Alert archive / Kentucky / Mesoscale Discussions in 2013
Mesoscale Discussion 754
The Storm Prediction Center issued this mesoscale discussion at May 21, 2013, 2:12 PM CDT for 42 counties in Kentucky; 21 counties in Tennessee. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2013, 2:12 PM CDT (19:12 UTC)
- Expired
- May 21, 2013, 3:15 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 63 counties
Adair County, KY, Anderson County, KY, Bell County, KY, Boyle County, KY, Breathitt County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Estill County, KY, Fayette County, KY, Garrard County, KY, Green County, KY, Harlan County, KY, Jackson County, KY, Jessamine County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, McCreary County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Anderson County, TN, Bledsoe County, TN, Campbell County, TN, Claiborne County, TN, Clay County, TN, Cumberland County, TN, Fentress County, TN, Grainger County, TN, Knox County, TN, Loudon County, TN, Meigs County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Union County, TN, Van Buren County, TN, White County, TN
The radar
The Knoxville radar (KMRX), 109 km from the middle of the area, began a volume at 19:14 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 7.2 hours before the alert went out and 225 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.
- Mixed-layer CAPE
- 2248 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 675 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 10:25 PM CDT | Mesoscale Discussion | SPC | Ballard, Carlisle, Fulton, Graves, Hickman, Livingston and 2 more | 65 min |
| May 20, 10:56 PM CDT | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 9 more | 6 hr |
| May 21, 2:59 AM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Crittenden, Graves and 8 more | 91 min |
| May 21, 7:47 AM CDT | Mesoscale Discussion | SPC | Fulton | 58 min |
| May 21, 11:27 AM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Clinton, Cumberland, Logan and 7 more | 63 min |
| May 21, 2:26 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Anderson, Bath, Bell, Bourbon, Boyd and 55 more | 7 hr |
| May 21, 6:00 PM CDT | Mesoscale Discussion | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 22 more | 60 min |
| May 21, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | Crockett, Dyer, Fayette, Gibson, Haywood, Lake and 5 more | 3 hr |
| May 21, 2:42 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 14 more | 63 min |
| May 21, 3:00 PM CDT | Tornado Watch | SPC | Carroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more | 7 hr |
| May 21, 6:23 PM CDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Fayette and 13 more | 67 min |
Nearby
Mesoscale Discussions in Kentucky, 2013Mesoscale Discussions in Tennessee, 2013Every 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.