Alert archive / Ohio / Mesoscale Discussions in 2020

Mesoscale Discussion 301

April 7, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2020, 10:04 PM EDT for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Apr 7, 2020, 10:04 PM EDT (02:04 UTC)
Expired: Apr 7, 2020, 11:30 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center

All 66 counties

Adams County, IN, Allen County, IN, DeKalb County, IN, Fulton County, IN, Huntington County, IN, Kosciusko County, IN, Noble County, IN, Pulaski County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Allen County, OH, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fulton County, OH, Geauga County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Wayne County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH, Beaver County, PA, Crawford County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Hancock County, WV

The radar

The Cleveland radar (KCLE), 130 km from the middle of the area, began a volume at 02:06 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 85Apr 7, 11:40 PM EDT

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 2.1 hours before the alert went out and 162 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: 847 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 982 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 7, 8:22 PM EDT	Mesoscale Discussion	SPC	Lake, Porter	83 min
Apr 7, 9:07 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, Cass, DeKalb, Elkhart and 18 more	6 hr
Apr 8, 12:20 AM EDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Cass, Clinton, Delaware and 14 more	85 min
Apr 8, 5:24 PM EDT	Tornado Watch	SPC	Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick	7 hr
Apr 8, 6:52 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clark, Clay, Clinton and 52 more	2 hr
Apr 8, 7:24 PM EDT	Tornado Watch	SPC	Bartholomew, Boone, Brown, Carroll, Clark, Clay and 51 more	5 hr
Apr 7, 11:40 PM EDT	Severe Thunderstorm Watch	SPC	Athens, Belmont, Carroll, Champaign, Clark, Columbiana and 31 more	6 hr
Apr 8, 1:52 AM EDT	Mesoscale Discussion	SPC	Belmont, Guernsey, Harrison, Monroe, Noble, Washington	83 min
Apr 8, 3:16 AM EDT	Mesoscale Discussion	SPC	Athens, Clark, Clinton, Fairfield, Fayette, Gallia and 15 more	89 min
Apr 8, 5:30 AM EDT	Mesoscale Discussion	SPC	Fayette, Gallia, Highland, Jackson, Meigs, Pike and 2 more	30 min
Apr 8, 12:39 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Gallia, Lawrence, Scioto	96 min
Apr 8, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	Lawrence	7 hr
Apr 7, 10:54 PM EDT	Mesoscale Discussion	SPC	Armstrong, Blair, Butler, Cambria, Cameron, Centre and 19 more	2 hr
Apr 8, 2:14 AM EDT	Severe Thunderstorm Watch	SPC	Bedford, Franklin, Fulton	2 hr
Apr 8, 3:53 AM EDT	Mesoscale Discussion	SPC	Hardy, Jefferson	97 min
Apr 8, 4:05 PM EDT	Mesoscale Discussion	SPC	Boone, Logan, McDowell, Mercer, Mingo, Monroe and 3 more	85 min

Nearby

Mesoscale Discussions in Ohio, 2020 Mesoscale Discussions in Indiana, 2020 Mesoscale Discussions in Pennsylvania, 2020 Every mesoscale discussion in 2020

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.