Alert archive / Kentucky / Mesoscale Discussions in 2017

Mesoscale Discussion 880

May 27, 201732 counties in Kentucky; 10 counties in Ohio; 19 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 8:07 PM EDT for 32 counties in Kentucky; 10 counties in Ohio; 19 counties in West Virginia. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 27, 2017, 8:07 PM EDT (00:07 UTC)
Expired: May 27, 2017, 9:30 PM EDT
In force: 83 min
Issued by: the Storm Prediction Center

All 61 counties

Bath County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Wolfe County, KY, Adams County, OH, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Pike County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 68 km from the middle of the area, began a volume at 00:08 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, 0.1 hours before the alert went out and 170 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: 877 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1461 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 95 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
May 28, 1:16 PM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Crawford, Defiance, Fulton, Hancock and 20 more	119 min
May 28, 1:56 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Ashtabula, Crawford, Cuyahoga, Defiance and 23 more	6 hr
May 28, 4:09 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Columbiana, Crawford, Cuyahoga and 30 more	66 min
May 28, 5:46 PM EDT	Mesoscale Discussion	SPC	Allen, Ashtabula, Auglaize, Crawford, Cuyahoga, Defiance and 25 more	59 min
May 28, 7:39 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Crawford, Cuyahoga and 26 more	96 min

Nearby

Mesoscale Discussions in Kentucky, 2017 Mesoscale Discussions in West Virginia, 2017 Mesoscale Discussions in Ohio, 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.