Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 2408

November 12, 200524 counties in Iowa; 8 counties in Minnesota; 9 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Nov 12, 2005, 5:24 PM CST for 24 counties in Iowa; 8 counties in Minnesota; 9 counties in Wisconsin. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Nov 12, 2005, 5:24 PM CST (23:24 UTC)
Expired: Nov 12, 2005, 6:30 PM CST
In force: 66 min
Issued by: the Storm Prediction Center

All 41 counties

Allamakee County, IA, Benton County, IA, Bremer County, IA, Buchanan County, IA, Cedar County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Fayette County, IA, Henry County, IA, Howard County, IA, Jackson County, IA, Johnson County, IA, Jones County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Washington County, IA, Winneshiek County, IA, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Eau Claire County, WI, Grant County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 110 km from the middle of the area, began a volume at 23:24 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 859Nov 12, 5:40 PM CST

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.4 hours before the alert went out and 180 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: 1322 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 12, 12:33 PM CST	Mesoscale Discussion	SPC	Adams, Audubon, Buena Vista, Carroll, Cass, Cherokee and 18 more	87 min
Nov 12, 1:44 PM CST	Tornado Watch	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more	6 hr
Nov 12, 3:35 PM CST	Mesoscale Discussion	SPC	Adair, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 18 more	85 min
Nov 12, 4:40 PM CST	Mesoscale Discussion	SPC	Adair, Appanoose, Audubon, Boone, Buena Vista, Butler and 49 more	65 min
Nov 12, 5:40 PM CST	Tornado Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 14 more	4 hr

Nearby

Mesoscale Discussions in Iowa, 2005 Mesoscale Discussions in Wisconsin, 2005 Mesoscale Discussions in Minnesota, 2005 Every mesoscale discussion in 2005

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.