Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1697

July 22, 201120 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2011, 7:10 PM EDT for 20 counties in Ohio. It was in force for 35 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2011, 7:10 PM EDT (23:10 UTC)
Expired: Jul 22, 2011, 7:45 PM EDT
In force: 35 min
Issued by: the Storm Prediction Center

Counties Clark County, OH, Clinton County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hocking County, OH, Holmes County, OH, Knox County, OH, Licking County, OH, Madison County, OH, Montgomery County, OH, Morrow County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Ross County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 84 km from the middle of the area, began a volume at 23:11 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, 11.2 hours before the alert went out and 82 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: 3503 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 912 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 25 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
Jul 22, 11:20 AM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Champaign, Clark, Crawford, Darke and 33 more	55 min
Jul 22, 12:50 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Champaign, Clark, Clinton and 43 more	55 min
Jul 22, 1:14 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Auglaize, Champaign, Clark, Clinton and 45 more	7 hr
Jul 22, 3:17 PM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 4 more	58 min
Jul 22, 4:32 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Champaign, Clark, Clinton and 41 more	88 min
Jul 22, 5:19 PM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Coshocton, Geauga, Guernsey and 11 more	56 min
Jul 22, 5:37 PM EDT	Severe Thunderstorm Watch	SPC	Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more	4 hr
Jul 22, 5:59 PM EDT	Mesoscale Discussion	SPC	Gallia, Lawrence	2 hr

Nearby

Mesoscale Discussions in Ohio, 2011 Every mesoscale discussion in 2011

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.