Alert archive / Wisconsin / Mesoscale Discussions in 2018

Mesoscale Discussion 774

June 17, 20185 counties in Michigan; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2018, 7:29 PM EDT for 5 counties in Michigan; 14 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 17, 2018, 7:29 PM EDT (23:29 UTC)
Expired: Jun 17, 2018, 9:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Baraga County, MI, Dickinson County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Florence County, WI, Forest County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Wood County, WI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.5 hours before the alert went out and 130 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: 1403 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 122 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 17, 1:12 PM EDT	Mesoscale Discussion	SPC	Gogebic, Iron	93 min
Jun 17, 4:08 PM EDT	Mesoscale Discussion	SPC	Dickinson, Gogebic, Iron, Menominee	97 min
Jun 17, 4:46 PM EDT	Severe Thunderstorm Watch	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Marquette and 2 more	8 hr
Jun 16, 10:08 PM EDT	Mesoscale Discussion	SPC	Ashland, Bayfield, Burnett, Douglas, Iron, Sawyer and 1 more	67 min
Jun 16, 10:47 PM EDT	Severe Thunderstorm Watch	SPC	Ashland, Barron, Bayfield, Burnett, Douglas, Iron and 5 more	7 hr
Jun 17, 12:44 AM EDT	Mesoscale Discussion	SPC	Ashland, Barron, Bayfield, Burnett, Douglas, Iron and 6 more	2 hr
Jun 17, 3:38 AM EDT	Mesoscale Discussion	SPC	Ashland, Barron, Burnett, Chippewa, Douglas, Iron and 11 more	97 min
Jun 17, 1:34 PM EDT	Tornado Watch	SPC	Ashland, Barron, Bayfield, Burnett, Chippewa, Douglas and 9 more	8 hr
Jun 17, 6:23 PM EDT	Mesoscale Discussion	SPC	Ashland, Barron, Bayfield, Burnett, Chippewa, Dunn and 10 more	2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2018 Mesoscale Discussions in Michigan, 2018 Every mesoscale discussion in 2018

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.