Alert archive / Ohio / Mesoscale Discussions in 2008

Mesoscale Discussion 1513

June 21, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2008, 7:04 PM EDT for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jun 21, 2008, 7:04 PM EDT (23:04 UTC)
Expired: Jun 21, 2008, 9:00 PM EDT
In force: 116 min
Issued by: the Storm Prediction Center

All 54 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ripley County, IN, Union County, IN, Ashtabula County, OH, Athens County, OH, Belmont County, OH, Butler County, OH, Carroll County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Fayette County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Mahoning County, OH, Medina County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Ross County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Beaver County, PA, Crawford County, PA, Erie County, PA, Lawrence County, PA, Mercer County, PA, Brooke County, WV, Hancock County, WV

The radar

The Cincinnati radar (KILN), 135 km from the middle of the area, began a volume at 23:05 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, 11.1 hours before the alert went out and 132 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: 99 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -7 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 21, 10:32 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 39 more	88 min
Jun 21, 11:52 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Bartholomew, Blackford, Boone, Brown and 57 more	7 hr
Jun 21, 2:38 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Bartholomew, Benton, Blackford, Boone and 57 more	97 min
Jun 21, 4:36 PM EDT	Severe Thunderstorm Watch	SPC	Dearborn, Franklin, Ohio, Ripley	4 hr
Jun 21, 1:12 PM EDT	Mesoscale Discussion	SPC	Cameron, Elk, McKean, Potter, Tioga	93 min

Nearby

Mesoscale Discussions in Ohio, 2008 Mesoscale Discussions in Indiana, 2008 Mesoscale Discussions in Pennsylvania, 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.