Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 1563

July 24, 201217 counties in Indiana; 20 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2012, 10:08 AM EDT for 17 counties in Indiana; 20 counties in Ohio. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 24, 2012, 10:08 AM EDT (14:08 UTC)
Expired: Jul 24, 2012, 11:45 AM EDT
In force: 97 min
Issued by: the Storm Prediction Center

All 37 counties

Adams County, IN, Blackford County, IN, Delaware County, IN, Fayette County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Madison County, IN, Randolph County, IN, Tipton County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Darke County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Highland County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 89 km from the middle of the area, began a volume at 14:08 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 508Jul 24, 10:35 AM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 2.1 hours before the alert went out and 89 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, 5:47 AM EDT	Severe Thunderstorm Watch	SPC	Jasper, Lake, Newton, Porter	4 hr
Jul 24, 7:35 AM EDT	Mesoscale Discussion	SPC	Blackford, Carroll, Cass, Clinton, Delaware, Elkhart and 23 more	55 min
Jul 24, 8:00 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, Boone, Carroll, Cass and 27 more	3 hr
Jul 24, 10:35 AM EDT	Severe Thunderstorm Watch	SPC	Dearborn, Fayette, Franklin, Ripley, Union, Wayne	3 hr
Jul 24, 4:25 PM EDT	Mesoscale Discussion	SPC	Crawford, Daviess, Dubois, Gibson, Knox, Orange and 6 more	95 min
Jul 24, 11:48 AM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Harrison, Jefferson, Stark	87 min
Jul 24, 11:59 AM EDT	Mesoscale Discussion	SPC	Adams, Brown, Butler, Clermont, Clinton, Fayette and 8 more	61 min
Jul 24, 12:33 PM EDT	Severe Thunderstorm Watch	SPC	Gallia, Jackson, Lawrence	6 hr
Jul 24, 1:52 PM EDT	Mesoscale Discussion	SPC	Lawrence, Scioto	53 min

Nearby

Mesoscale Discussions in Ohio, 2012 Mesoscale Discussions in Indiana, 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.