Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Milwaukee, WI

August 6, 2021Sheboygan County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 6, 2021, 4:21 PM CDT for Sheboygan County, Wisconsin. It was in force for 24 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
Aug 6, 2021, 4:21 PM CDT (21:21 UTC)
Expired
Aug 6, 2021, 4:45 PM CDT
In force
24 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 81 km from the middle of the area, began a volume at 21:25 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 6, 4:28 PM CDTTSTM WND GST 633 Nnw Sheboygan Falls, WIMEASURED AT THE ASOS AT SHEBOYGAN COUNTY MEMORIAL AIRPORT.
Aug 6, 4:28 PM CDTTSTM WND GST 633 Ssw Howards Grove, WIASOS STATION KSBM SHEBOYGAN-AIRPORT.
Aug 6, 4:28 PM CDTNON-TSTM WND GST 633 Ssw Howards Grove, WIASOS STATION KSBM SHEBOYGAN-AIRPORT.

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, 9.4 hours before the alert went out and 78 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, Green Bay/Straub, WI at 12:00Z on 2021-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 132 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, Green Bay/Straub, WI at 12:00Z on 2021-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 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
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.

373 
WUUS53 KMKX 062121
SVRMKX
WIC117-062145-
/O.NEW.KMKX.SV.W.0022.210806T2121Z-210806T2145Z/

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

The National Weather Service in Milwaukee/Sullivan has issued a

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

* Until 445 PM CDT.

* At 420 PM CDT, a severe thunderstorm was located over Howards
  Grove, moving northeast at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Sheboygan, Sheboygan Falls, Howards Grove, Kohler, Johnsonville and
  Haven.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4376 8770 4373 8789 4386 8797 4389 8787
      4389 8774 4385 8773 4381 8773 4377 8770
TIME...MOT...LOC 2120Z 233DEG 18KT 4382 8780 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

HANSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 3:06 PM CDTSpecial Weather StatementMKXCalumet24 min
Aug 6, 3:44 PM CDTSpecial Weather StatementMKXSheboygan31 min
Aug 6, 3:48 PM CDTSpecial Marine WarningMKX42 min
Aug 6, 4:04 PM CDTSevere Thunderstorm WarningMKXFond du Lac, Sheboygan41 min
Aug 6, 4:09 PM CDTSevere Thunderstorm WarningMKXDodge, Fond du Lac39 min
Aug 6, 4:23 PM CDTSpecial Marine WarningMKX52 min
Aug 6, 4:38 PM CDTSevere Thunderstorm WarningMKXSheboygan52 min
Aug 6, 4:41 PM CDTSpecial Marine WarningMKX64 min
Aug 6, 4:58 PM CDTSevere Thunderstorm WarningMKXDodge, Jefferson32 min
Aug 6, 5:06 PM CDTSevere Thunderstorm WarningMKXOzaukee, Sheboygan24 min
Aug 6, 5:08 PM CDTSpecial Marine WarningMKX52 min
Aug 6, 5:23 PM CDTSpecial Marine WarningMKX111 min
Aug 6, 5:26 PM CDTSpecial Weather StatementMKXDodge, Ozaukee, Washington, Waukesha94 min
Aug 6, 6:22 PM CDTSevere Thunderstorm WarningMKXJefferson38 min
Aug 6, 6:53 PM CDTSpecial Weather StatementMKXJefferson, Milwaukee, Waukesha82 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.