Alert archive / Wisconsin / Mesoscale Discussions in 2004

Mesoscale Discussion 1241

June 13, 2004Dickinson County, Iron County, Michigan; 25 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2004, 7:29 AM CDT for Dickinson County, Iron County, Michigan; 25 counties in Wisconsin. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 13, 2004, 7:29 AM CDT (12:29 UTC)
Expired: Jun 13, 2004, 9:00 AM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 27 counties

Dickinson County, MI, Iron County, MI, Adams County, WI, Clark County, WI, Florence County, WI, Forest County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marquette County, WI, Menominee County, WI, Monroe County, WI, Oneida County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 128 km from the middle of the area, began a volume at 12:33 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, 0.5 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1812 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 13, 11:45 AM CDT	Mesoscale Discussion	SPC	Alger, Allegan, Antrim, Arenac, Barry, Bay and 57 more	90 min
Jun 13, 12:00 PM CDT	Tornado Watch	SPC	Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 55 more	7 hr
Jun 13, 2:01 PM CDT	Mesoscale Discussion	SPC	Alcona, Allegan, Alpena, Antrim, Arenac, Barry and 55 more	89 min
Jun 13, 3:29 PM CDT	Mesoscale Discussion	SPC	Gogebic, Iron	2 hr
Jun 13, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	Monroe	5 hr
Jun 12, 7:00 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Chippewa, Clark, Crawford, Dunn and 15 more	2 hr
Jun 12, 9:10 PM CDT	Mesoscale Discussion	SPC	Barron, Burnett, Chippewa, Dunn, Pepin, Pierce and 3 more	2 hr
Jun 12, 9:33 PM CDT	Mesoscale Discussion	SPC	Barron, Burnett, Chippewa, Dunn, Pepin, Pierce and 3 more	117 min

Nearby

Mesoscale Discussions in Wisconsin, 2004 Mesoscale Discussions in Michigan, 2004 Every mesoscale discussion in 2004

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.