Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Green Bay, WI

July 26, 20214 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 26, 2021, 11:33 PM CDT for 4 counties in Wisconsin. It was in force for 57 min. 7 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 26, 2021, 11:33 PM CDT (04:33 UTC)
Expired: Jul 27, 2021, 12:30 AM CDT
In force: 57 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Marinette County, WI, Menominee County, WI, Oconto County, WI, Shawano County, WI

The radar

The Green Bay radar (KGRB), 64 km from the middle of the area, began a volume at 04:36 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 27, 12:01 AM CDT	TSTM WND DMG	Keshena, WI	TREES AND POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jul 27, 12:07 AM CDT	TSTM WND DMG	Shawano, WI	TREES AND POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jul 27, 12:07 AM CDT	TSTM WND GST 77	5 Nne Breed, WI	MOUNTAIN RAWS FIRE OBSERVATION.
Jul 27, 12:15 AM CDT	TSTM WND DMG	1 Nnw Cecil, WI	MPING REPORT.
Jul 27, 12:20 AM CDT	TSTM WND DMG	Oconto Falls, WI	SEVERAL TREES DOWN ON OAKLAND STREET. PHOTOS SENT VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
Jul 27, 12:30 AM CDT	TSTM WND GST 60	Stiles, WI	REPORT VIA SOCIAL MEDIA. TREES DOWN. ESTIMATED GUSTS TO 60 MPH.
Jul 27, 12:35 AM CDT	TSTM WND DMG	Oconto Falls, WI	SEVERAL TREES DOWN ON OAKLAND STREET. PHOTOS SENT VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.6 hours before the alert went out and 66 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: 591 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2073 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 109 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

As transmitted.

468 
WUUS53 KGRB 270433
SVRGRB
WIC075-078-083-115-270530-
/O.NEW.KGRB.SV.W.0049.210727T0433Z-210727T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1133 PM CDT Mon Jul 26 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Marinette County in northeastern Wisconsin...
  Menominee County in northeastern Wisconsin...
  Oconto County in northeastern Wisconsin...
  Shawano County in northeastern Wisconsin...

* Until 1230 AM CDT.

* At 1132 PM CDT, severe thunderstorms were located along a line
  extending from 9 miles north of Carter to 8 miles southwest of
  Antigo to near Rib Mountain, moving east at 55 mph.

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

  SOURCE...Law enforcement.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Neopit, Wittenberg, Keshena, Shawano, Wausaukee, Legend Lake, 
  Gillett and Pulaski.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across northern Wisconsin. SEEK SHELTER NOW inside a
sturdy structure and stay away from windows!
 
&&

LAT...LON 4462 8861 4468 8861 4468 8922 4503 8922
      4503 8899 4512 8898 4512 8864 4538 8868
      4538 8843 4555 8842 4544 8786 4535 8789
      4534 8785 4537 8766 4520 8774 4510 8760
      4512 8754 4468 8798 4468 8825 4459 8825
TIME...MOT...LOC 0432Z 289DEG 46KT 4552 8863 4503 8922 4495 8977 

HAIL...0.75IN
WIND...60MPH
 
$$

Kurimski

3 follow-up statements

745 
WWUS53 KGRB 270449
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1149 PM CDT Mon Jul 26 2021

WIC075-078-083-115-270530-
/O.CON.KGRB.SV.W.0049.000000T0000Z-210727T0530Z/
Marinette WI-Menominee WI-Oconto WI-Shawano WI-
1149 PM CDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR MARINETTE...MENOMINEE...OCONTO AND SHAWANO COUNTIES...

At 1148 PM CDT, severe thunderstorms were located along a line
extending from 7 miles north of McCaslin Mountain Natural Area to
near Wittenberg to near Mosinee, moving southeast at 35 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Law enforcement. At 1132 pm 58 mph winds were measured at 
         the Wausau airport.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
  Wausaukee, Crivitz and Navarino Wildlife Area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across northern Wisconsin. 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 4462 8861 4468 8861 4468 8922 4503 8922
      4503 8899 4512 8898 4512 8864 4538 8868
      4538 8843 4555 8842 4544 8786 4535 8789
      4534 8785 4537 8766 4520 8774 4510 8760
      4512 8754 4468 8798 4468 8825 4459 8825
TIME...MOT...LOC 0448Z 301DEG 31KT 4549 8843 4483 8912 4484 8965 

HAIL...0.75IN
WIND...70MPH
 
$$

Kurimski

705 
WWUS53 KGRB 270515
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1215 AM CDT Tue Jul 27 2021

WIC075-078-083-115-270530-
/O.CON.KGRB.SV.W.0049.000000T0000Z-210727T0530Z/
Marinette WI-Menominee WI-Oconto WI-Shawano WI-
1215 AM CDT Tue Jul 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR MARINETTE...MENOMINEE...OCONTO AND SHAWANO COUNTIES...

At 1214 AM CDT, severe thunderstorms were located along a line
extending from near Crivitz to near Navarino Wildlife Area, moving
east at 60 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Law enforcement.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Crivitz around 1220 AM CDT.
  Pulaski around 1230 AM CDT.
  Marinette around 1235 AM CDT.
  Menominee around 1240 AM CDT.

Other locations impacted by these severe thunderstorms include
College Of Menominee Nation, Breed, Hayes, Tigerton, High Falls
Reservoir, Hickory Corners, Whitcomb, Mcclintock County Park, Caldron
Falls Reservoir and Frazer Corners.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across northern Wisconsin. 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 4462 8861 4468 8861 4468 8922 4489 8922
      4494 8893 4509 8862 4523 8851 4538 8843
      4555 8842 4544 8786 4535 8789 4534 8785
      4537 8766 4520 8774 4511 8766 4510 8759
      4512 8754 4468 8798 4468 8825 4459 8825
TIME...MOT...LOC 0514Z 280DEG 52KT 4525 8809 4468 8854 

HAIL...0.75IN
WIND...70MPH
 
$$

Kurimski

629 
WWUS53 KGRB 270526
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1226 AM CDT Tue Jul 27 2021

WIC075-078-083-115-270535-
/O.EXP.KGRB.SV.W.0049.000000T0000Z-210727T0530Z/
Marinette WI-Menominee WI-Oconto WI-Shawano WI-
1226 AM CDT Tue Jul 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR MARINETTE...MENOMINEE...OCONTO
AND SHAWANO COUNTIES WILL EXPIRE AT 1230 AM CDT...

A new Severe Thunderstorm Warning has been issued for southern 
Marinette, Oconto, and eastern Shawano counties until 130 am.


LAT...LON 4462 8861 4468 8861 4468 8922 4489 8922
      4494 8893 4509 8862 4523 8851 4538 8843
      4555 8842 4544 8786 4535 8789 4534 8785
      4537 8766 4520 8774 4511 8766 4510 8759
      4512 8754 4468 8798 4468 8825 4459 8825
TIME...MOT...LOC 0525Z 289DEG 46KT 4521 8792 4464 8837 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 8:26 PM CDT	Special Weather Statement	GRB	Door	49 min
Jul 26, 8:33 PM CDT	Special Marine Warning	GRB		36 min
Jul 26, 9:43 PM CDT	Special Weather Statement	GRB	Vilas	62 min
Jul 26, 10:30 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Vilas	50 min
Jul 26, 10:37 PM CDT	Special Weather Statement	GRB	Langlade, Lincoln	53 min
Jul 26, 10:45 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Oneida	45 min
Jul 26, 11:06 PM CDT	Severe Thunderstorm Warning	GRB	Florence	54 min
Jul 26, 11:11 PM CDT	Severe Thunderstorm Warning	GRB	Florence, Forest, Langlade, Lincoln, Marathon, Oneida	49 min
Jul 26, 11:39 PM CDT	Special Weather Statement	GRB	Marinette	36 min
Jul 26, 11:58 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Outagamie, Portage, Waupaca	62 min
Jul 27, 12:16 AM CDT	Special Marine Warning	GRB		89 min
Jul 27, 12:24 AM CDT	Severe Thunderstorm Warning	GRB	Brown, Marinette, Oconto, Shawano	66 min
Jul 27, 12:37 AM CDT	Special Marine Warning	GRB		83 min
Jul 27, 12:51 AM CDT	Severe Thunderstorm Warning	GRB	Door, Kewaunee	54 min
Jul 27, 12:52 AM CDT	Special Weather Statement	GRB	Calumet, Winnebago	38 min
Jul 27, 12:55 AM CDT	Special Weather Statement	GRB	Manitowoc	35 min
Jul 27, 1:18 AM CDT	Special Weather Statement	GRB	Oneida	42 min
Jul 27, 1:28 AM CDT	Severe Thunderstorm Warning	GRB	Oneida	32 min
Jul 27, 1:42 AM CDT	Special Weather Statement	GRB	Manitowoc	48 min
Jul 27, 1:53 AM CDT	Special Weather Statement	GRB	Lincoln	52 min
Jul 27, 2:30 AM CDT	Special Weather Statement	GRB	Langlade	45 min
Jul 27, 2:41 AM CDT	Special Weather Statement	GRB	Langlade, Lincoln, Marathon, Menominee, Shawano	49 min
Jul 27, 3:20 AM CDT	Special Weather Statement	GRB	Brown, Marathon, Menominee, Outagamie, Portage, Shawano and 2 more	40 min
Jul 27, 3:51 AM CDT	Special Weather Statement	GRB	Brown, Calumet, Kewaunee, Manitowoc, Marathon, Outagamie and 6 more	69 min
Jul 27, 6:16 AM CDT	Special Weather Statement	GRB	Portage, Wood	44 min
Jul 27, 6:58 AM CDT	Special Weather Statement	GRB	Portage, Wood	47 min
Jul 27, 7:27 AM CDT	Special Weather Statement	GRB	Waushara	63 min
Jul 27, 8:33 AM CDT	Special Weather Statement	GRB	Calumet, Manitowoc, Portage, Waushara, Winnebago, Wood	57 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.