Alert archive / Ohio / Mesoscale Discussions in 2007

Mesoscale Discussion 1765

August 16, 200738 counties in Ohio; 18 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2007, 3:21 AM EDT for 38 counties in Ohio; 18 counties in West Virginia. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued: Aug 16, 2007, 3:21 AM EDT (07:21 UTC)
Expired: Aug 16, 2007, 3:45 AM EDT
In force: 24 min
Issued by: the Storm Prediction Center

All 56 counties

Athens County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Union County, OH, Vinton County, OH, Washington County, OH, Wyandot County, OH, Braxton County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 113 km from the middle of the area, began a volume at 07:23 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, 7.4 hours before the alert went out and 110 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: 216 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 2096 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 318 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
Aug 15, 10:11 PM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Defiance, Hardin, Henry, Logan and 5 more	64 min
Aug 15, 10:35 PM EDT	Tornado Watch	SPC	Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more	4 hr
Aug 16, 12:01 AM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Crawford, Defiance, Hancock, Hardin and 14 more	89 min
Aug 16, 1:02 AM EDT	Severe Thunderstorm Watch	SPC	Auglaize, Champaign, Clark, Crawford, Darke, Delaware and 21 more	4 hr
Aug 16, 4:50 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Clermont, Gallia, Hamilton, Highland and 5 more	6 hr
Aug 16, 7:39 PM EDT	Severe Thunderstorm Watch	SPC	Braxton, Calhoun, Clay, Fayette, Gilmer, Greenbrier and 13 more	3 hr

Nearby

Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in West Virginia, 2007 Every mesoscale discussion in 2007

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.