Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 57, NWS Green Bay, WI

July 28, 20214 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 28, 2021, 8:37 PM CDT for 4 counties in Wisconsin. It was in force for 53 min. 21 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: Jul 28, 2021, 8:37 PM CDT (01:37 UTC)
Expired: Jul 28, 2021, 9:30 PM CDT
In force: 53 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 70.0 mph

Counties Langlade County, WI, Lincoln County, WI, Marathon County, WI, Shawano County, WI

The radar

The Green Bay radar (KGRB), 109 km from the middle of the area, began a volume at 01:39 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
Jul 28, 8:39 PM CDT	TSTM WND DMG	Merrill, WI	NUMEROUS TREES AND POWER LINES DOWN IN THE CITY.
Jul 28, 8:40 PM CDT	TSTM WND GST 70	Merrill, WI	THERE ARE REPORTS OF NUMEROUS TREES AND POWER LINES DOWN IN THE CITY.
Jul 28, 8:40 PM CDT	TORNADO	4 Se Merrill, WI	NWS DAMAGE SURVEY HAS CONFIRMED A TORNADO STARTING NEAR PINE RIVER WITH WIDESPREAD TREE DAMAGE NEAR THE INTERSECTION OF COUNTY W AND COUNTY P. THE PATH EXTENDS SOUTH INTO MARATHON COUNTY, ENDING JUST EAST OF COUNTY W NEAR HAZELWOOD LANE. PATH LENGTH IS ESTIMAT
Jul 28, 8:40 PM CDT	TORNADO	4 Se Merrill, WI	NWS DAMAGE SURVEY HAS CONFIRMED A TORNADO STARTING NEAR PINE RIVER WITH WIDESPREAD TREE DAMAGE NEAR THE INTERSECTION OF COUNTY W AND COUNTY P. THE PATH EXTENDS SOUTH INTO MARATHON COUNTY, ENDING JUST WEST OF COUNTY W NEAR HAZELWOOD LANE. PATH LENGTH IS ESTIMAT
Jul 28, 8:40 PM CDT	TORNADO	5 Se Merrill, WI	NWS DAMAGE SURVEY HAS CONFIRMED A TORNADO STARTING NEAR PINE RIVER WITH WIDESPREAD TREE DAMAGE NEAR THE INTERSECTION OF COUNTY ROAD P AND VAN ROAD. THE PATH EXTENDS SOUTH INTO MARATHON COUNTY, ENDING NEAR THE INTERSECTION OF SHADY LANE ROAD AND HAZELWOOD LANE.
Jul 28, 8:44 PM CDT	TORNADO	3 Se Pine River, WI	THE TORNADO THAT TOUCHED DOWN IN LINCOLN COUNTY NEAR PINE RIVER CONTINUED INTO FAR NORTHERN MARATHON COUNTY. THE PATH CONTINUED SOUTH INTO MARATHON COUNTY, ENDING JUST EAST OF COUNTY W NEAR HAZELWOOD LANE. THE ENTIRE PATH LENGTH IS ESTIMATED TO BE 2.8 MILES LO
Jul 28, 8:44 PM CDT	TORNADO	3 Se Pine River, WI	THE TORNADO THAT TOUCHED DOWN IN LINCOLN COUNTY NEAR PINE RIVER CONTINUED INTO FAR NORTHERN MARATHON COUNTY. THE PATH CONTINUED SOUTH INTO MARATHON COUNTY, ENDING JUST WEST OF COUNTY W NEAR HAZELWOOD LANE. THE ENTIRE PATH LENGTH IS ESTIMATED TO BE 2.8 MILES LO
Jul 28, 8:44 PM CDT	TORNADO	3 Se Pine River, WI	THE TORNADO THAT TOUCHED DOWN IN LINCOLN COUNTY NEAR PINE RIVER CONTINUED INTO FAR NORTHERN MARATHON COUNTY. THE PATH CONTINUED SOUTH INTO MARATHON COUNTY, ENDING NEAR THE INTERSECTION OF SHADY LANE ROAD AND HAZELWOOD LANE. THE ENTIRE PATH LENGTH IS ESTIMATED
Jul 28, 8:50 PM CDT	TSTM WND DMG	5 Ene Brokaw, WI	NUMEROUS TREES DOWN, AT LEAST 7 PLUS ADDITIONAL TREES FURTHER DOWN THE ROAD
Jul 28, 8:52 PM CDT	TSTM WND DMG	3 E Pine River, WI	MULTIPLE MATURE PINE TREES DOWN, ROOF BLOWN OFF BARN, CORN FIELDS SHREDDED. REPORT VIA SOCIAL MEDIA.
Jul 28, 8:58 PM CDT	TSTM WND GST 60	Schofield, WI
Jul 28, 9:00 PM CDT	TSTM WND DMG	Rib Mountain, WI	MULTIPLE PINE TREES SNAPPED OFF AT 15 FEET. HOUSE DAMAGE.
Jul 28, 9:00 PM CDT	TSTM WND GST 62	Wausau, WI	AT THE AIRPORT.
Jul 28, 9:02 PM CDT	TSTM WND GST 63	Wausau, WI	AT THE AIRPORT.
Jul 28, 9:04 PM CDT	TSTM WND GST 78	Weston, WI	VIA SOCIAL MEDIA FROM WSAW TV-7.
Jul 28, 9:05 PM CDT	TSTM WND DMG	Wausau, WI	NUMEROUS TREES AND POWER LINES DOWN IN THE CITY OF WAUSAU.
Jul 28, 9:12 PM CDT	TSTM WND DMG	1 Nw Hatley, WI	BARN FLATTENED AND SPORADIC TREE DAMAGE. REPORT VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
Jul 28, 9:14 PM CDT	TSTM WND GST 54	Hatley, WI
Jul 28, 9:15 PM CDT	TSTM WND DMG	3 Ene Bowler, WI	SOME TREES DOWN THROUGHOUT THE STOCKBRIDGE-MUNSEE RESERVATION. TIME ESTIMATED BY RADAR.
Jul 28, 9:15 PM CDT	TSTM WND DMG	Hatley, WI	TREES AND POWER LINES DOWN.
Jul 28, 9:20 PM CDT	FUNNEL CLOUD	4 Nw Bevent, WI

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 28, 7:17 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.6 hours before the alert went out and 111 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: 593 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

399 
WUUS53 KGRB 290137
SVRGRB
WIC067-069-073-115-290230-
/O.NEW.KGRB.SV.W.0057.210729T0137Z-210729T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
837 PM CDT Wed Jul 28 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Southern Lincoln County in north central Wisconsin...
  Eastern Marathon County in central Wisconsin...
  Western Langlade County in north central Wisconsin...
  Western Shawano County in northeastern Wisconsin...

* Until 930 PM CDT.

* At 836 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles east of Dutch Corners to near Council
  Grounds State Park, moving southeast at 50 mph.

  HAZARD...70 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Severe thunderstorms will be near...
  Antigo and Rib Mountain around 855 PM CDT.

Other locations in the path of these severe thunderstorms include
Weston, Bevent and Wittenberg.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4540 8924 4504 8898 4495 8898 4494 8891
      4469 8873 4469 8979 4537 9004
TIME...MOT...LOC 0136Z 316DEG 42KT 4519 8941 4517 8979 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Kurimski

5 follow-up statements

642 
WWUS53 KGRB 290144
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
844 PM CDT Wed Jul 28 2021

WIC067-069-073-115-290230-
/O.CON.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Lincoln WI-Marathon WI-Langlade WI-Shawano WI-
844 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHERN LINCOLN...EASTERN MARATHON...WESTERN LANGLADE AND
WESTERN SHAWANO COUNTIES...

At 844 PM CDT, severe thunderstorms were located along a line
extending from 9 miles west of Antigo to near Merrill, moving
southeast at 50 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

These severe storms will be near...
  Wausau and Antigo around 855 PM CDT.

Other locations in the path of these severe thunderstorms include
Weston, Bevent and Wittenberg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Lincoln County. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4540 8924 4504 8898 4495 8898 4494 8891
      4469 8873 4469 8979 4537 9004
TIME...MOT...LOC 0144Z 316DEG 42KT 4514 8934 4512 8972 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Kurimski

544 
WWUS53 KGRB 290155
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
855 PM CDT Wed Jul 28 2021

WIC067-069-073-115-290230-
/O.CON.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Lincoln WI-Marathon WI-Langlade WI-Shawano WI-
855 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHERN LINCOLN...EASTERN MARATHON...WESTERN LANGLADE AND
WESTERN SHAWANO COUNTIES...

At 855 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southwest of Antigo to near Wausau, moving
southeast at 45 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

These severe storms will be near...
  Antigo around 900 PM CDT.

Other locations in the path of these severe thunderstorms include
Bevent and Wittenberg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across Lincoln County. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4540 8924 4504 8898 4495 8898 4494 8891
      4469 8873 4469 8979 4537 9004
TIME...MOT...LOC 0155Z 317DEG 40KT 4507 8925 4499 8958 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Kurimski

567 
WWUS53 KGRB 290202
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
902 PM CDT Wed Jul 28 2021

WIC069-290212-
/O.CAN.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Lincoln WI-
902 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LINCOLN COUNTY IS
CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, north central and northeastern Wisconsin.

LAT...LON 4504 8898 4495 8898 4494 8891 4469 8873
      4469 8979 4505 8992 4512 8940 4525 8913
TIME...MOT...LOC 0202Z 316DEG 42KT 4503 8919 4495 8952 

$$

WIC067-073-115-290230-
/O.CON.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Marathon WI-Langlade WI-Shawano WI-
902 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR EASTERN MARATHON...SOUTHWESTERN LANGLADE AND WESTERN SHAWANO
COUNTIES...

At 902 PM CDT, severe thunderstorms were located along a line
extending from 8 miles south of Antigo to near Weston, moving
southeast at 50 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
  Bevent and Wittenberg.

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.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across the area. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4504 8898 4495 8898 4494 8891 4469 8873
      4469 8979 4505 8992 4512 8940 4525 8913
TIME...MOT...LOC 0202Z 316DEG 42KT 4503 8919 4495 8952 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Kurimski

699 
WWUS53 KGRB 290214
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
914 PM CDT Wed Jul 28 2021

WIC067-290224-
/O.CAN.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Langlade WI-
914 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LANGLADE COUNTY
IS CANCELLED...

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

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, north central and northeastern Wisconsin.

LAT...LON 4496 8975 4502 8938 4503 8899 4495 8898
      4494 8891 4469 8873 4469 8971
TIME...MOT...LOC 0214Z 337DEG 42KT 4489 8919 4481 8952 

$$

WIC073-115-290230-
/O.CON.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Marathon WI-Shawano WI-
914 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR SOUTHEASTERN MARATHON AND WESTERN SHAWANO COUNTIES...

At 914 PM CDT, severe thunderstorms were located along a line
extending from near Wittenberg to near Weston, moving south at 50
mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Wausau, Weston, Rib Mountain, Mosinee, Bevent, Wittenberg,
Rothschild, Schofield, Knowlton and Ringle.

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.

This is a DANGEROUS SITUATION. These storms are producing widespread 
wind damage across the area. SEEK SHELTER NOW inside a sturdy 
structure and stay away from windows.
 
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4496 8975 4502 8938 4503 8899 4495 8898
      4494 8891 4469 8873 4469 8971
TIME...MOT...LOC 0214Z 337DEG 42KT 4489 8919 4481 8952 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...70MPH
 
$$

Kurimski

572 
WWUS53 KGRB 290227
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
927 PM CDT Wed Jul 28 2021

WIC073-115-290236-
/O.EXP.KGRB.SV.W.0057.000000T0000Z-210729T0230Z/
Marathon WI-Shawano WI-
927 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARATHON AND
WESTERN SHAWANO COUNTIES WILL EXPIRE AT 930 PM CDT...

A new Severe Thunderstorm Warning has been issued for southeastern 
Marathon and western Shawano counties until 1015 pm. 

LAT...LON 4496 8975 4502 8938 4503 8899 4495 8898
      4494 8891 4469 8873 4469 8971
TIME...MOT...LOC 0226Z 316DEG 42KT 4479 8906 4471 8939 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 7:04 PM CDT	Special Weather Statement	GRB	Lincoln, Oneida, Vilas	41 min
Jul 28, 7:36 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon	39 min
Jul 28, 7:36 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	39 min
Jul 28, 7:52 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln	53 min
Jul 28, 8:20 PM CDT	Special Weather Statement	GRB	Shawano	40 min
Jul 28, 8:58 PM CDT	Tornado Warning	GRB	Marathon	32 min
Jul 28, 9:05 PM CDT	Areal Flood Advisory	GRB	Langlade, Lincoln, Marathon, Shawano	3 hr
Jul 28, 9:21 PM CDT	Tornado Warning	GRB	Marathon, Portage	24 min
Jul 28, 9:22 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Shawano, Waupaca	53 min
Jul 28, 9:54 PM CDT	Tornado Warning	GRB	Portage, Waupaca	36 min
Jul 28, 10:10 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Portage, Waupaca, Waushara, Winnebago	65 min
Jul 28, 10:18 PM CDT	Severe Thunderstorm Warning	GRB	Wood	43 min
Jul 28, 10:35 PM CDT	Areal Flood Advisory	GRB	Marathon, Outagamie, Portage, Shawano, Waupaca, Waushara and 1 more	3 hr
Jul 28, 11:12 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waupaca, Waushara, Winnebago	45 min
Jul 28, 11:38 PM CDT	Tornado Warning	GRB	Winnebago	16 min
Jul 29, 3:42 AM CDT	Small Craft Advisory	GRB		23 hr

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.