Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Green Bay, WI

August 6, 2021Calumet County, Wisconsin

NWS Green Bay, WI issued this special weather statement at Aug 6, 2021, 3:53 PM CDT for Calumet County, Wisconsin. It was in force for 37 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 6, 2021, 3:53 PM CDT (20:53 UTC)
Expired
Aug 6, 2021, 4:30 PM CDT
In force
37 min
Issued by
NWS Green Bay, WI
Hail
0.25 in
Wind
30

County Calumet County, WI

The radar

The Green Bay radar (KGRB), 61 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 59 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.

678 
WWUS83 KGRB 062053
SPSGRB

Special Weather Statement
National Weather Service Green Bay WI
353 PM CDT Fri Aug 6 2021
 
WIZ049-050-062130-
Calumet WI-Manitowoc WI-
353 PM CDT Fri Aug 6 2021

...A cluster of strong thunderstorm will impact portions of 
southeastern Calumet and southwestern Manitowoc Counties through 430 
PM CDT...

At 351 PM CDT, Doppler radar was tracking a cluster of strong 
thunderstorms near Camp Rokilio Scout Camp, or 9 miles north of 
Howards Grove, and also near Kiel moving east at 10 mph.

HAZARD...Winds in excess of 30 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...
  Cleveland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4394 8817 4408 8758 4406 8760 4390 8769
      4389 8816
TIME...MOT...LOC 2051Z 270DEG 11KT 4396 8787 

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...30 MPH

$$

Cooley

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 7:07 AM CDTSpecial Weather StatementGRBWaushara53 min
Aug 6, 7:36 AM CDTSpecial Weather StatementGRBOutagamie, Winnebago39 min
Aug 6, 8:10 AM CDTSpecial Weather StatementGRBCalumet50 min

Nearby

Special Weather Statements in Wisconsin, 2021Every 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.