Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 45, NWS Green Bay, WI

July 26, 2021Forest County, Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 26, 2021, 10:30 PM CDT for Forest County, Vilas County, Wisconsin. It was in force for 50 min. 3 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, 10:30 PM CDT (03:30 UTC)
Expired: Jul 26, 2021, 11:20 PM CDT
In force: 50 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Forest County, WI, Vilas County, WI

The radar

The Marquette radar (KMQT), 125 km from the middle of the area, began a volume at 03:31 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 26, 10:36 PM CDT	TSTM WND DMG	Conover, WI	TREES AND POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jul 26, 10:42 PM CDT	TSTM WND DMG	3 Ne Eagle River, WI	TREES AND POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jul 26, 10:56 PM CDT	TSTM WND DMG	Alvin, WI	TREES AND POWER LINES DOWN. 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, 3.5 hours before the alert went out and 182 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.

944 
WUUS53 KGRB 270330
SVRGRB
WIC041-125-270430-
/O.NEW.KGRB.SV.W.0045.210727T0330Z-210727T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1030 PM CDT Mon Jul 26 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Northwestern Forest County in northeastern Wisconsin...
  Southeastern Vilas County in north central Wisconsin...

* Until 1130 PM CDT.

* At 1030 PM CDT, a severe thunderstorm was located 7 miles west of
  Phelps, or 10 miles north of Eagle River, moving east at 25 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.

* This severe thunderstorm will be near...
  Phelps around 1050 PM CDT.

Other locations in the path of this severe thunderstorm include
Kentuck Lake Campground.

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 4614 8909 4602 8882 4603 8878 4602 8878
      4603 8874 4601 8868 4577 8868 4587 8905
      4589 8905 4590 8921 4595 8945 4618 8930
TIME...MOT...LOC 0330Z 287DEG 23KT 4608 8924 

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

Bersch

2 follow-up statements

836 
WWUS53 KGRB 270349
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1049 PM CDT Mon Jul 26 2021

WIC041-125-270430-
/O.CON.KGRB.SV.W.0045.000000T0000Z-210727T0430Z/
Forest WI-Vilas WI-
1049 PM CDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR NORTHWESTERN FOREST AND SOUTHEASTERN VILAS COUNTIES...

At 1048 PM CDT, a severe thunderstorm was located over Kentuck Lake
Campground, or 15 miles northeast of Eagle River, moving east at 30
mph.

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

SOURCE...Public. Damage to trees and power lines has been reported.

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

This severe thunderstorm will remain over mainly rural areas of
northwestern Forest and southeastern Vilas Counties, including the
following locations... Luna-White Deer Campground, Franklin Lake
Campground, Popple River Headwaters Natural Area, Bastile Lake
Natural Area, Anvil Lake Campground, Alvin, Windsor Dam Campground
and Stevens Lake Campground.

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 4601 8881 4602 8877 4601 8877 4602 8873
      4600 8868 4577 8868 4587 8904 4588 8904
      4588 8905 4589 8905 4590 8916 4591 8924
      4613 8909 4613 8908
TIME...MOT...LOC 0348Z 286DEG 28KT 4602 8897 

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

Bersch

275 
WWUS53 KGRB 270420
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1120 PM CDT Mon Jul 26 2021

WIC041-125-270429-
/O.CAN.KGRB.SV.W.0045.000000T0000Z-210727T0430Z/
Forest WI-Vilas WI-
1120 PM CDT Mon Jul 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FOREST AND
SOUTHEASTERN VILAS COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 4601 8881 4602 8877 4601 8877 4602 8873
      4600 8868 4577 8868 4587 8904 4588 8904
      4588 8905 4589 8905 4590 8916 4591 8924
      4613 8909 4613 8908
TIME...MOT...LOC 0417Z 287DEG 23KT 4596 8869 

$$

Bersch

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, 10:37 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, 11:33 PM CDT	Severe Thunderstorm Warning	GRB	Marinette, Menominee, Oconto, Shawano	57 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.