Alert archive / Wisconsin / Mesoscale Discussions in 2004

Mesoscale Discussion 1231

June 12, 20046 counties in Iowa; 12 counties in Minnesota; 21 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2004, 7:00 PM CDT for 6 counties in Iowa; 12 counties in Minnesota; 21 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2004, 7:00 PM CDT (00:00 UTC)
Expired: Jun 12, 2004, 9:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 39 counties

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Richland County, WI, Saint Croix County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 21 km from the middle of the area, began a volume at 00:00 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 00:00Z, 0.0 hours before the alert went out and 238 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: 1698 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1531 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
Jun 12, 7:09 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Boone, Cedar, Clarke, Clinton and 32 more	96 min
Jun 13, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Cass, Fremont, Mills, Montgomery, Page and 2 more	5 hr
Jun 13, 6:54 PM CDT	Mesoscale Discussion	SPC	Adams, Fremont, Mills, Montgomery, Page, Pottawattamie and 1 more	66 min
Jun 12, 9:10 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 25 more	2 hr
Jun 12, 9:33 PM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chippewa, Chisago, Dakota and 25 more	117 min
Jun 13, 3:29 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Chisago, Isanti, Kanabec, Mille Lacs and 2 more	2 hr
Jun 13, 5:34 PM CDT	Mesoscale Discussion	SPC	Big Stone, Stevens, Traverse	116 min
Jun 13, 7:29 AM CDT	Mesoscale Discussion	SPC	Adams, Clark, Florence, Forest, Jackson, Juneau and 19 more	91 min
Jun 13, 11:45 AM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Door, Fond du Lac, Kenosha, Kewaunee and 10 more	90 min

Nearby

Mesoscale Discussions in Wisconsin, 2004 Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in Iowa, 2004 Every mesoscale discussion in 2004

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.