Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 1566

July 24, 20129 counties in Kentucky; 14 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2012, 11:59 AM EDT for 9 counties in Kentucky; 14 counties in Ohio. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jul 24, 2012, 11:59 AM EDT (15:59 UTC)
Expired: Jul 24, 2012, 1:00 PM EDT
In force: 61 min
Issued by: the Storm Prediction Center

All 23 counties

Boone County, KY, Bracken County, KY, Campbell County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Clermont County, OH, Clinton County, OH, Fayette County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Montgomery County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 37 km from the middle of the area, began a volume at 15:59 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 509Jul 24, 12:35 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.0 hours before the alert went out and 39 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: 1858 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.7

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 24, 10:35 AM EDT	Severe Thunderstorm Watch	SPC	Boone, Bracken, Campbell, Kenton, Lewis, Mason and 2 more	3 hr
Jul 24, 11:43 AM EDT	Mesoscale Discussion	SPC	Bath, Bourbon, Boyd, Breathitt, Carter, Clark and 26 more	62 min
Jul 24, 12:33 PM EDT	Severe Thunderstorm Watch	SPC	Adair, Anderson, Bath, Bell, Bourbon, Boyd and 61 more	6 hr
Jul 24, 1:52 PM EDT	Mesoscale Discussion	SPC	Anderson, Bath, Bourbon, Boyd, Boyle, Breathitt and 47 more	53 min
Jul 24, 3:25 PM EDT	Mesoscale Discussion	SPC	Adair, Anderson, Bell, Bourbon, Boyle, Breathitt and 44 more	95 min
Jul 24, 4:25 PM EDT	Mesoscale Discussion	SPC	Breckinridge, Butler, Caldwell, Christian, Crittenden, Daviess and 17 more	95 min
Jul 24, 6:20 PM EDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Barren, Bell, Breckinridge, Butler and 26 more	4 hr
Jul 24, 10:08 AM EDT	Mesoscale Discussion	SPC	Auglaize, Butler, Champaign, Clark, Clinton, Darke and 14 more	97 min
Jul 24, 11:48 AM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Harrison, Jefferson, Stark	87 min

Nearby

Mesoscale Discussions in Ohio, 2012 Mesoscale Discussions in Kentucky, 2012 Every mesoscale discussion in 2012

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.