Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1838

August 3, 2011Boyd County, Greenup County, Lewis County, Kentucky; 50 counties in Ohio; 26 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2011, 4:28 AM EDT for Boyd County, Greenup County, Lewis County, Kentucky; 50 counties in Ohio; 26 counties in West Virginia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 3, 2011, 4:28 AM EDT (08:28 UTC)
Expired: Aug 3, 2011, 6:00 AM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 79 counties

Boyd County, KY, Greenup County, KY, Lewis County, KY, Adams County, OH, Athens County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Lawrence 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, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wyandot County, OH, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Mason County, WV, Nicholas County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 107 km from the middle of the area, began a volume at 08:32 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, 8.5 hours before the alert went out and 126 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: 856 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1530 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 5.4

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 3, 1:48 AM EDT	Severe Thunderstorm Watch	SPC	Boone, Campbell, Carroll, Gallatin, Grant, Kenton and 2 more	8 hr
Aug 3, 8:21 AM EDT	Mesoscale Discussion	SPC	Boyd, Greenup, Lewis	84 min
Aug 3, 10:01 AM EDT	Severe Thunderstorm Watch	SPC	Adair, Anderson, Bath, Bell, Boyle, Breathitt and 47 more	7 hr
Aug 3, 1:26 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Bell, Boyle, Breckinridge and 51 more	64 min
Aug 3, 5:02 PM EDT	Severe Thunderstorm Watch	SPC	Adair, Allen, Anderson, Barren, Bourbon, Boyle and 46 more	6 hr
Aug 3, 7:43 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Boyle, Breckinridge and 49 more	62 min
Aug 2, 9:34 PM EDT	Mesoscale Discussion	SPC	Fulton, Williams	86 min
Aug 3, 12:25 AM EDT	Mesoscale Discussion	SPC	Williams	95 min

Nearby

Mesoscale Discussions in Ohio, 2011 Mesoscale Discussions in West Virginia, 2011 Mesoscale Discussions in Kentucky, 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.