Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 2024

July 30, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Jul 30, 2003, 2:06 PM CDT for 5 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 30, 2003, 2:06 PM CDT (19:06 UTC)
Expired: Jul 30, 2003, 4:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 53 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Grundy County, IA, Hardin County, IA, Howard County, IA, Tama County, IA, Winneshiek County, IA, Jo Daviess County, IL, Iron County, MI, Houston County, MN, Adams County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Florence County, WI, Fond du Lac County, WI, Forest County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Juneau County, WI, Lafayette County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Vernon County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 43 km from the middle of the area, began a volume at 19:09 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.

Severe Thunderstorm Watch 816Jul 30, 2:20 PM CDT

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.1 hours before the alert went out and 217 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: 239 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -70 m²/s²
0-3 km storm-relative helicity: -72 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
Jul 30, 6:22 PM CDT	Mesoscale Discussion	SPC	Carroll, Henderson, Henry, Jo Daviess, Mercer, Ogle and 4 more	113 min
Jul 30, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Baraga, Dickinson, Gogebic, Iron, Menominee, Ontonagon	6 hr
Jul 29, 8:10 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Cass, Crow Wing, Itasca, Kanabec and 3 more	65 min
Jul 30, 12:26 PM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Crow Wing, Pine	2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2003 Mesoscale Discussions in Iowa, 2003 Mesoscale Discussions in Illinois, 2003 Every mesoscale discussion in 2003

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.