Alert archive / Michigan / Mesoscale Discussions in 2011

Mesoscale Discussion 1083

June 3, 201114 counties in Michigan; Florence County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2011, 10:07 PM EDT for 14 counties in Michigan; Florence County, Wisconsin. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 3, 2011, 10:07 PM EDT (02:07 UTC)
Expired: Jun 3, 2011, 11:30 PM EDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Alger County, MI, Baraga County, MI, Chippewa County, MI, Delta County, MI, Dickinson County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Schoolcraft County, MI, Florence County, WI

The radar

The Marquette radar (KMQT), 15 km from the middle of the area, began a volume at 02:09 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 425Jun 3, 11:50 PM EDT

The nearest sounding before it

Alpena, MI (KAPX), launched 00:00Z, 2.1 hours before the alert went out and 415 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: 1617 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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 3, 11:49 PM EDT	Severe Thunderstorm Watch	SPC	Alger, Baraga, Delta, Dickinson, Gogebic, Houghton and 6 more	5 hr
Jun 4, 3:08 PM EDT	Severe Thunderstorm Watch	SPC	Berrien, Branch, Calhoun, Cass, Genesee, Hillsdale and 13 more	7 hr

Nearby

Mesoscale Discussions in Michigan, 2011 Mesoscale Discussions in Wisconsin, 2011 Every mesoscale discussion in 2011

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.