Alert archive / Wisconsin / Flash Flood Watches in 2010

Flash Flood Watch 4, NWS Green Bay, WI

August 13, 201018 counties in Wisconsin

NWS Green Bay, WI issued this flash flood watch at Aug 13, 2010, 3:36 AM CDT for 18 counties in Wisconsin. It took effect at Aug 13, 2010, 5:00 AM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Aug 13, 2010, 3:36 AM CDT (08:36 UTC)
In effect from: Aug 13, 2010, 5:00 AM CDT
Expired: Aug 14, 2010, 1:28 AM CDT
In force: 20 hr
Issued by: NWS Green Bay, WI
Flood severity: None

Counties Brown County, WI, Calumet County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 8.6 hours before the alert went out and 374 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: 3684 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Aug 13, 3:27 AM CDT, 9 minutes earlier.

Area forecast discussion, Aug 13, 3:27 AM CDT, 9 minutes before

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Hazardous weather outlook, Aug 12, 3:42 PM CDT, 11 hours 54 minutes before

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In the hours before

Special weather statement, Aug 13, 12:50 AM CDT, 2 hours 46 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
Aug 13, 7:09 AM CDT	Severe Thunderstorm Warning	GRB	Wood	51 min
Aug 13, 7:55 AM CDT	Areal Flood Advisory	GRB	Marathon, Portage, Wood	118 min
Aug 13, 10:07 AM CDT	Marine Dense Fog Advisory	GRB		5 hr
Aug 13, 3:13 PM CDT	Small Craft Advisory	GRB		4 hr

Nearby

Flash Flood Watches in Wisconsin, 2010 Every flash flood watch in 2010

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.