Alert archive / Ohio / Mesoscale Discussions in 2018

Mesoscale Discussion 888

June 26, 2018Dearborn County, Indiana; Boone County, Campbell County, Kenton County, Kentucky; 29 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2018, 1:18 PM EDT for Dearborn County, Indiana; Boone County, Campbell County, Kenton County, Kentucky; 29 counties in Ohio. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2018, 1:18 PM EDT (17:18 UTC)
Expired: Jun 26, 2018, 2:45 PM EDT
In force: 87 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 33 counties

Dearborn County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Adams County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hardin County, OH, Highland County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 33 km from the middle of the area, began a volume at 17:20 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, 5.3 hours before the alert went out and 31 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: 2 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 25, 9:08 PM EDT	Mesoscale Discussion	SPC	Posey, Vanderburgh	2 hr
Jun 26, 8:39 AM EDT	Mesoscale Discussion	SPC	Clay, Daviess, Fountain, Gibson, Greene, Knox and 10 more	2 hr
Jun 26, 10:26 AM EDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 9 more	5 hr
Jun 26, 12:08 PM EDT	Mesoscale Discussion	SPC	Perry, Spencer	67 min
Jun 26, 2:43 PM EDT	Mesoscale Discussion	SPC	McCreary, Wayne	62 min
Jun 26, 2:53 PM EDT	Mesoscale Discussion	SPC	Ballard	67 min
Jun 26, 6:26 PM EDT	Severe Thunderstorm Watch	SPC	Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more	6 hr

Nearby

Mesoscale Discussions in Ohio, 2018 Mesoscale Discussions in Kentucky, 2018 Mesoscale Discussions in Indiana, 2018 Every mesoscale discussion in 2018

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.