Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Green Bay, WI

May 25, 2021Marathon County, Portage County, Wood County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at May 25, 2021, 6:18 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 39 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: May 25, 2021, 6:18 PM CDT (23:18 UTC)
Expired: May 25, 2021, 6:57 PM CDT
In force: 39 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Marathon County, WI, Portage County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 129 km from the middle of the area, began a volume at 23:18 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
May 25, 6:25 PM CDT	TSTM WND DMG	3 Nw Rib Mountain State, WI
May 25, 6:31 PM CDT	TSTM WND DMG	Mosinee, WI	TREES AND POWERLINES DOWN IN CITY. VIA SOCIAL MEDIA.
May 25, 6:31 PM CDT	TSTM WND GST 55	Wausau, WI	TREES AND POWERLINES DOWN IN THE CITY.
May 25, 6:34 PM CDT	TSTM WND DMG	Evergreen, WI	A FEW TREES UPROOTED AND A COUPLE POWERLINES DOWN. VIA SOCIAL MEDIA.
May 25, 6:34 PM CDT	TSTM WND GST 49	Mosinee, WI
May 25, 6:37 PM CDT	TSTM WND GST 43	Wisconsin Rapids, WI
May 25, 6:52 PM CDT	TSTM WND DMG	Custer, WI	A FEW TREES DOWN.

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
May 25, 2:53 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.3 hours before the alert went out and 145 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: 96 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

599 
WUUS53 KGRB 252318
SVRGRB
WIC073-097-141-260015-
/O.NEW.KGRB.SV.W.0011.210525T2318Z-210526T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
618 PM CDT Tue May 25 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Wood County in central Wisconsin...
  Portage County in central Wisconsin...
  Southeastern Marathon County in central Wisconsin...

* Until 715 PM CDT.

* At 618 PM CDT, severe thunderstorms were located along a line
  extending from 10 miles west of Rib Mountain to 12 miles east of
  Marshfield to near Pittsville to 12 miles east of Millston, moving
  east at 50 mph.

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

  SOURCE...Trained weather spotters.

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

* Severe thunderstorms will be near...
  Wausau around 625 PM CDT.
  Rib Mountain and Mosinee around 630 PM CDT.
  Weston around 635 PM CDT.

Other locations in the path of these severe thunderstorms include
Stevens Point, Wisconsin Rapids, Lake Wazeecha, Bevent, Whiting and
Amherst.

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 4440 9032 4459 9005 4498 9002 4498 8922
      4424 8923 4425 9032
TIME...MOT...LOC 2318Z 268DEG 43KT 4486 8988 4460 8993 4439 9022 4425
9041

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

Kurimski

3 follow-up statements

086 
WWUS53 KGRB 252333
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
633 PM CDT Tue May 25 2021

WIC073-097-141-260015-
/O.CON.KGRB.SV.W.0011.000000T0000Z-210526T0015Z/
Wood WI-Portage WI-Marathon WI-
633 PM CDT Tue May 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR WOOD...PORTAGE AND SOUTHEASTERN MARATHON COUNTIES...

At 633 PM CDT, severe thunderstorms were located along a line
extending from near Rib Mountain to 9 miles south of Mosinee to 6
miles northwest of Wisconsin Rapids to 6 miles west of Babcock,
moving east at 60 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
  Weston, Bevent, Stevens Point, Whiting and Amherst.

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 4451 9017 4462 8993 4498 8990 4498 8922
      4424 8923 4425 9032 4440 9032
TIME...MOT...LOC 2333Z 258DEG 52KT 4491 8964 4465 8965 4444 8994 4429
9027

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

Kurimski

836 
WWUS53 KGRB 252345
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
645 PM CDT Tue May 25 2021

WIC141-252354-
/O.CAN.KGRB.SV.W.0011.000000T0000Z-210526T0015Z/
Wood WI-
645 PM CDT Tue May 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR WOOD 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 1000 PM CDT for
central and northeastern Wisconsin.

LAT...LON 4425 8973 4459 8972 4467 8977 4479 8967
      4498 8969 4498 8922 4424 8923
TIME...MOT...LOC 2344Z 256DEG 51KT 4495 8941 4469 8943 4448 8972 

$$

WIC073-097-260015-
/O.CON.KGRB.SV.W.0011.000000T0000Z-210526T0015Z/
Portage WI-Marathon WI-
645 PM CDT Tue May 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR PORTAGE AND SOUTHEASTERN MARATHON COUNTIES...

At 644 PM CDT, severe thunderstorms were located along a line
extending from 7 miles northeast of Weston to near Bevent to 7 miles
north of Lake Wazeecha, moving east at 60 mph.

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

SOURCE...Radar indicated.

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

These severe storms will be near...
  Bevent around 650 PM CDT.

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

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 4425 8973 4459 8972 4467 8977 4479 8967
      4498 8969 4498 8922 4424 8923
TIME...MOT...LOC 2344Z 256DEG 51KT 4495 8941 4469 8943 4448 8972 

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

Kurimski

058 
WWUS53 KGRB 252357
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
657 PM CDT Tue May 25 2021

WIC073-097-260007-
/O.CAN.KGRB.SV.W.0011.000000T0000Z-210526T0015Z/
Portage WI-Marathon WI-
657 PM CDT Tue May 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR PORTAGE AND SOUTHEASTERN
MARATHON 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 heavy rain are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
central and northeastern Wisconsin.

LAT...LON 4425 8973 4459 8972 4467 8977 4479 8967
      4498 8969 4498 8922 4424 8923
TIME...MOT...LOC 2355Z 268DEG 43KT 4495 8921 4469 8923 4449 8952 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:00 PM CDT	Special Weather Statement	GRB	Lincoln	45 min
May 24, 7:24 PM CDT	Special Weather Statement	GRB	Lincoln	21 min
May 24, 8:50 PM CDT	Small Craft Advisory	GRB		31 hr
May 25, 9:47 AM CDT	Special Weather Statement	GRB	Forest, Langlade, Oneida	58 min
May 25, 4:01 PM CDT	Special Weather Statement	GRB	Lincoln, Oneida, Vilas	89 min
May 25, 4:22 PM CDT	Special Weather Statement	GRB	Winnebago	23 min
May 25, 4:53 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	67 min
May 25, 5:34 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Wood	56 min
May 25, 5:57 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Oneida	63 min
May 25, 6:29 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Langlade, Oconto	36 min
May 25, 6:54 PM CDT	Special Weather Statement	GRB	Menominee, Oconto, Portage, Shawano, Waupaca	66 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.