Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1576

July 11, 201165 counties in Ohio; 6 counties in Pennsylvania; 25 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2011, 1:42 PM EDT for 65 counties in Ohio; 6 counties in Pennsylvania; 25 counties in West Virginia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jul 11, 2011, 1:42 PM EDT (17:42 UTC)
Expired: Jul 11, 2011, 3:15 PM EDT
In force: 93 min
Issued by: the Storm Prediction Center

All 96 counties

Ashland County, OH, Ashtabula County, OH, Athens County, OH, Auglaize County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hardin County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Richland County, OH, Ross County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Lawrence County, PA, Washington County, PA, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cleveland radar (KCLE), 130 km from the middle of the area, began a volume at 17:44 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 628Jul 11, 2:15 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 5.7 hours before the alert went out and 145 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: 95 J/kg
Mixed-layer CIN: -371 J/kg
Mixed-layer LCL: 1367 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 143 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
Jul 11, 8:10 AM EDT	Mesoscale Discussion	SPC	Defiance, Fulton, Henry, Paulding, Williams	95 min
Jul 11, 8:50 AM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Brown, Butler, Champaign and 51 more	55 min
Jul 11, 10:16 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Ashland, Ashtabula, Auglaize, Belmont and 64 more	9 hr
Jul 11, 10:55 AM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Carroll, Champaign, Columbiana and 38 more	65 min
Jul 11, 12:34 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Champaign, Coshocton, Crawford and 42 more	56 min
Jul 11, 2:16 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Gallia, Jackson, Lawrence, Meigs, Monroe and 5 more	6 hr
Jul 11, 3:43 PM EDT	Mesoscale Discussion	SPC	Adams, Athens, Belmont, Brown, Butler, Carroll and 31 more	92 min
Jul 11, 5:54 PM EDT	Mesoscale Discussion	SPC	Brown, Clermont, Hamilton	96 min
Jul 11, 6:16 PM EDT	Mesoscale Discussion	SPC	Darke, Mercer, Van Wert	59 min
Jul 11, 7:18 PM EDT	Severe Thunderstorm Watch	SPC	Auglaize, Butler, Champaign, Clark, Clinton, Darke and 12 more	3 hr
Jul 11, 5:47 PM EDT	Severe Thunderstorm Watch	SPC	Bedford, Blair, Cambria, Franklin, Fulton, Huntingdon and 2 more	5 hr
Jul 11, 7:44 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 4 more	61 min

Nearby

Mesoscale Discussions in Ohio, 2011 Mesoscale Discussions in West Virginia, 2011 Mesoscale Discussions in Pennsylvania, 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.