Alert archive / Kentucky / Severe Thunderstorm Watches in 2023
Severe Thunderstorm Watch 511
The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2023, 1:09 PM CDT for 49 counties in Kentucky; 38 counties in Tennessee. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2023, 1:09 PM CDT (18:09 UTC)
- Expired
- Jul 18, 2023, 8:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 65 kt
All 87 counties
Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Casey County, KY, Christian 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, Harlan County, KY, Hart County, KY, Henderson County, KY, Hopkins County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, McCreary County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Union County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Webster County, KY, Whitley County, KY, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 66 km from the middle of the area, began a volume at 18:10 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 1:33 PM CDT | Severe Thunderstorm Warning | LMK | Adair, Casey, Lincoln | 42 min |
| Jul 18, 1:45 PM CDT | Severe Thunderstorm Warning | PAH | Caldwell, Christian, Crittenden, Hopkins, Lyon, Trigg and 1 more | 60 min |
| Jul 18, 1:51 PM CDT | Severe Thunderstorm Warning | OHX | Dickson, Houston, Humphreys, Montgomery, Stewart | 54 min |
| Jul 18, 2:22 PM CDT | Severe Thunderstorm Warning | PAH | Christian, Hopkins, Muhlenberg, Todd | 68 min |
| Jul 18, 2:32 PM CDT | Severe Thunderstorm Warning | JKL | Estill, Jackson, Lee, Owsley, Rockcastle | 43 min |
| Jul 18, 2:35 PM CDT | Severe Thunderstorm Warning | LMK | Butler, Logan | 55 min |
| Jul 18, 2:40 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson and 1 more | 65 min |
| Jul 18, 3:12 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Dickson, Hickman, Humphreys, Lewis, Maury and 2 more | 63 min |
| Jul 18, 3:13 PM CDT | Severe Thunderstorm Warning | LMK | Larue, Marion, Taylor | 17 min |
| Jul 18, 3:15 PM CDT | Severe Thunderstorm Warning | LMK | Allen, Butler, Edmonson, Logan, Simpson, Warren | 60 min |
| Jul 18, 3:21 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Robertson, Rutherford, Sumner, Williamson and 1 more | 54 min |
| Jul 18, 3:52 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Lewis, Maury, Wayne | 68 min |
| Jul 18, 4:11 PM CDT | Severe Thunderstorm Warning | OHX | Bedford, Davidson, Lewis, Marshall, Maury, Rutherford and 1 more | 49 min |
| Jul 18, 4:13 PM CDT | Severe Thunderstorm Warning | OHX | Cannon, Davidson, DeKalb, Macon, Rutherford, Smith and 3 more | 47 min |
| Jul 18, 4:42 PM CDT | Severe Thunderstorm Warning | LMK | Marion, Washington | 18 min |
| Jul 18, 4:56 PM CDT | Severe Thunderstorm Warning | OHX | Bedford, Coffee, Giles, Grundy, Lawrence, Marshall and 1 more | 18 min |
| Jul 18, 5:00 PM CDT | Severe Thunderstorm Warning | OHX | Cannon, Coffee, DeKalb, Grundy, Putnam, Rutherford and 5 more | 45 min |
| Jul 18, 5:42 PM CDT | Severe Thunderstorm Warning | LMK | Bullitt, Jefferson | 18 min |
| Jul 18, 6:01 PM CDT | Flash Flood Warning | LMK | Marion, Nelson, Washington | 3 hr |
| Jul 18, 6:52 PM CDT | Severe Thunderstorm Warning | OHX | Wayne | 38 min |
| Jul 18, 7:36 PM CDT | Severe Thunderstorm Warning | JKL | Clay, Jackson, Laurel, Owsley | 24 min |
| Jul 18, 7:38 PM CDT | Severe Thunderstorm Warning | JKL | Estill, Jackson, Laurel, Lee, Owsley, Rockcastle | 24 min |
| Jul 18, 8:00 PM CDT | Severe Thunderstorm Warning | JKL | Breathitt, Clay, Jackson, Laurel, Lee, Leslie and 3 more | 28 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, 6.2 hours before the alert went out and 75 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
- 2404 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 897 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 8:15 PM CDT | Mesoscale Discussion | SPC | Bath, Boyd, Carter, Elliott, Fleming, Greenup and 6 more | 90 min |
| Jul 17, 8:37 PM CDT | Severe Thunderstorm Watch | SPC | Boyd, Carter, Greenup, Lawrence, Lewis | 4 hr |
| Jul 17, 9:24 PM CDT | Mesoscale Discussion | SPC | Butler, Caldwell, Christian, Hopkins, Logan, Lyon and 7 more | 96 min |
| Jul 18, 8:42 AM CDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 10 more | 93 min |
| Jul 18, 8:59 AM CDT | Severe Thunderstorm Watch | SPC | Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 6 more | 8 hr |
| Jul 18, 12:23 PM CDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more | 97 min |
| Jul 18, 12:48 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Butler, Caldwell, Christian and 22 more | 57 min |
| Jul 18, 3:00 PM CDT | Mesoscale Discussion | SPC | Allen, Barren, Butler, Edmonson, Grayson, Hart and 8 more | 90 min |
| Jul 18, 3:47 PM CDT | Mesoscale Discussion | SPC | Bath, Bourbon, Boyd, Bracken, Breathitt, Campbell and 32 more | 118 min |
| Jul 18, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Bledsoe, Franklin, Hamilton, Lincoln, Marion, Moore and 1 more | 6 hr |
| Jul 18, 4:29 PM CDT | Mesoscale Discussion | SPC | Fayette, Hardeman, Lauderdale, McNairy, Shelby, Tipton | 3 hr |
| Jul 18, 4:39 PM CDT | Severe Thunderstorm Watch | SPC | Chester, Crockett, Fayette, Hardeman, Hardin, Haywood and 5 more | 4 hr |
| Jul 18, 5:46 PM CDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Blount, Bradley, Cumberland, Grundy and 13 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Kentucky, 2023Severe Thunderstorm Watches in Tennessee, 2023Every severe thunderstorm watch in 2023
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.