Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS Green Bay, WI

September 20, 2017Florence County, Forest County, Langlade County, Wisconsin

NWS Green Bay, WI issued this special weather statement at Sep 20, 2017, 8:30 AM CDT for Florence County, Forest County, Langlade County, Wisconsin. It was in force for 45 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, 2017, 8:30 AM CDT (13:30 UTC)
Expired: Sep 20, 2017, 9:15 AM CDT
In force: 45 min
Issued by: NWS Green Bay, WI

Counties Florence County, WI, Forest County, WI, Langlade County, WI

The radar

The Green Bay radar (KGRB), 109 km from the middle of the area, began a volume at 13:34 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, 1.5 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Green Bay, WI wrote its last area forecast discussion before this special weather statement went out at Sep 20, 5:29 AM CDT, 3 hours 1 minute earlier.

Area forecast discussion, Sep 20, 5:29 AM CDT, 3 hours 1 minute before

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Hazardous weather outlook, Sep 20, 4:21 AM CDT, 4 hours 9 minutes before

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In the hours before

Special weather statement, Sep 20, 6:05 AM CDT, 2 hours 25 minutes before

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Special weather statement, Sep 20, 7:28 AM CDT, 1 hour 2 minutes before

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Special weather statement, Sep 20, 8:30 AM CDT, 0 minutes before

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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, 4:09 AM CDT	Beach Hazards Statement	GRB	Door, Kewaunee, Manitowoc	18 hr
Sep 20, 6:05 AM CDT	Special Weather Statement	GRB	Lincoln, Marathon, Oneida, Vilas, Wood	85 min
Sep 20, 7:28 AM CDT	Special Weather Statement	GRB	Langlade, Lincoln, Marathon, Oneida, Portage, Vilas and 1 more	47 min
Sep 20, 9:44 AM CDT	Special Weather Statement	GRB	Marinette	46 min
Sep 20, 9:53 AM CDT	Special Weather Statement	GRB	Menominee, Oconto, Shawano	67 min
Sep 20, 4:11 PM CDT	Special Weather Statement	GRB	Portage	49 min
Sep 20, 4:25 PM CDT	Special Weather Statement	GRB	Wood	50 min
Sep 20, 4:58 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	47 min
Sep 20, 5:27 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waupaca	48 min
Sep 20, 6:19 PM CDT	Special Weather Statement	GRB	Waupaca	56 min
Sep 20, 6:36 PM CDT	Areal Flood Advisory	GRB	Portage, Waupaca, Waushara, Wood	4 hr

Nearby

Special Weather Statements in Wisconsin, 2017 Every special weather statement in 2017

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.