Alert archive / Kentucky / Tornado Watches in 2020
Tornado Watch 465
The Storm Prediction Center issued this tornado watch at Aug 28, 2020, 1:04 PM CDT for 27 counties in Kentucky; 21 counties in Tennessee. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 28, 2020, 1:04 PM CDT (18:04 UTC)
- Expired
- Aug 28, 2020, 3:47 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 55 kt
All 48 counties
Adair County, KY, Allen County, KY, Barren County, KY, Breckinridge County, KY, Butler County, KY, Clinton County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Larue County, KY, Logan County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Warren County, KY, Bedford County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Grundy County, TN, Jackson County, TN, Macon County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 37 km from the middle of the area, began a volume at 18:05 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 1:22 PM CDT | Severe Thunderstorm Warning | OHX | Davidson, Rutherford, Sumner, Williamson, Wilson | 38 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 6.1 hours before the alert went out and 49 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
- 598 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 737 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:47 AM CDT | Mesoscale Discussion | SPC | Carlisle, Fulton, Graves, Hickman | 88 min |
| Aug 28, 1:25 PM CDT | Mesoscale Discussion | SPC | Allen, Barren, Butler, Edmonson, Grayson, Hancock and 3 more | 65 min |
| Aug 27, 8:29 PM CDT | Mesoscale Discussion | SPC | Dyer, Fayette, Lake, Lauderdale, Shelby, Tipton | 2 hr |
| Aug 28, 10:09 AM CDT | Mesoscale Discussion | SPC | Decatur, Dickson, Hardin, Hickman, Humphreys, Lawrence and 5 more | 96 min |
| Aug 28, 10:31 AM CDT | Tornado Watch | SPC | Cheatham, Davidson, Decatur, Dickson, Giles, Hardin and 13 more | 5 hr |
| Aug 28, 3:46 PM CDT | Tornado Watch | SPC | Bedford, Coffee, Franklin, Giles, Lawrence, Lincoln and 3 more | 4 hr |
| Aug 28, 5:19 PM CDT | Mesoscale Discussion | SPC | Franklin, Grundy, Hamilton, Lincoln, Marion, Moore | 116 min |
| Aug 28, 6:50 PM CDT | Mesoscale Discussion | SPC | Johnson | 2 hr |
Nearby
Tornado Watches in Kentucky, 2020Tornado Watches in Tennessee, 2020Every tornado watch in 2020
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.