Alert archive / Ohio / Mesoscale Discussions in 2017

Mesoscale Discussion 1515

August 17, 20179 counties in Kentucky; 33 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2017, 3:33 PM EDT for 9 counties in Kentucky; 33 counties in Ohio. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Aug 17, 2017, 3:33 PM EDT (19:33 UTC)
Expired: Aug 17, 2017, 4:30 PM EDT
In force: 57 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 42 counties

Boone County, KY, Bracken County, KY, Campbell County, KY, Gallatin County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Licking County, OH, Madison 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, Warren County, OH, Washington County, OH

The radar

The Cincinnati radar (KILN), 65 km from the middle of the area, began a volume at 19:37 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, 7.6 hours before the alert went out and 63 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: 735 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.8

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
Aug 17, 12:04 PM EDT	Mesoscale Discussion	SPC	Boone, Campbell, Kenton	116 min

Nearby

Mesoscale Discussions in Ohio, 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.