Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 618

May 11, 201511 counties in Indiana; 12 counties in Michigan; 41 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 11, 2015, 4:39 PM EDT for 11 counties in Indiana; 12 counties in Michigan; 41 counties in Ohio. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: May 11, 2015, 4:39 PM EDT (20:39 UTC)
Expired: May 11, 2015, 5:45 PM EDT
In force: 66 min
Issued by: the Storm Prediction Center

All 64 counties

Adams County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Franklin County, IN, Henry County, IN, Jay County, IN, Randolph County, IN, Rush County, IN, Union County, IN, Wayne County, IN, Genesee County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Sanilac County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Knox County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 163 km from the middle of the area, began a volume at 20:40 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.7 hours before the alert went out and 184 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: 1744 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 118 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
May 11, 12:48 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Blackford, Brown, Dearborn and 36 more	2 hr
May 11, 1:14 PM EDT	Tornado Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 49 more	7 hr
May 11, 2:58 PM EDT	Mesoscale Discussion	SPC	Adams, Jay, Randolph, Union, Wayne	62 min
May 11, 4:03 PM EDT	Mesoscale Discussion	SPC	Clark, Crawford, Floyd, Harrison, Perry, Washington	2 hr
May 11, 4:56 PM EDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Floyd, Harrison, Jefferson, Perry and 1 more	5 hr
May 11, 3:46 PM EDT	Mesoscale Discussion	SPC	Arenac, Bay, Clare, Gladwin, Isabella, Midland and 2 more	119 min
May 11, 1:53 PM EDT	Mesoscale Discussion	SPC	Adams, Athens, Brown, Gallia, Guernsey, Hocking and 12 more	3 hr
May 11, 2:19 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Athens, Brown, Clermont, Clinton, Coshocton and 22 more	8 hr
May 11, 4:13 PM EDT	Mesoscale Discussion	SPC	Adams, Athens, Gallia, Guernsey, Hocking, Jackson and 10 more	92 min
May 11, 4:24 PM EDT	Mesoscale Discussion	SPC	Columbiana, Geauga, Mahoning, Portage, Stark, Summit and 1 more	2 hr
May 11, 5:47 PM EDT	Severe Thunderstorm Watch	SPC	Ashtabula, Belmont, Carroll, Columbiana, Cuyahoga, Geauga and 12 more	4 hr
May 11, 6:23 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Clinton, Fayette, Greene and 5 more	97 min
May 11, 7:26 PM EDT	Mesoscale Discussion	SPC	Belmont, Columbiana, Harrison, Jefferson, Mahoning, Monroe and 1 more	64 min

Nearby

Mesoscale Discussions in Ohio, 2015 Mesoscale Discussions in Michigan, 2015 Mesoscale Discussions in Indiana, 2015 Every mesoscale discussion in 2015

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.