Alert archive / Michigan / Mesoscale Discussions in 2011

Mesoscale Discussion 1355

June 22, 201116 counties in Indiana; 38 counties in Michigan; 9 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 22, 2011, 11:46 AM EDT for 16 counties in Indiana; 38 counties in Michigan; 9 counties in Ohio. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Jun 22, 2011, 11:46 AM EDT (15:46 UTC)
Expired: Jun 22, 2011, 1:45 PM EDT
In force: 119 min
Issued by: the Storm Prediction Center

All 63 counties

Adams County, IN, Allen County, IN, Blackford County, IN, DeKalb County, IN, Elkhart County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, Miami County, IN, Noble County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Arenac County, MI, Barry County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Mecosta County, MI, Midland County, MI, Monroe County, MI, Montcalm County, MI, Newaygo County, MI, Oakland County, MI, Osceola County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Detroit radar (KDTX), 84 km from the middle of the area, began a volume at 15:46 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 538Jun 22, 1:15 PM EDT

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 3.8 hours before the alert went out and 88 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: 607 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 22, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, DeKalb, Delaware, Elkhart and 12 more	6 hr
Jun 22, 4:35 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Delaware, Jay, Madison and 2 more	55 min
Jun 22, 4:43 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more	92 min
Jun 22, 6:36 PM EDT	Mesoscale Discussion	SPC	Clark, Dearborn, Floyd, Franklin, Jefferson, Ohio and 4 more	54 min

Nearby

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