Alert archive / Wisconsin / Flood Watches in 2008

Flood Watch 4, NWS Milwaukee, WI

September 12, 200811 counties in Wisconsin

NWS Milwaukee, WI issued this flood watch at Sep 12, 2008, 2:43 PM CDT for 11 counties in Wisconsin. It took effect at Sep 13, 2008, 12:00 AM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Sep 12, 2008, 2:43 PM CDT (19:43 UTC)
In effect from: Sep 13, 2008, 12:00 AM CDT
Expired: Sep 13, 2008, 2:38 PM CDT
In force: 15 hr
Issued by: NWS Milwaukee, WI
Flood severity: None

Counties Dane County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Milwaukee County, WI, Racine County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 30 km from the middle of the area, began a volume at 19:48 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

Davenport, (KDVN), launched 12:00Z, 7.7 hours before the alert went out and 190 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: 257 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 527 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Milwaukee, WI wrote its last area forecast discussion before this flood watch went out at Sep 12, 3:55 AM CDT, 10 hours 48 minutes earlier.

Area forecast discussion, Sep 12, 3:55 AM CDT, 10 hours 48 minutes before

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Hazardous weather outlook, Sep 11, 10:04 PM CDT, 16 hours 39 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 6:43 PM CDT	Areal Flood Advisory	MKX	Milwaukee, Racine	63 min

Nearby

Flood Watches in Wisconsin, 2008 Every flood watch in 2008

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.