Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 2206

August 20, 2003Gogebic County, Iron County, Ontonagon County, Michigan; 9 counties in Minnesota; 34 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2003, 7:22 PM CDT for Gogebic County, Iron County, Ontonagon County, Michigan; 9 counties in Minnesota; 34 counties in Wisconsin. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Aug 20, 2003, 7:22 PM CDT (00:22 UTC)
Expired: Aug 20, 2003, 9:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 46 counties

Gogebic County, MI, Iron County, MI, Ontonagon County, MI, Aitkin County, MN, Carlton County, MN, Chisago County, MN, Itasca County, MN, Kanabec County, MN, Lake County, MN, Pine County, MN, Saint Louis County, MN, Washington County, MN, Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI, Waupaca County, WI, Wood County, WI

The radar

The Duluth radar (KDLH), 138 km from the middle of the area, began a volume at 00:24 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 nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.4 hours before the alert went out and 280 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: 2736 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.0

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
Aug 21, 4:29 AM CDT	Mesoscale Discussion	SPC	Antrim, Arenac, Barry, Bay, Calhoun, Cheboygan and 26 more	3 hr
Aug 21, 12:07 PM CDT	Mesoscale Discussion	SPC	Alger, Antrim, Benzie, Charlevoix, Cheboygan, Chippewa and 34 more	113 min
Aug 21, 12:30 PM CDT	Tornado Watch	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more	6 hr
Aug 21, 2:49 PM CDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more	86 min
Aug 21, 5:20 PM CDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Arenac, Bay, Benzie and 31 more	55 min

Nearby

Mesoscale Discussions in Wisconsin, 2003 Mesoscale Discussions in Minnesota, 2003 Mesoscale Discussions in Michigan, 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.