Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 2218

September 29, 2011Boone County, Campbell County, Kenton County, Kentucky; 19 counties in Michigan; 46 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Sep 29, 2011, 6:21 PM EDT for Boone County, Campbell County, Kenton County, Kentucky; 19 counties in Michigan; 46 counties in Ohio. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Sep 29, 2011, 6:21 PM EDT (22:21 UTC)
Expired: Sep 29, 2011, 7:45 PM EDT
In force: 84 min
Issued by: the Storm Prediction Center

All 68 counties

Boone County, KY, Campbell County, KY, Kenton County, KY, Barry County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kent County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Montcalm County, MI, Oakland County, MI, Saginaw County, MI, Shiawassee County, MI, Washtenaw County, MI, Wayne County, MI, Adams County, OH, Ashland County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Seneca County, OH, Union County, OH, Warren County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 152 km from the middle of the area, began a volume at 22:25 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 12:00Z, 10.4 hours before the alert went out and 171 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: 692 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 32 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
Sep 29, 4:28 PM EDT	Mesoscale Discussion	SPC	Boone, Campbell, Carroll, Gallatin, Grant, Kenton and 2 more	92 min

Nearby

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