Alert archive / Kentucky / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 92
The Storm Prediction Center issued this severe thunderstorm watch at Mar 27, 2017, 6:02 PM EDT for 8 counties in Georgia; 31 counties in Kentucky; 22 counties in Tennessee. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2017, 6:02 PM EDT (22:02 UTC)
- Expired
- Mar 27, 2017, 11:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 61 counties
Catoosa County, GA, Chattooga County, GA, Dade County, GA, Floyd County, GA, Gordon County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA, Bath County, KY, Bell County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Claiborne County, TN, Grainger County, TN, Hamilton County, TN, Hancock County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 101 km from the middle of the area, began a volume at 22:03 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
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 6:27 PM EDT | Severe Thunderstorm Warning | JKL | Laurel, Pulaski, Rockcastle | 33 min |
| Mar 27, 6:43 PM EDT | Severe Thunderstorm Warning | JKL | Wayne | 47 min |
| Mar 27, 6:59 PM EDT | Severe Thunderstorm Warning | JKL | Clay, Jackson, Laurel | 46 min |
| Mar 27, 7:08 PM EDT | Severe Thunderstorm Warning | JKL | Pulaski, Wayne | 22 min |
| Mar 27, 7:34 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Clay, Jackson, Lee, Owsley, Perry | 56 min |
| Mar 27, 7:49 PM EDT | Severe Thunderstorm Warning | JKL | Estill, Jackson, Lee, Montgomery, Powell, Rockcastle | 41 min |
| Mar 27, 7:53 PM EDT | Severe Thunderstorm Warning | FFC | Gilmer, Murray | 37 min |
| Mar 27, 8:06 PM EDT | Severe Thunderstorm Warning | JKL | Clay, Jackson, Laurel, Pulaski, Rockcastle | 24 min |
| Mar 27, 8:23 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Clay, Estill, Jackson, Lee, Owsley and 2 more | 52 min |
| Mar 27, 8:29 PM EDT | Severe Thunderstorm Warning | JKL | Breathitt, Owsley, Perry | 46 min |
| Mar 27, 8:58 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Knox, Sevier | 32 min |
| Mar 27, 9:28 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Greene, Hamblen, Jefferson, Knox, Sevier | 23 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, 10.0 hours before the alert went out and 221 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
- 48 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 1296 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 2:49 PM EDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Coosa and 19 more | 56 min |
| Mar 27, 2:54 PM EDT | Severe Thunderstorm Watch | SPC | Bibb, Blount, Calhoun, Cherokee, Cleburne, Colbert and 25 more | 7 hr |
| Mar 27, 4:33 PM EDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 26 more | 87 min |
| Mar 27, 6:59 PM EDT | Mesoscale Discussion | SPC | Lauderdale | 91 min |
| Mar 27, 5:43 PM EDT | Mesoscale Discussion | SPC | Catoosa | 92 min |
| Mar 27, 12:26 PM EDT | Mesoscale Discussion | SPC | Allen, Ballard, Barren, Butler, Caldwell, Calloway and 18 more | 3 hr |
| Mar 27, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 13 more | 8 hr |
| Mar 27, 2:58 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Barren, Breckinridge, Bullitt, Butler and 30 more | 2 hr |
| Mar 27, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 46 more | 8 hr |
| Mar 27, 4:39 PM EDT | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 13 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Kentucky, 2017Severe Thunderstorm Watches in Tennessee, 2017Severe Thunderstorm Watches in Georgia, 2017Every severe thunderstorm watch in 2017
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.