Alert archive / Kentucky / Mesoscale Discussions in 2013

Mesoscale Discussion 927

June 1, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2013, 5:05 PM CDT for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2013, 5:05 PM CDT (22:05 UTC)
Expired: Jun 1, 2013, 6:30 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 65 counties

Blount County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Jackson County, AL, Jefferson County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Tuscaloosa County, AL, Walker County, AL, Dade County, GA, Bath County, KY, Bell County, KY, Breathitt County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Estill County, KY, Garrard County, KY, Jackson County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lincoln County, KY, Madison County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Owsley County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Anderson County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Marion County, TN, Meigs County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Northeast Alabama radar (KHTX), 77 km from the middle of the area, began a volume at 22:07 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

Nashville Metro, TN (KBNA), launched 12:00Z, 10.1 hours before the alert went out and 107 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: 878 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 816 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 9:37 PM CDT	Tornado Watch	SPC	Ballard, Crittenden, Daviess, Henderson, Livingston, McCracken and 3 more	6 hr
Jun 1, 1:13 AM CDT	Mesoscale Discussion	SPC	Oldham, Trimble	2 hr
Jun 1, 1:51 AM CDT	Mesoscale Discussion	SPC	Union	114 min
Jun 1, 3:46 AM CDT	Mesoscale Discussion	SPC	Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 15 more	29 min
Jun 1, 1:24 PM CDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bath, Boone and 61 more	96 min
Jun 1, 9:53 AM CDT	Mesoscale Discussion	SPC	Crockett, Dyer, Fayette, Gibson, Hardeman, Haywood and 4 more	2 hr

Nearby

Mesoscale Discussions in Kentucky, 2013 Mesoscale Discussions in Tennessee, 2013 Mesoscale Discussions in Alabama, 2013 Every mesoscale discussion in 2013

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.