Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 1319

June 30, 20129 counties in Indiana; 20 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2012, 5:23 AM EDT for 9 counties in Indiana; 20 counties in Ohio. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jun 30, 2012, 5:23 AM EDT (09:23 UTC)
Expired: Jun 30, 2012, 7:00 AM EDT
In force: 97 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 29 counties

Adams County, IN, Fayette County, IN, Henry County, IN, Jay County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Union County, IN, Wayne County, IN, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fayette County, OH, Franklin County, OH, Greene 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), 83 km from the middle of the area, began a volume at 09:25 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.4 hours before the alert went out and 83 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: 541 J/kg
Mixed-layer CIN: -417 J/kg
Mixed-layer LCL: 1999 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 215 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
Jun 29, 8:33 PM EDT	Mesoscale Discussion	SPC	Newton	87 min
Jun 30, 12:46 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 32 more	119 min
Jun 30, 5:27 PM EDT	Mesoscale Discussion	SPC	Blackford, Boone, Clinton, Dearborn, Decatur, Delaware and 25 more	93 min
Jun 30, 6:55 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Benton, Blackford, Boone, Brown, Carroll and 61 more	3 hr

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.