Alert archive / Mississippi / Tornado Watches in 2020
Tornado Watch 10
The Storm Prediction Center issued this tornado watch at Jan 11, 2020, 4:17 AM CST for 14 counties in Mississippi; 11 counties in Tennessee. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 11, 2020, 4:17 AM CST (10:17 UTC)
- Expired
- Jan 11, 2020, 10:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 70 kt
All 25 counties
Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Decatur County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Madison County, TN, McNairy County, TN, Weakley County, TN
The radar
The Memphis radar (KNQA), 120 km from the middle of the area, began a volume at 10:21 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
- 20%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 4:22 AM CST | Severe Thunderstorm Warning | MEG | Coahoma, Panola, Quitman, Tallahatchie, Yalobusha | 38 min |
| Jan 11, 4:55 AM CST | Severe Thunderstorm Warning | MEG | Calhoun, Lafayette, Marshall, Panola, Tallahatchie, Tate and 2 more | 50 min |
| Jan 11, 5:13 AM CST | Tornado Warning | MEG | Benton, Lafayette, Marshall, Panola, Tate | 27 min |
| Jan 11, 5:19 AM CST | Severe Thunderstorm Warning | MEG | Calhoun, Lafayette, Marshall, Panola, Pontotoc, Union and 1 more | 41 min |
| Jan 11, 5:21 AM CST | Severe Thunderstorm Warning | MEG | Benton, Marshall | 39 min |
| Jan 11, 5:34 AM CST | Severe Thunderstorm Warning | MEG | Lafayette, Panola, Quitman, Tate | 5 min |
| Jan 11, 5:36 AM CST | Tornado Warning | MEG | Fayette, Hardeman | 24 min |
| Jan 11, 5:37 AM CST | Severe Thunderstorm Warning | MEG | Benton, Marshall, Tippah, Union | 38 min |
| Jan 11, 5:57 AM CST | Severe Thunderstorm Warning | MEG | Benton, Calhoun, Chickasaw, Lafayette, Lee, Marshall and 4 more | 48 min |
| Jan 11, 6:09 AM CST | Severe Thunderstorm Warning | MEG | Alcorn, Benton, Prentiss, Tippah | 51 min |
| Jan 11, 6:19 AM CST | Severe Thunderstorm Warning | MEG | Chester, Hardeman, Hardin, McNairy | 41 min |
| Jan 11, 6:37 AM CST | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Monroe, Pontotoc, Prentiss and 2 more | 38 min |
| Jan 11, 6:38 AM CST | Severe Thunderstorm Warning | MEG | Benton, Carroll, Henry | 37 min |
| Jan 11, 6:41 AM CST | Severe Thunderstorm Warning | MEG | Benton, Chester, Decatur, Hardin, Henderson, McNairy | 47 min |
| Jan 11, 6:56 AM CST | Tornado Warning | MEG | Lee, Prentiss, Tishomingo | 22 min |
| Jan 11, 6:59 AM CST | Severe Thunderstorm Warning | MEG | Alcorn, Prentiss, Tishomingo | 46 min |
| Jan 11, 7:05 AM CST | Tornado Warning | MEG | Alcorn, Prentiss, Tishomingo | 40 min |
| Jan 11, 7:08 AM CST | Severe Thunderstorm Warning | MEG | Chickasaw, Itawamba, Lee, Monroe, Prentiss, Tishomingo | 52 min |
| Jan 11, 7:37 AM CST | Severe Thunderstorm Warning | MEG | Hardin | 23 min |
| Jan 11, 7:40 AM CST | Severe Thunderstorm Warning | MEG | Itawamba, Lee, Monroe | 50 min |
| Jan 11, 9:17 AM CST | Flash Flood Warning | MEG | Calhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc and 1 more | 4 hr |
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, 10.3 hours before the alert went out and 142 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
- 346 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 532 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 341 m²/s²
- 0-3 km storm-relative helicity
- 385 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted.
085
WWUS20 KWNS 111013
SEL0
SPC WW 111013
MSZ000-TNZ000-111600-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 10
NWS Storm Prediction Center Norman OK
415 AM CST Sat Jan 11 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast Mississippi
Western Tennessee
* Effective this Saturday morning from 415 AM until 1000 AM CST.
* Primary threats include...
A couple tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 80 mph possible
SUMMARY...Squall line along the Mississippi River will move east
across northern Mississippi and western Tennessee this morning.
Damaging winds are the primary threat, but a couple tornadoes are
also possible.
The tornado watch area is approximately along and 35 statute miles
east and west of a line from 65 miles north northeast of Jackson TN
to 35 miles south southwest of Tupelo MS. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU0).
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 7...WW 8...WW 9...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24045.
...GramsSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 10, 11:58 PM CST | Tornado Watch | SPC | Bolivar, Coahoma, DeSoto, Leflore, Marshall, Panola and 6 more | 7 hr |
| Jan 11, 2:22 AM CST | Mesoscale Discussion | SPC | Adams, Claiborne, Copiah, Franklin, Hinds, Humphreys and 8 more | 53 min |
| Jan 11, 2:37 AM CST | Tornado Watch | SPC | Adams, Attala, Carroll, Choctaw, Claiborne, Copiah and 22 more | 8 hr |
| Jan 11, 3:52 AM CST | Mesoscale Discussion | SPC | Benton, Bolivar, Coahoma, DeSoto, Grenada, Lafayette and 9 more | 83 min |
| Jan 11, 4:31 AM CST | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Copiah, Franklin, Hinds and 11 more | 59 min |
| Jan 11, 5:06 AM CST | Mesoscale Discussion | SPC | Alcorn, Benton, DeSoto, Lafayette, Lee, Marshall and 7 more | 54 min |
| Jan 11, 5:18 AM CST | Tornado Watch | SPC | Amite, Hancock, Pearl River, Pike, Walthall, Wilkinson | 7 hr |
| Jan 11, 7:39 AM CST | Mesoscale Discussion | SPC | Amite, Attala, Choctaw, Clarke, Copiah, Covington and 31 more | 96 min |
| Jan 11, 7:57 AM CST | Tornado Watch | SPC | Clarke, Clay, Covington, Forrest, George, Greene and 20 more | 9 hr |
| Jan 11, 9:54 AM CST | Mesoscale Discussion | SPC | Clarke, Forrest, Greene, Jasper, Jones, Kemper and 10 more | 96 min |
| Jan 11, 6:12 AM CST | Mesoscale Discussion | SPC | Benton, Cheatham, Davidson, Dickson, Giles, Hickman and 14 more | 93 min |
| Jan 11, 6:57 AM CST | Tornado Watch | SPC | Bedford, Cannon, Cheatham, Clay, Coffee, Cumberland and 34 more | 7 hr |
| Jan 11, 8:20 AM CST | Mesoscale Discussion | SPC | Bledsoe, Cannon, Clay, Cumberland, DeKalb, Fentress and 11 more | 55 min |
| Jan 11, 9:28 AM CST | Mesoscale Discussion | SPC | Bedford, Bledsoe, Cannon, Clay, Coffee, Cumberland and 27 more | 92 min |
| Jan 11, 12:20 PM CST | Mesoscale Discussion | SPC | Bledsoe, Bradley, Franklin, Grundy, Hamilton, McMinn and 6 more | 85 min |
| Jan 11, 12:42 PM CST | Tornado Watch | SPC | Anderson, Bledsoe, Blount, Bradley, Coffee, Cumberland and 18 more | 7 hr |
| Jan 11, 3:16 PM CST | Mesoscale Discussion | SPC | Anderson, Blount, Bradley, Jefferson, Knox, Loudon and 9 more | 89 min |
| Jan 11, 5:36 PM CST | Mesoscale Discussion | SPC | Carter, Cocke, Greene, Hamblen, Hancock, Hawkins and 4 more | 84 min |
Nearby
Tornado Watches in Mississippi, 2020Tornado Watches in Tennessee, 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.