Alert archive / Ohio / Mesoscale Discussions in 2014

Mesoscale Discussion 1353

July 13, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2014, 12:37 PM EDT for 5 states. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2014, 12:37 PM EDT (16:37 UTC)
Expired: Jul 13, 2014, 1:30 PM EDT
In force: 53 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 77 counties

Dearborn County, IN, Franklin County, IN, Ohio County, IN, Union County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Madison County, OH, Mahoning County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Preble County, OH, Ross County, OH, Stark County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV, Pleasants County, WV, Tyler County, WV, Wetzel County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 136 km from the middle of the area, began a volume at 16:40 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 413Jul 13, 1:20 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.6 hours before the alert went out and 134 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: 465 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

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 12, 10:51 PM EDT	Tornado Watch	SPC	Benton, Jasper, Lake, Newton, Porter	3 hr
Jul 12, 11:32 PM EDT	Mesoscale Discussion	SPC	DeKalb, Elkhart, Kosciusko, LaGrange, LaPorte, Marshall and 5 more	118 min
Jul 13, 1:17 PM EDT	Severe Thunderstorm Watch	SPC	Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more	7 hr
Jul 13, 1:41 PM EDT	Mesoscale Discussion	SPC	Brown, Clark, Crawford, Daviess, Dubois, Floyd and 22 more	94 min
Jul 13, 6:18 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Clark, Dearborn, Decatur, Floyd, Franklin and 8 more	87 min
Jul 13, 3:10 PM EDT	Mesoscale Discussion	SPC	Bedford, Berks, Blair, Bradford, Cambria, Cameron and 34 more	2 hr
Jul 13, 4:06 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Bedford, Blair, Bradford, Cambria, Cameron and 32 more	6 hr
Jul 13, 5:49 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Blair, Bradford, Carbon and 30 more	86 min
Jul 13, 7:06 PM EDT	Mesoscale Discussion	SPC	Berks, Bucks, Carbon, Chester, Columbia, Cumberland and 20 more	84 min
Jul 13, 7:49 PM EDT	Severe Thunderstorm Watch	SPC	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	4 hr

Nearby

Mesoscale Discussions in Ohio, 2014 Mesoscale Discussions in Pennsylvania, 2014 Mesoscale Discussions in West Virginia, 2014 Every mesoscale discussion in 2014

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.