Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Milwaukee, WI

August 6, 2021Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 6, 2021, 4:38 PM CDT for Sheboygan County, Wisconsin. It was in force for 52 min. 1 report 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: Aug 6, 2021, 4:38 PM CDT (21:38 UTC)
Expired: Aug 6, 2021, 5:30 PM CDT
In force: 52 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 92 km from the middle of the area, began a volume at 21:43 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
Aug 6, 4:58 PM CDT	TSTM WND DMG	2 N Kohler, WI	3 INCH TREE LIMBS REPORTED BROKEN. RECEIVED VIA MPING.

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 12:00Z, 9.6 hours before the alert went out and 90 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: 132 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

229 
WUUS53 KMKX 062138
SVRMKX
WIC117-062230-
/O.NEW.KMKX.SV.W.0023.210806T2138Z-210806T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
438 PM CDT Fri Aug 6 2021

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Southeastern Sheboygan County in east central Wisconsin...

* Until 530 PM CDT.

* At 438 PM CDT, a severe thunderstorm was located near Sheboygan
  Falls, moving east at 15 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.

* Locations impacted include...
  Sheboygan, Plymouth, Sheboygan Falls, Oostburg, Kohler, Adell,
  Waldo, Gibbsville and Hingham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4368 8770 4358 8778 4362 8799 4376 8797
      4378 8771 4377 8770 4376 8770 4372 8771
      4370 8770
TIME...MOT...LOC 2138Z 271DEG 14KT 4370 8789 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HANSEN

2 follow-up statements

371 
WWUS53 KMKX 062153
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
453 PM CDT Fri Aug 6 2021

WIC117-062230-
/O.CON.KMKX.SV.W.0023.000000T0000Z-210806T2230Z/
Sheboygan WI-
453 PM CDT Fri Aug 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHEASTERN SHEBOYGAN COUNTY...

At 453 PM CDT, a severe thunderstorm was located over Sheboygan
Falls, moving east at 15 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.

Locations impacted include...
Sheboygan, Plymouth, Sheboygan Falls, Oostburg, Kohler, Adell, Waldo,
Gibbsville and Hingham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4368 8770 4358 8778 4362 8799 4376 8797
      4378 8771 4377 8770 4376 8770 4372 8771
      4370 8770
TIME...MOT...LOC 2153Z 271DEG 14KT 4370 8781 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HANSEN

694 
WWUS53 KMKX 062230
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
530 PM CDT Fri Aug 6 2021

WIC117-062240-
/O.EXP.KMKX.SV.W.0023.000000T0000Z-210806T2230Z/
Sheboygan WI-
530 PM CDT Fri Aug 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SHEBOYGAN COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

LAT...LON 4368 8770 4358 8778 4362 8799 4376 8797
      4378 8771 4377 8770 4376 8770 4372 8771
      4370 8770
TIME...MOT...LOC 2230Z 271DEG 14KT 4370 8762 

$$

HANSEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 3:06 PM CDT	Special Weather Statement	MKX	Calumet	24 min
Aug 6, 3:44 PM CDT	Special Weather Statement	MKX	Sheboygan	31 min
Aug 6, 3:48 PM CDT	Special Marine Warning	MKX		42 min
Aug 6, 4:04 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac, Sheboygan	41 min
Aug 6, 4:09 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Fond du Lac	39 min
Aug 6, 4:21 PM CDT	Severe Thunderstorm Warning	MKX	Sheboygan	24 min
Aug 6, 4:23 PM CDT	Special Marine Warning	MKX		52 min
Aug 6, 4:41 PM CDT	Special Marine Warning	MKX		64 min
Aug 6, 4:58 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson	32 min
Aug 6, 5:06 PM CDT	Severe Thunderstorm Warning	MKX	Ozaukee, Sheboygan	24 min
Aug 6, 5:08 PM CDT	Special Marine Warning	MKX		52 min
Aug 6, 5:23 PM CDT	Special Marine Warning	MKX		111 min
Aug 6, 5:26 PM CDT	Special Weather Statement	MKX	Dodge, Ozaukee, Washington, Waukesha	94 min
Aug 6, 6:22 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson	38 min
Aug 6, 6:53 PM CDT	Special Weather Statement	MKX	Jefferson, Milwaukee, Waukesha	82 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.