Alert archive / Wisconsin / Mesoscale Discussions in 2017

Mesoscale Discussion 987

June 11, 2017Dickinson County, Menominee County, Michigan; 30 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2017, 12:00 PM CDT for Dickinson County, Menominee County, Michigan; 30 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2017, 12:00 PM CDT (17:00 UTC)
Expired: Jun 11, 2017, 2:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 32 counties

Dickinson County, MI, Menominee County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Clark County, WI, Door County, WI, Florence County, WI, Fond du Lac County, WI, Forest County, WI, Green Lake County, WI, Jackson County, WI, Juneau County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Sheboygan County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 84 km from the middle of the area, began a volume at 17:01 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 12:00Z, 5.0 hours before the alert went out and 85 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: 364 J/kg
Mixed-layer CIN: -366 J/kg
Mixed-layer LCL: 1105 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 8:12 PM CDT	Mesoscale Discussion	SPC	Baraga, Gogebic, Houghton, Keweenaw, Ontonagon	2 hr
Jun 11, 9:30 AM CDT	Mesoscale Discussion	SPC	Iron	60 min
Jun 11, 10:39 AM CDT	Severe Thunderstorm Watch	SPC	Delta, Dickinson, Gogebic, Iron, Menominee	5 hr
Jun 11, 1:30 PM CDT	Severe Thunderstorm Watch	SPC	Alpena, Antrim, Charlevoix, Cheboygan, Chippewa, Emmet and 7 more	3 hr
Jun 11, 2:46 PM CDT	Mesoscale Discussion	SPC	Alcona, Alpena, Antrim, Charlevoix, Cheboygan, Chippewa and 11 more	119 min
Jun 11, 6:20 PM CDT	Mesoscale Discussion	SPC	Iron	2 hr
Jun 11, 5:51 AM CDT	Mesoscale Discussion	SPC	Barron, Buffalo, Chippewa, Dunn, Eau Claire, Pepin and 4 more	84 min
Jun 11, 6:28 AM CDT	Severe Thunderstorm Watch	SPC	Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 12 more	6 hr

Nearby

Mesoscale Discussions in Wisconsin, 2017 Mesoscale Discussions in Michigan, 2017 Every mesoscale discussion in 2017

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.