Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Milwaukee, WI

July 6, 20214 counties in Wisconsin

NWS Milwaukee, WI issued this special weather statement at Jul 6, 2021, 5:21 PM CDT for 4 counties in Wisconsin. It was in force for 39 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: Jul 6, 2021, 5:21 PM CDT (22:21 UTC)
Expired: Jul 6, 2021, 6:00 PM CDT
In force: 39 min
Issued by: NWS Milwaukee, WI

Counties Fond du Lac County, WI, Green Lake County, WI, Ozaukee County, WI, Sheboygan County, WI

The radar

The Green Bay radar (KGRB), 82 km from the middle of the area, began a volume at 22:19 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 12:00Z, 10.4 hours before the alert went out and 80 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: 34 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1667 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

772 
WWUS83 KMKX 062221
SPSMKX

Special Weather Statement
National Weather Service MILWAUKEE/SULLIVAN WI
Issued by National Weather Service Chicago/Romeoville
521 PM CDT Tue Jul 6 2021
 
WIZ047-051-052-058>060-062300-
Dodge WI-Green Lake WI-Sheboygan WI-Washington WI-Ozaukee WI-
Fond Du Lac WI-
521 PM CDT Tue Jul 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN OZAUKEE...EASTERN GREEN
LAKE...FOND DU LAC...NORTHERN WASHINGTON...NORTHERN DODGE AND
SHEBOYGAN COUNTIES UNTIL 600 PM CDT...

At 520 PM CDT, Doppler radar was tracking strong thunderstorms along 
a gusty outflow extending from near Brandon to near Campbellsport to 
5 miles southeast of Belgium. Movement was south at 35 mph.

Penny size hail and wind gusts up to 50 mph will be possible with 
these storms. Some of the gusty winds will not be directly with the 
thunderstorms.

Locations impacted include...
Sheboygan, Fond Du Lac, West Bend, Waupun, Port Washington, Plymouth,
Sheboygan Falls, Ripon, Mayville, North Fond Du Lac, Saukville,
Kewaskum, Howards Grove, Oostburg, Lomira, Belgium, Fredonia, Kohler,
Cedar Grove and Campbellsport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

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

LAT...LON 4374 8771 4369 8770 4357 8779 4349 8779
      4337 8788 4356 8901 4365 8901 4398 8892
      4398 8889 4390 8889 4389 8840 4394 8840
      4394 8816 4389 8816 4389 8773 4381 8773
      4377 8770
TIME...MOT...LOC 2220Z 342DEG 30KT 4378 8884 4361 8835 4346 8772 

$$

FRIEDLEIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 2:56 AM CDT	Small Craft Advisory	MKX		31 hr
Jul 6, 3:23 AM CDT	Beach Hazards Statement	MKX	Milwaukee, Ozaukee, Racine, Sheboygan	28 hr
Jul 6, 1:45 PM CDT	Special Weather Statement	MKX	Calumet	60 min
Jul 6, 5:08 PM CDT	Special Marine Warning	MKX		82 min
Jul 6, 5:43 PM CDT	Special Marine Warning	MKX		77 min
Jul 6, 6:07 PM CDT	Special Weather Statement	MKX	Fond du Lac, Green Lake, Marquette, Sheboygan	68 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.