Alert archive / Wisconsin / Special Weather Statements in 2021

Special Weather Statement, NWS Green Bay, WI

September 20, 20215 counties in Wisconsin

NWS Green Bay, WI issued this special weather statement at Sep 20, 2021, 8:06 PM CDT for 5 counties in 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: Sep 20, 2021, 8:06 PM CDT (01:06 UTC)
Expired: Sep 20, 2021, 9:00 PM CDT
In force: 54 min
Issued by: NWS Green Bay, WI
Hail: 0.00 in
Wind: 30

Counties Forest County, WI, Langlade County, WI, Lincoln County, WI, Oneida County, WI, Vilas County, WI

The radar

The Green Bay radar (KGRB), 157 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 159 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: 429 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 735 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 7:02 PM CDT	Special Weather Statement	GRB	Marathon, Portage, Wood	58 min
Sep 20, 7:09 PM CDT	Special Weather Statement	GRB	Lincoln, Oneida, Vilas	66 min
Sep 20, 7:34 PM CDT	Special Weather Statement	GRB	Marathon, Portage, Waushara, Wood	56 min
Sep 20, 7:56 PM CDT	Special Weather Statement	GRB	Marathon, Portage, Waushara, Wood	64 min
Sep 20, 8:46 PM CDT	Special Weather Statement	GRB	Brown, Menominee, Oconto, Outagamie, Portage, Shawano and 3 more	74 min
Sep 20, 9:57 PM CDT	Special Weather Statement	GRB	Winnebago	48 min
Sep 20, 10:45 PM CDT	Special Marine Warning	GRB		37 min
Sep 20, 10:54 PM CDT	Special Weather Statement	GRB	Brown, Manitowoc	51 min
Sep 20, 11:16 PM CDT	Special Marine Warning	GRB		72 min
Sep 21, 2:14 PM CDT	Beach Hazards Statement	GRB	Door, Kewaunee, Manitowoc	55 hr

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.