Alert archive / Ohio / Mesoscale Discussions in 2017

Mesoscale Discussion 785

May 19, 20174 states

The Storm Prediction Center issued this mesoscale discussion at May 19, 2017, 5:50 PM EDT for 4 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: May 19, 2017, 5:50 PM EDT (21:50 UTC)
Expired: May 19, 2017, 6:45 PM EDT
In force: 55 min
Issued by: the Storm Prediction Center

All 53 counties

Bracken County, KY, Campbell County, KY, Grant County, KY, Mason County, KY, Pendleton County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Clermont County, OH, Fairfield County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Greene County, PA, Washington County, PA, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 106 km from the middle of the area, began a volume at 21:53 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, 9.8 hours before the alert went out and 104 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: 387 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1118 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 1:38 PM EDT	Mesoscale Discussion	SPC	Anderson, Bath, Boone, Bourbon, Boyd, Bracken and 31 more	2 hr
May 19, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 5 more	6 hr
May 19, 6:03 PM EDT	Mesoscale Discussion	SPC	Carlisle, Fulton, Hickman	117 min
May 19, 3:36 PM EDT	Mesoscale Discussion	SPC	Bucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more	114 min

Nearby

Mesoscale Discussions in Ohio, 2017 Mesoscale Discussions in West Virginia, 2017 Mesoscale Discussions in Kentucky, 2017 Every mesoscale discussion in 2017

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.