	Special Weather Statement	GRB	Forest, Langlade, Marathon, Oneida	58 min
Jun 24, 6:56 AM CDT	Special Weather Statement	GRB	Portage	64 min
Jun 24, 7:27 AM CDT	Special Weather Statement	GRB	Brown, Kewaunee, Outagamie, Portage, Shawano, Waupaca and 1 more	63 min
Jun 24, 8:25 AM CDT	Special Weather Statement	GRB	Calumet, Manitowoc, Waushara, Winnebago	50 min
Jun 24, 1:16 PM CDT	Special Weather Statement	GRB	Door, Oconto	59 min
Jun 24, 3:11 PM CDT	Special Weather Statement	GRB	Kewaunee	49 min
Jun 24, 3:55 PM CDT	Special Weather Statement	GRB	Kewaunee	50 min
Jun 24, 4:29 PM CDT	Special Weather Statement	GRB	Marathon	61 min
Jun 24, 5:20 PM CDT	Special Weather Statement	GRB	Wood	55 min
Jun 24, 5:52 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	38 min
Jun 24, 6:23 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.