Alert archive / Tennessee / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 166
The Storm Prediction Center issued this severe thunderstorm watch at May 4, 2020, 6:42 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 4, 2020, 6:42 PM CDT (23:42 UTC)
- Expired
- May 5, 2020, 12:52 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 67 counties
DeKalb County, AL, Jackson County, AL, Lauderdale County, AL, Limestone County, AL, Madison County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Dade County, GA, Dawson County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Gilmer County, GA, Gordon County, GA, Hall County, GA, Jackson County, GA, Lumpkin County, GA, Murray County, GA, Pickens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Bedford County, TN, Bledsoe County, TN, Bradley County, TN, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hamilton County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Perry County, TN, Polk County, TN, Rhea County, TN, Rutherford County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN
The radar
The Northeast Alabama radar (KHTX), 77 km from the middle of the area, began a volume at 23:44 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
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 |
|---|---|---|---|---|
| May 4, 7:25 PM CDT | Severe Thunderstorm Warning | OHX | Perry, Wayne | 50 min |
| May 4, 8:02 PM CDT | Severe Thunderstorm Warning | OHX | Wayne | 43 min |
| May 4, 8:14 PM CDT | Severe Thunderstorm Warning | OHX | Lawrence, Lewis, Maury, Perry, Wayne | 46 min |
| May 4, 8:24 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Wayne | 51 min |
| May 4, 8:26 PM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale, Lawrence, Limestone | 49 min |
| May 4, 8:36 PM CDT | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Marshall, Maury | 54 min |
| May 4, 8:43 PM CDT | Severe Thunderstorm Warning | HUN | Lincoln, Moore | 47 min |
| May 4, 9:22 PM CDT | Severe Thunderstorm Warning | HUN | Jackson, Madison | 38 min |
| May 4, 9:57 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 33 min |
| May 4, 10:03 PM CDT | Severe Thunderstorm Warning | MRX | Marion | 42 min |
| May 4, 10:26 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson | 34 min |
| May 4, 10:29 PM CDT | Severe Thunderstorm Warning | FFC | Catoosa, Chattooga, Dade, Walker, Whitfield | 46 min |
| May 4, 10:50 PM CDT | Severe Thunderstorm Warning | FFC | Chattooga, Floyd | 25 min |
| May 4, 11:09 PM CDT | Severe Thunderstorm Warning | FFC | Bartow, Chattooga, Fannin, Floyd, Gilmer, Gordon and 4 more | 51 min |
| May 5, 12:11 AM CDT | Severe Thunderstorm Warning | FFC | Lumpkin, Union, White | 34 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 6:21 PM CDT | Mesoscale Discussion | SPC | Jackson, Lauderdale, Limestone, Madison | 54 min |
| May 4, 2:02 PM CDT | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 35 more | 118 min |
| May 4, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Carroll, Chester, Crockett, Decatur, Dyer and 15 more | 6 hr |
| May 4, 3:44 PM CDT | Mesoscale Discussion | SPC | Crockett, Dyer, Fayette, Haywood, Lake, Lauderdale and 2 more | 61 min |
Nearby
Severe Thunderstorm Watches in Tennessee, 2020Severe Thunderstorm Watches in Georgia, 2020Severe Thunderstorm Watches in Alabama, 2020Every severe thunderstorm 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; radar from the NEXRAD Level II archive.