Alert archive / Michigan / Mesoscale Discussions in 2011

Mesoscale Discussion 1145

June 8, 201112 counties in Illinois; 15 counties in Indiana; 25 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2011, 11:45 PM CDT for 12 counties in Illinois; 15 counties in Indiana; 25 counties in Michigan. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2011, 11:45 PM CDT (04:45 UTC)
Expired: Jun 9, 2011, 1:15 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 52 counties

Bureau County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Putnam County, IL, Will County, IL, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lapeer County, MI, Livingston County, MI, Oakland County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI

The radar

The Grand Rapids radar (KGRR), 82 km from the middle of the area, began a volume at 04:47 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

Detroit, MI (KDTX), launched 00:00Z, 4.8 hours before the alert went out and 192 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: 2055 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 1930 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 11.1

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 8, 8:43 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 19 more	92 min
Jun 9, 1:44 AM CDT	Mesoscale Discussion	SPC	Bureau, Carroll, DeKalb, Henderson, Henry, Jo Daviess and 12 more	2 hr
Jun 9, 5:46 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cass, Champaign, Cook and 34 more	59 min
Jun 9, 4:29 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Christian, Fulton, Greene and 12 more	61 min
Jun 9, 4:43 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Pike	5 hr
Jun 9, 5:31 PM CDT	Mesoscale Discussion	SPC	Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 9 more	89 min
Jun 8, 9:39 PM CDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Bay, Calhoun, Clare, Clinton and 20 more	4 hr

Nearby

Mesoscale Discussions in Michigan, 2011 Mesoscale Discussions in Indiana, 2011 Mesoscale Discussions in Illinois, 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.