Alert archive / Tennessee / Tornado Watches in 2023
Tornado Watch 102
The Storm Prediction Center issued this tornado watch at Apr 1, 2023, 2:49 AM EDT for 11 counties in Kentucky; 21 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 1, 2023, 2:49 AM EDT (06:49 UTC)
- Expired
- Apr 1, 2023, 7:00 AM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 65 kt
All 32 counties
Bell County, KY, Clay County, KY, Jackson County, KY, Knox County, KY, Laurel County, KY, McCreary County, KY, Owsley County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY, Whitley 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, 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), 64 km from the middle of the area, began a volume at 06:53 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
- 30%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 2:50 AM EDT | Severe Thunderstorm Warning | JKL | McCreary, Pulaski, Wayne, Whitley | 25 min |
| Apr 1, 3:09 AM EDT | Tornado Warning | JKL | Knox, Laurel, McCreary, Wayne, Whitley | 36 min |
| Apr 1, 3:31 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Sequatchie | 44 min |
| Apr 1, 3:45 AM EDT | Tornado Warning | JKL | Clay, Knox, Laurel | 30 min |
| Apr 1, 4:00 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Morgan, Scott | 15 min |
| Apr 1, 4:03 AM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea, Roane | 25 min |
| Apr 1, 4:08 AM EDT | Tornado Warning | JKL | Clay, Leslie, Letcher, Perry | 37 min |
| Apr 1, 4:09 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Blount, Campbell, Grainger, Jefferson, Knox and 5 more | 36 min |
| Apr 1, 4:27 AM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Knox, Loudon, Morgan, Roane | 33 min |
| Apr 1, 4:35 AM EDT | Tornado Warning | MRX | Anderson, Knox, Loudon, Morgan, Roane | 25 min |
| Apr 1, 5:33 AM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Marion, Meigs, Sequatchie | 42 min |
| Apr 1, 5:50 AM EDT | Severe Thunderstorm Warning | MRX | Blount, Cocke, Greene, Jefferson, Sevier | 40 min |
| Apr 1, 5:50 AM EDT | Tornado Warning | MRX | Bradley, Hamilton, McMinn, Polk | 40 min |
| Apr 1, 6:15 AM EDT | Severe Thunderstorm Warning | MRX | Blount, Loudon, McMinn, Monroe | 30 min |
| Apr 1, 6:16 AM EDT | Tornado Warning | MRX | Bradley, McMinn, Monroe, Polk | 44 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 00:00Z, 6.8 hours before the alert went out and 230 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1143 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 388 m²/s²
- 0-3 km storm-relative helicity
- 532 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 31, 10:31 PM EDT | Mesoscale Discussion | SPC | Breckinridge, Daviess, Hancock, Henderson, Jefferson, McLean and 2 more | 119 min |
| Mar 31, 11:09 PM EDT | Tornado Watch | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 3 more | 4 hr |
| Apr 1, 12:20 AM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Boyle, Breckinridge and 31 more | 115 min |
| Mar 31, 9:49 PM EDT | Mesoscale Discussion | SPC | Chester, Hardeman, Henderson, McNairy | 116 min |
| Mar 31, 10:52 PM EDT | Mesoscale Discussion | SPC | Benton, Carroll, Chester, Crockett, Decatur, Fayette and 16 more | 113 min |
| Apr 1, 12:59 AM EDT | Tornado Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 35 more | 6 hr |
| Apr 1, 2:13 AM EDT | Mesoscale Discussion | SPC | Bedford, Cannon, Coffee, Cumberland, DeKalb, Franklin and 18 more | 92 min |
| Apr 1, 4:46 AM EDT | Mesoscale Discussion | SPC | Anderson, Bledsoe, Bradley, Franklin, Grundy, Hamilton and 13 more | 89 min |
Nearby
Tornado Watches in Tennessee, 2023Tornado Watches in Kentucky, 2023Every tornado 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.