Alert archive / Wisconsin / Mesoscale Discussions in 2006

Mesoscale Discussion 1702

August 2, 20065 counties in Iowa; 16 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2006, 1:16 AM CDT for 5 counties in Iowa; 16 counties in Wisconsin. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Aug 2, 2006, 1:16 AM CDT (06:16 UTC)
Expired: Aug 2, 2006, 3:15 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center

All 21 counties

Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Winneshiek County, IA, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Marquette County, WI, Ozaukee County, WI, Richland County, WI, Sauk County, WI, Sheboygan County, WI, Vernon County, WI, Washington County, WI

The radar

The La Crosse radar (KARX), 117 km from the middle of the area, began a volume at 06:18 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.3 hours before the alert went out and 202 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: 1685 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1375 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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
Aug 1, 7:17 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 30 more	118 min
Aug 1, 8:00 PM CDT	Tornado Watch	SPC	Emmet, Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas and 2 more	5 hr
Aug 1, 11:51 PM CDT	Mesoscale Discussion	SPC	Bremer, Butler, Calhoun, Carroll, Cerro Gordo, Chickasaw and 11 more	54 min
Aug 2, 12:42 PM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more	2 hr
Aug 2, 1:16 PM CDT	Mesoscale Discussion	SPC	Taylor	119 min
Aug 2, 5:13 PM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Ringgold, Taylor, Wayne	2 hr
Aug 2, 5:46 PM CDT	Severe Thunderstorm Watch	SPC	Decatur, Fremont, Page, Ringgold, Taylor, Wayne	6 hr
Aug 2, 5:52 PM CDT	Mesoscale Discussion	SPC	Jackson	113 min
Aug 2, 2:39 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Crawford, Dane, Dodge and 25 more	8 hr

Nearby

Mesoscale Discussions in Wisconsin, 2006 Mesoscale Discussions in Iowa, 2006 Every mesoscale discussion in 2006

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.