Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Milwaukee, WI

August 10, 2021Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 10, 2021, 7:24 PM CDT for Sheboygan County, Wisconsin. It was in force for 51 min. 2 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
Aug 10, 2021, 7:24 PM CDT (00:24 UTC)
Expired
Aug 10, 2021, 8:15 PM CDT
In force
51 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 91 km from the middle of the area, began a volume at 00:28 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

TimeReportWhereRemark
Aug 10, 7:30 PM CDTTSTM WND DMG5 Nw Cascade, WILARGE BRANCHES DOWN.
Aug 10, 7:39 PM CDTTSTM WND GST 553 E Adell, WINO DAMAGE IN VICINITY.

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.

IssuedProductOfficeLasted
Aug 10, 3:47 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 321 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2021-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 856 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2021-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
856 J/kg
Mixed-layer CIN
-155 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-1.4

Open this sounding in Storm Lab

The text

As transmitted.

062 
WUUS53 KMKX 110024
SVRMKX
WIC117-110115-
/O.NEW.KMKX.SV.W.0049.210811T0024Z-210811T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
724 PM CDT Tue Aug 10 2021

The National Weather Service in Milwaukee/Sullivan has issued a

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

* Until 815 PM CDT.

* At 724 PM CDT, severe thunderstorms were located along a line
  extending from near St Anna to near Random Lake, moving east at 35
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated. Trees reported down in the Campbellsport 
           Area.

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

* Locations impacted include...
  Sheboygan, Plymouth, Sheboygan Falls, Howards Grove, Oostburg,
  Kohler, Cedar Grove, Random Lake, Elkhart Lake, Greenbush, Cascade,
  Adell, Waldo, Glenbeulah, Haven, Silver Creek, Beechwood,
  Johnsonville, Gibbsville and Batavia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4357 8779 4354 8779 4354 8816 4389 8816
      4389 8774 4381 8773 4380 8772 4379 8773
      4379 8772 4376 8770 4370 8771 4370 8770
      4368 8770
TIME...MOT...LOC 0024Z 259DEG 30KT 4396 8812 4355 8804 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CMILLER
1 follow-up statement
473 
WWUS53 KMKX 110111
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
811 PM CDT Tue Aug 10 2021

WIC117-110120-
/O.EXP.KMKX.SV.W.0049.000000T0000Z-210811T0115Z/
Sheboygan WI-
811 PM CDT Tue Aug 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SHEBOYGAN 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.

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

LAT...LON 4357 8779 4354 8779 4354 8816 4389 8816
      4389 8774 4381 8773 4380 8772 4379 8773
      4379 8772 4376 8770 4370 8771 4370 8770
      4368 8770
TIME...MOT...LOC 0110Z 270DEG 30KT 4403 8763 4362 8756 

$$

CMILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 7:05 PM CDTSpecial Weather StatementMKXJefferson25 min
Aug 10, 7:43 PM CDTSevere Thunderstorm WarningMKXKenosha, Milwaukee, Ozaukee, Racine32 min
Aug 10, 8:07 PM CDTSpecial Marine WarningMKX53 min
Aug 10, 8:16 PM CDTSpecial Marine WarningMKX44 min
Aug 11, 6:44 AM CDTSmall Craft AdvisoryMKX15 hr
Aug 11, 9:58 AM CDTSpecial Weather StatementMKXKenosha, Milwaukee, Racine, Rock, Walworth77 min
Aug 11, 10:06 AM CDTSpecial Marine WarningMKX84 min
Aug 11, 2:46 PM CDTSevere Thunderstorm WarningMKXGreen Lake, Marquette59 min
Aug 11, 4:22 PM CDTSevere Thunderstorm WarningMKXIowa53 min
Aug 11, 5:05 PM CDTSpecial Weather StatementMKXIowa25 min
Aug 11, 5:10 PM CDTSevere Thunderstorm WarningMKXIowa50 min
Aug 11, 5:24 PM CDTSpecial Weather StatementMKXMilwaukee36 min
Aug 11, 5:49 PM CDTSevere Thunderstorm WarningMKXMilwaukee, Waukesha41 min
Aug 11, 5:56 PM CDTSpecial Marine WarningMKX94 min
Aug 11, 5:58 PM CDTSpecial Weather StatementMKXIowa47 min
Aug 11, 6:04 PM CDTTornado WarningMKXIowa41 min
Aug 11, 6:24 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine, Walworth53 min
Aug 11, 6:34 PM CDTTornado WarningMKXDane15 min
Aug 11, 6:48 PM CDTSpecial Marine WarningMKX57 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021Every 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.