Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Milwaukee, WI

August 27, 2021Calumet County, Wisconsin

NWS Milwaukee, WI issued this special weather statement at Aug 27, 2021, 10:21 PM CDT for Calumet County, Wisconsin. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 27, 2021, 10:21 PM CDT (03:21 UTC)
Expired: Aug 27, 2021, 11:15 PM CDT
In force: 54 min
Issued by: NWS Milwaukee, WI
Hail: 0.25 in
Wind: 40

County Calumet County, WI

The radar

The Green Bay radar (KGRB), 70 km from the middle of the area, began a volume at 03:21 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.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.4 hours before the alert went out and 68 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: 552 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

083 
WWUS83 KMKX 280321
SPSMKX

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1021 PM CDT Fri Aug 27 2021
 
WIZ051-052-280415-
Sheboygan WI-Fond Du Lac WI-
1021 PM CDT Fri Aug 27 2021

...Strong thunderstorms will impact portions of northeastern Fond du
Lac and northern Sheboygan Counties through 1115 PM CDT...

At 1021 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Brillion to near Valders to near Chilton
to 7 miles west of St Anna. Movement was east at 20 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects. Minor damage to outdoor objects is 
         possible.

Locations impacted include...
Sheboygan, Howards Grove, Elkhart Lake, Mount Calvary, St. Cloud,
Calvary, Haven, Marytown, Johnsburg and Johnsonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

&&

LAT...LON 4385 8839 4394 8825 4394 8817 4389 8816
      4389 8774 4381 8773 4377 8770
TIME...MOT...LOC 0321Z 278DEG 16KT 4423 8805 4409 8797 4399 8808 4392
8827

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

$$

KUROSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 2:03 AM CDT	Special Weather Statement	MKX	Columbia	27 min
Aug 28, 2:10 AM CDT	Special Weather Statement	MKX	Sauk	50 min
Aug 28, 3:26 AM CDT	Special Weather Statement	MKX	Iowa	49 min
Aug 28, 2:34 PM CDT	Small Craft Advisory	MKX		25 hr
Aug 28, 3:00 PM CDT	Special Weather Statement	MKX	Kenosha, Milwaukee, Racine, Walworth	60 min
Aug 28, 4:53 PM CDT	Special Weather Statement	MKX	Walworth	52 min
Aug 28, 5:03 PM CDT	Special Weather Statement	MKX	Waukesha	42 min
Aug 28, 5:32 PM CDT	Areal Flood Advisory	MKX	Milwaukee, Ozaukee, Waukesha	118 min

Nearby

Special Weather Statements in Wisconsin, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.