Alert archive / Wisconsin / Areal Flood Warnings in 2019

Areal Flood Warning 13, NWS Green Bay, WI

September 12, 2019Brown County, Wisconsin

NWS Green Bay, WI issued this areal flood warning at Sep 12, 2019, 9:55 PM CDT for Brown County, Wisconsin. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 12, 2019, 9:55 PM CDT (02:55 UTC)
Expired: Sep 13, 2019, 3:19 AM CDT
In force: 5 hr
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Flood severity: None

County Brown County, WI

The radar

The Green Bay radar (KGRB), 10 km from the middle of the area, began a volume at 02:54 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 00:00Z, 2.9 hours before the alert went out and 9 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: 600 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 466 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Sep 12, 3:03 PM CDT, 6 hours 52 minutes earlier.

Area forecast discussion, Sep 12, 3:03 PM CDT, 6 hours 52 minutes before

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Hazardous weather outlook, Sep 12, 1:42 PM CDT, 8 hours 13 minutes before

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In the hours before

Special weather statement, Sep 12, 6:31 PM CDT, 3 hours 24 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 12, 7:56 PM CDT	Special Weather Statement	GRB	Lincoln, Oneida, Portage, Vilas	64 min
Sep 13, 9:40 AM CDT	River Flood Warning	GRB	Wood	24 hr
Sep 13, 5:36 PM CDT	River Flood Warning	GRB	Oconto	11 hr

Nearby

Areal Flood Warnings in Wisconsin, 2019 Every areal flood warning in 2019

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.