Alert archive / Wisconsin / Flash Flood Watches in 2008

Flash Flood Watch 7, NWS Milwaukee, WI

December 26, 200820 counties in Wisconsin

NWS Milwaukee, WI issued this flash flood watch at Dec 26, 2008, 10:32 AM CST for 20 counties in Wisconsin. It took effect at Dec 27, 2008, 12:00 AM CST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Dec 26, 2008, 10:32 AM CST (16:32 UTC)
In effect from: Dec 27, 2008, 12:00 AM CST
Expired: Dec 27, 2008, 7:08 PM CST
In force: 19 hr
Issued by: NWS Milwaukee, WI
Flood severity: None

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 31 km from the middle of the area, began a volume at 16:30 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, 4.5 hours before the alert went out and 220 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: 509 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 421 m²/s²
0-3 km storm-relative helicity: 574 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 flash 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 flash flood watch went out at Dec 26, 5:12 AM CST, 5 hours 20 minutes earlier.

Area forecast discussion, Dec 26, 5:12 AM CST, 5 hours 20 minutes before

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Hazardous weather outlook, Dec 26, 9:55 AM CST, 37 minutes before

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In the hours before

Local storm report, Dec 26, 6:56 AM CST, 3 hours 36 minutes before

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Local storm report, Dec 26, 7:15 AM CST, 3 hours 17 minutes before

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Local storm report, Dec 26, 8:26 AM CST, 2 hours 6 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
Dec 26, 9:51 AM CST	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 14 more	32 hr
Dec 26, 2:42 PM CST	Gale Watch	MKX		13 hr

Nearby

Flash Flood Watches in Wisconsin, 2008 Every flash 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.