Alert archive / Kentucky / Mesoscale Discussions in 2017

Mesoscale Discussion 835

May 24, 201712 counties in Kentucky; 5 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at May 24, 2017, 6:51 PM EDT for 12 counties in Kentucky; 5 counties in Virginia. It was in force for 24 min.

The area

The outline as issued.

The facts

Issued: May 24, 2017, 6:51 PM EDT (22:51 UTC)
Expired: May 24, 2017, 7:15 PM EDT
In force: 24 min
Issued by: the Storm Prediction Center

Counties Carter County, KY, Elliott County, KY, Floyd County, KY, Johnson County, KY, Knott County, KY, Lawrence County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Morgan County, KY, Pike County, KY, Rowan County, KY, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Scott County, VA, Wise County, VA

The radar

The Jackson,KY radar (KJKL), 26 km from the middle of the area, began a volume at 22:54 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, 10.9 hours before the alert went out and 218 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: 10 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 80 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 24, 7:41 AM EDT	Mesoscale Discussion	SPC	Bell, Clay, Harlan, Jackson, Knox, Laurel and 7 more	3 hr
May 24, 11:47 AM EDT	Mesoscale Discussion	SPC	Boone, Campbell, Kenton	58 min
May 24, 12:47 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Barren, Casey, Clinton, Cumberland and 11 more	58 min
May 24, 1:19 PM EDT	Tornado Watch	SPC	Adair, Anderson, Bath, Bell, Bourbon, Boyle and 51 more	7 hr
May 24, 3:50 PM EDT	Mesoscale Discussion	SPC	Adair, Anderson, Bath, Bell, Bourbon, Boyle and 53 more	55 min
May 24, 3:13 PM EDT	Mesoscale Discussion	SPC	Carroll, Floyd, Halifax, Henry, Patrick, Pittsylvania and 3 more	2 hr
May 24, 3:46 PM EDT	Tornado Watch	SPC	Carroll, Charlotte, Grayson, Halifax, Henry, Patrick and 4 more	6 hr
May 24, 6:59 PM EDT	Mesoscale Discussion	SPC	Brunswick, Charlotte, Dinwiddie, Greensville, Halifax, Isle of Wight and 9 more	91 min

Nearby

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