Alert archive / Tennessee / Tornado Watches in 2020
Tornado Watch 92
The Storm Prediction Center issued this tornado watch at Apr 8, 2020, 7:04 PM CDT for 5 counties in Arkansas; 43 counties in Tennessee. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2020, 7:04 PM CDT (00:04 UTC)
- Expired
- Apr 9, 2020, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 48 counties
Craighead County, AR, Crittenden County, AR, Cross County, AR, Mississippi County, AR, Poinsett County, AR, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Obion County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton County, TN, Trousdale County, TN, Wayne County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN
The radar
The Memphis radar (KNQA), 105 km from the middle of the area, began a volume at 00:06 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
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 7:06 PM CDT | Severe Thunderstorm Warning | MEG | Craighead, Poinsett | 39 min |
| Apr 8, 7:35 PM CDT | Tornado Warning | MEG | Craighead, Poinsett | 25 min |
| Apr 8, 7:53 PM CDT | Tornado Warning | MEG | Craighead, Poinsett | 52 min |
| Apr 8, 7:57 PM CDT | Severe Thunderstorm Warning | MEG | Craighead, Poinsett | 48 min |
| Apr 8, 7:58 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Henry | 47 min |
| Apr 8, 8:13 PM CDT | Severe Thunderstorm Warning | OHX | Houston, Montgomery, Stewart | 47 min |
| Apr 8, 8:33 PM CDT | Severe Thunderstorm Warning | MEG | Crockett, Dyer, Gibson, Haywood, Lauderdale | 42 min |
| Apr 8, 8:36 PM CDT | Tornado Warning | MEG | Crittenden, Cross, Poinsett | 26 min |
| Apr 8, 8:37 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Henry, Weakley | 38 min |
| Apr 8, 8:57 PM CDT | Severe Thunderstorm Warning | OHX | Dickson, Houston, Montgomery, Robertson, Stewart | 33 min |
| Apr 8, 9:00 PM CDT | Severe Thunderstorm Warning | MEG | Crittenden, Mississippi, Poinsett | 45 min |
| Apr 8, 9:04 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Carroll, Henry | 41 min |
| Apr 8, 9:11 PM CDT | Severe Thunderstorm Warning | OHX | Houston, Humphreys, Stewart | 34 min |
| Apr 8, 9:17 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Montgomery, Robertson | 28 min |
| Apr 8, 9:36 PM CDT | Severe Thunderstorm Warning | MEG | Crittenden | 39 min |
| Apr 8, 9:36 PM CDT | Severe Thunderstorm Warning | OHX | Davidson, Macon, Robertson, Sumner, Wilson | 39 min |
| Apr 8, 9:41 PM CDT | Severe Thunderstorm Warning | OHX | Cheatham, Davidson, Dickson, Williamson, Wilson | 34 min |
| Apr 8, 10:09 PM CDT | Severe Thunderstorm Warning | OHX | DeKalb, Jackson, Macon, Smith, Sumner, Trousdale and 1 more | 36 min |
| Apr 8, 10:12 PM CDT | Severe Thunderstorm Warning | MEG | Clay, Greene, Mississippi | 48 min |
| Apr 8, 10:14 PM CDT | Severe Thunderstorm Warning | OHX | Davidson, Rutherford, Wilson | 46 min |
| Apr 8, 10:17 PM CDT | Severe Thunderstorm Warning | MEG | Fayette, Shelby | 28 min |
| Apr 8, 10:43 PM CDT | Severe Thunderstorm Warning | OHX | Cannon, DeKalb, Rutherford, Smith, Warren, Wilson | 47 min |
| Apr 8, 10:46 PM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman | 44 min |
| Apr 8, 10:48 PM CDT | Severe Thunderstorm Warning | MEG | Mississippi | 42 min |
| Apr 8, 10:54 PM CDT | Severe Thunderstorm Warning | MEG | Craighead, Mississippi | 51 min |
| Apr 8, 11:38 PM CDT | Severe Thunderstorm Warning | MEG | Mississippi | 52 min |
| Apr 9, 12:31 AM CDT | Severe Thunderstorm Warning | MEG | Hardin, McNairy | 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
Little Rock, AR (KLZK), launched 00:00Z, 0.1 hours before the alert went out and 151 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
- 1810 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1529 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 8.3
The text
As transmitted.
473
WWUS20 KWNS 090003
SEL2
SPC WW 090003
ARZ000-TNZ000-090700-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 92
NWS Storm Prediction Center Norman OK
705 PM CDT Wed Apr 8 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast Arkansas
Western and Middle Tennessee
* Effective this Wednesday night and Thursday morning from 705 PM
until 200 AM CDT.
* Primary threats include...
A few tornadoes likely
Widespread large hail and isolated very large hail events to 2.5
inches in diameter likely
Widespread damaging wind gusts to 70 mph likely
SUMMARY...A broken line of thunderstorms currently extending from
northern Arkansas into southeast Missouri will sag southeastward
into the watch area this evening. Large hail and damaging wind
gusts will be possible in the stronger cells, along with an
increasing risk of a few tornadoes after dark.
The tornado watch area is approximately along and 45 statute miles
north and south of a line from 25 miles southwest of Jonesboro AR to
40 miles east of Nashville TN. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 88...WW 89...WW 90...WW
91...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 28035.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 7:46 PM CDT | Mesoscale Discussion | SPC | Anderson, Ballard, Boone, Bourbon, Boyle, Bracken and 61 more | 119 min |
| Apr 8, 9:14 PM CDT | Mesoscale Discussion | SPC | Bath, Boyd, Breathitt, Carter, Clay, Elliott and 30 more | 3 hr |
| Apr 8, 9:51 PM CDT | Tornado Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 31 more | 5 hr |
| Apr 8, 9:52 PM CDT | Mesoscale Discussion | SPC | Anderson, Bedford, Bledsoe, Blount, Bradley, Cannon and 32 more | 113 min |
| Apr 8, 10:16 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bedford, Bledsoe, Blount, Bradley, Campbell and 46 more | 6 hr |
Nearby
Tornado Watches in Tennessee, 2020Tornado Watches in Arkansas, 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.