Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 55, NWS Green Bay, WI

July 28, 2021Oneida County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 28, 2021, 7:36 PM CDT for Oneida County, Wisconsin. It was in force for 39 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: Jul 28, 2021, 7:36 PM CDT (00:36 UTC)
Expired: Jul 28, 2021, 8:15 PM CDT
In force: 39 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Oneida County, WI

The radar

The Green Bay radar (KGRB), 178 km from the middle of the area, began a volume at 00:40 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 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, 0.6 hours before the alert went out and 181 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.

284 
WUUS53 KGRB 290036 RRA
SVRGRB
WIC085-290115-
/O.NEW.KGRB.SV.W.0055.210729T0036Z-210729T0115Z/

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

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Oneida County in north central Wisconsin...

* Until 815 PM CDT.

* At 736 PM CDT, severe thunderstorms were located along a line
  extending from near Squirrel Lake to near Willow Reservoir to near
  Willow Lake, moving southeast at 55 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.

* Severe thunderstorms will be near...
  Willow Reservoir around 740 PM CDT.
  Rainbow Flowage around 745 PM CDT.
  Newbold and Crystal Lake Scout Reservation around 755 PM CDT.

Other locations in the path of these severe thunderstorms include
Rhinelander and Woodboro.

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 4589 9004 4590 8950 4547 8911 4547 8942
      4556 8943 4556 9004
TIME...MOT...LOC 0036Z 317DEG 50KT 4588 8978 4576 8990 4572 9010 

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

Kurimski

5 follow-up statements

499 
WWUS53 KGRB 290043
SVSGRB

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

WIC085-290115-
/O.CON.KGRB.SV.W.0055.000000T0000Z-210729T0115Z/
Oneida WI-
743 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR ONEIDA COUNTY...

At 742 PM CDT, severe thunderstorms were located along a line
extending from 6 miles northwest of Newbold to Willow Reservoir to
near Willow Lake, moving southeast at 60 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.

These severe storms will be near...
  Newbold and Crystal Lake Scout Reservation around 750 PM CDT.
  Rhinelander around 755 PM CDT.

Other locations in the path of these severe thunderstorms include
Woodboro.

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.

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

&&

LAT...LON 4580 8989 4590 8970 4590 8950 4547 8911
      4547 8942 4556 8943 4556 9004 4577 9004
TIME...MOT...LOC 0042Z 316DEG 50KT 4577 8959 4570 8982 4566 9002 

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

Kurimski

507 
WWUS53 KGRB 290050
SVSGRB

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

WIC085-290115-
/O.CON.KGRB.SV.W.0055.000000T0000Z-210729T0115Z/
Oneida WI-
750 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR CENTRAL ONEIDA COUNTY...

At 749 PM CDT, severe thunderstorms were located along a line
extending from Newbold to 7 miles southeast of Willow Reservoir to
near Tripoli, moving southeast at 60 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.

These severe storms will be near...
  Rhinelander, Newbold and Crystal Lake Scout Reservation around 755 
  PM CDT.
  Woodboro around 800 PM CDT.

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.

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

&&

LAT...LON 4573 8984 4584 8957 4590 8950 4547 8911
      4547 8942 4556 8943 4556 9004 4569 9004
TIME...MOT...LOC 0049Z 316DEG 50KT 4571 8951 4564 8974 4560 8994 

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

Kurimski

832 
WWUS53 KGRB 290056
SVSGRB

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

WIC085-290115-
/O.CON.KGRB.SV.W.0055.000000T0000Z-210729T0115Z/
Oneida WI-
756 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR ONEIDA COUNTY...

At 756 PM CDT, severe thunderstorms were located along a line
extending from Rhinelander to 6 miles north of Tomahawk to near
Tripoli, moving southeast at 55 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.

These severe storms will be near...
  Rhinelander, Woodboro and Crystal Lake Scout Reservation around 
  800 PM CDT.

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.

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

&&

LAT...LON 4569 8976 4578 8949 4582 8942 4547 8911
      4547 8942 4556 8943 4556 9004 4565 9004
TIME...MOT...LOC 0056Z 323DEG 49KT 4566 8944 4557 8971 4551 9006 

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

Kurimski

724 
WWUS53 KGRB 290105
SVSGRB

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

WIC085-290115-
/O.CON.KGRB.SV.W.0055.000000T0000Z-210729T0115Z/
Oneida WI-
805 PM CDT Wed Jul 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM CDT
FOR SOUTHEASTERN ONEIDA COUNTY...

At 805 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Rhinelander to near Harrison to 8
miles north of New Wood Wildlife Area, moving southeast at 60 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.

These severe thunderstorms will remain over mainly rural areas of
southeastern Oneida County, including the following locations...
Enterprise, Crescent Corner and Roosevelt.

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.

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

&&

LAT...LON 4556 8978 4565 8945 4572 8934 4547 8911
      4547 8942 4556 8943
TIME...MOT...LOC 0105Z 317DEG 50KT 4557 8933 4548 8960 4542 8995 

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

Kurimski

674 
WWUS53 KGRB 290111
SVSGRB

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

WIC085-290121-
/O.EXP.KGRB.SV.W.0055.000000T0000Z-210729T0115Z/
Oneida WI-
811 PM CDT Wed Jul 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ONEIDA COUNTY
WILL EXPIRE AT 815 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with these
thunderstorms.

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

LAT...LON 4556 8978 4565 8945 4572 8934 4547 8911
      4547 8942 4556 8943
TIME...MOT...LOC 0110Z 317DEG 50KT 4552 8926 4543 8953 4537 8988 

$$

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, 7:52 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, 8:37 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon, Shawano	53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.