Alert archive / Ohio / Mesoscale Discussions in 2008

Mesoscale Discussion 1729

July 8, 20084 counties in Indiana; 41 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2008, 4:13 PM EDT for 4 counties in Indiana; 41 counties in Ohio. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2008, 4:13 PM EDT (20:13 UTC)
Expired: Jul 8, 2008, 5:15 PM EDT
In force: 62 min
Issued by: the Storm Prediction Center

All 45 counties

Fayette County, IN, Randolph County, IN, Union County, IN, Wayne County, IN, Ashland County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Geauga County, OH, Greene County, OH, Hardin County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Pickaway County, OH, Portage County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Shelby County, OH, Summit County, OH, Union County, OH, Warren County, OH, Wayne County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 104 km from the middle of the area, began a volume at 20:16 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 12:00Z, 8.2 hours before the alert went out and 171 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: 722 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 8, 12:05 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Carroll, Cass, Clinton and 19 more	85 min
Jul 8, 5:22 PM EDT	Mesoscale Discussion	SPC	Boone, Clay, Fountain, Greene, Hendricks, Montgomery and 9 more	53 min
Jul 8, 7:02 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clay, Clinton, Daviess and 41 more	58 min
Jul 8, 7:52 PM EDT	Severe Thunderstorm Watch	SPC	Bartholomew, Boone, Brown, Carroll, Clay, Clinton and 29 more	3 hr
Jul 8, 1:04 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Clinton, Fayette, Gallia and 9 more	56 min
Jul 8, 1:27 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Ashtabula, Crawford, Cuyahoga, Defiance and 30 more	6 hr
Jul 8, 5:56 PM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 7 more	64 min
Jul 8, 6:04 PM EDT	Severe Thunderstorm Watch	SPC	Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more	2 hr

Nearby

Mesoscale Discussions in Ohio, 2008 Mesoscale Discussions in Indiana, 2008 Every mesoscale discussion in 2008

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.