Alert archive / Kentucky / Mesoscale Discussions in 2025
Mesoscale Discussion 902
The Storm Prediction Center issued this mesoscale discussion at May 20, 2025, 10:19 AM CDT for 4 counties in Alabama; 52 counties in Kentucky; 34 counties in Tennessee. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2025, 10:19 AM CDT (15:19 UTC)
- Expired
- May 20, 2025, 12:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 90 counties
Colbert County, AL, Lauderdale County, AL, Limestone County, AL, Madison County, AL, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Bath County, KY, Bell County, KY, Bourbon County, KY, Boyle County, KY, Breathitt County, KY, Casey County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Garrard County, KY, Green County, KY, Hart County, KY, Jackson County, KY, Jessamine County, KY, Knox County, KY, Larue 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, Metcalfe County, KY, Monroe County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Scott County, KY, Taylor County, KY, Washington County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Woodford County, KY, Bedford County, TN, Bledsoe County, TN, Campbell County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lawrence County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Scott County, TN, Sequatchie County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 94 km from the middle of the area, began a volume at 15:21 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, 3.3 hours before the alert went out and 102 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
- 1162 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 904 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 3.9
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 1:48 PM CDT | Mesoscale Discussion | SPC | Blount, Colbert, Cullman, DeKalb, Etowah, Fayette and 14 more | 117 min |
| May 20, 2:36 PM CDT | Tornado Watch | SPC | Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more | 8 hr |
| May 20, 3:33 PM CDT | Mesoscale Discussion | SPC | Colbert, Lauderdale | 117 min |
| May 20, 5:08 PM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Calhoun, Chilton, Clay and 20 more | 2 hr |
| May 20, 5:47 PM CDT | Mesoscale Discussion | SPC | Colbert, Lauderdale, Lawrence, Limestone, Madison | 118 min |
| May 20, 6:46 PM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 16 more | 7 hr |
| May 19, 7:02 PM CDT | Mesoscale Discussion | SPC | Logan, Simpson, Todd | 88 min |
| May 20, 1:07 AM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Carlisle, Christian, Crittenden, Daviess and 16 more | 83 min |
| May 20, 2:15 AM CDT | Tornado Watch | SPC | Ballard, Caldwell, Carlisle, Crittenden, Daviess, Hancock and 11 more | 4 hr |
| May 20, 12:10 PM CDT | Tornado Watch | SPC | Bath, Bell, Bourbon, Boyd, Breathitt, Carter and 39 more | 5 hr |
| May 20, 1:09 PM CDT | Tornado Watch | SPC | Ballard, Calloway, Carlisle, Fulton, Graves, Hickman and 3 more | 8 hr |
| May 20, 2:42 PM CDT | Mesoscale Discussion | SPC | Floyd, Harlan, Johnson, Knott, Lawrence, Letcher and 3 more | 2 hr |
| May 20, 5:13 PM CDT | Mesoscale Discussion | SPC | Bell, Boyle, Breathitt, Clark, Clay, Estill and 25 more | 62 min |
| May 20, 6:27 PM CDT | Tornado Watch | SPC | Bell, Breathitt, Clay, Estill, Harlan, Jackson and 15 more | 6 hr |
| May 20, 12:34 PM CDT | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Haywood, Lake, Lauderdale and 2 more | 116 min |
Nearby
Mesoscale Discussions in Kentucky, 2025Mesoscale Discussions in Tennessee, 2025Mesoscale Discussions in Alabama, 2025Every mesoscale discussion in 2025
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.