Alert archive / Wisconsin / Mesoscale Discussions in 2007

Mesoscale Discussion 1191

June 18, 2007Dickinson County, Marquette County, Menominee County, Michigan; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2007, 6:19 PM CDT for Dickinson County, Marquette County, Menominee County, Michigan; 14 counties in Wisconsin. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 18, 2007, 6:19 PM CDT (23:19 UTC)
Expired: Jun 18, 2007, 7:45 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Dickinson County, MI, Marquette County, MI, Menominee County, MI, Brown County, WI, Calumet County, WI, Fond du Lac County, WI, Green Lake County, WI, Kewaunee County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Shawano County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 100 km from the middle of the area, began a volume at 23:19 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, 11.3 hours before the alert went out and 102 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: 1126 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

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
Jun 18, 11:06 AM CDT	Mesoscale Discussion	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 2 more	54 min
Jun 18, 12:46 PM CDT	Severe Thunderstorm Watch	SPC	Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 3 more	7 hr
Jun 18, 3:27 PM CDT	Mesoscale Discussion	SPC	Alger, Baraga, Dickinson, Gogebic, Iron, Marquette and 2 more	93 min
Jun 18, 12:44 AM CDT	Mesoscale Discussion	SPC	Bayfield, Douglas	61 min

Nearby

Mesoscale Discussions in Wisconsin, 2007 Mesoscale Discussions in Michigan, 2007 Every mesoscale discussion in 2007

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.