Alert archive / Wisconsin / Mesoscale Discussions in 2012

Mesoscale Discussion 1370

July 3, 201212 counties in Michigan; 5 counties in Minnesota; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2012, 12:17 AM EDT for 12 counties in Michigan; 5 counties in Minnesota; 14 counties in Wisconsin. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jul 3, 2012, 12:17 AM EDT (04:17 UTC)
Expired: Jul 3, 2012, 1:45 AM EDT
In force: 88 min
Issued by: the Storm Prediction Center

All 31 counties

Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI, Aitkin County, MN, Carlton County, MN, Crow Wing County, MN, Pine County, MN, Wadena County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marinette County, WI, Oneida County, WI, Price County, WI, Sawyer County, WI, Vilas County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 159 km from the middle of the area, began a volume at 04:18 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, 4.3 hours before the alert went out and 269 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: 3426 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.1

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
Jul 2, 10:17 PM EDT	Mesoscale Discussion	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 3 more	118 min
Jul 2, 11:13 PM EDT	Severe Thunderstorm Watch	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 3 more	4 hr
Jul 3, 3:24 AM EDT	Mesoscale Discussion	SPC	Antrim, Bay, Benzie, Charlevoix, Cheboygan, Chippewa and 24 more	96 min
Jul 3, 4:34 PM EDT	Mesoscale Discussion	SPC	Genesee, Lapeer, Lenawee, Livingston, Macomb, Monroe and 4 more	86 min
Jul 3, 3:00 AM EDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chisago, Dakota, Hennepin and 11 more	90 min
Jul 2, 8:23 PM EDT	Mesoscale Discussion	SPC	Brown, Calumet, Columbia, Dane, Dodge, Florence and 18 more	2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2012 Mesoscale Discussions in Michigan, 2012 Mesoscale Discussions in Minnesota, 2012 Every mesoscale discussion in 2012

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.