Alert archive / Tennessee / Tornado Watches in 2022

Tornado Watch 3

January 1, 202220 counties in Kentucky; 36 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Jan 1, 2022, 10:50 AM CST for 20 counties in Kentucky; 36 counties in Tennessee. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jan 1, 2022, 10:50 AM CST (16:50 UTC)
Expired
Jan 1, 2022, 6:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
65 kt
All 56 counties

Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Casey County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Green County, KY, Hart County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Marion County, KY, Metcalfe County, KY, Monroe County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Warren County, KY, Bedford County, TN, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Fayette County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 45 km from the middle of the area, began a volume at 16:51 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
40%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
40%
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
80%

Warnings issued inside it

33 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 1, 11:00 AM CSTSevere Thunderstorm WarningLMKEdmonson15 min
Jan 1, 11:08 AM CSTTornado WarningLMKEdmonson, Hart22 min
Jan 1, 11:10 AM CSTSevere Thunderstorm WarningOHXMontgomery, Robertson35 min
Jan 1, 11:18 AM CSTSevere Thunderstorm WarningLMKLogan27 min
Jan 1, 11:21 AM CSTSevere Thunderstorm WarningMEGBenton24 min
Jan 1, 11:24 AM CSTTornado WarningLMKLogan, Simpson21 min
Jan 1, 11:30 AM CSTSevere Thunderstorm WarningOHXHouston, Humphreys30 min
Jan 1, 11:39 AM CSTTornado WarningLMKLogan, Simpson, Warren36 min
Jan 1, 11:43 AM CSTTornado WarningLMKLogan, Simpson, Warren32 min
Jan 1, 11:45 AM CSTSevere Thunderstorm Warning Considerable damage threatMEGChester, Decatur, Henderson, Madison45 min
Jan 1, 11:46 AM CSTSevere Thunderstorm Warning Considerable damage threatLMKMarion, Washington14 min
Jan 1, 11:59 AM CSTSevere Thunderstorm WarningOHXHickman, Perry31 min
Jan 1, 12:08 PM CSTTornado WarningLMKMarion, Taylor22 min
Jan 1, 12:08 PM CSTTornado WarningLMKBarren, Edmonson, Green, Hart, Metcalfe37 min
Jan 1, 12:14 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKGreen, Taylor16 min
Jan 1, 12:18 PM CSTSevere Thunderstorm WarningOHXHickman, Humphreys, Perry27 min
Jan 1, 12:28 PM CSTTornado WarningOHXDickson, Hickman, Humphreys19 min
Jan 1, 12:30 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKBarren, Metcalfe30 min
Jan 1, 12:43 PM CSTSevere Thunderstorm WarningOHXHickman, Maury, Williamson47 min
Jan 1, 12:46 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKAdair, Casey, Green, Marion, Taylor29 min
Jan 1, 12:52 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKAdair, Green, Metcalfe23 min
Jan 1, 12:56 PM CSTTornado WarningOHXHickman, Maury, Williamson16 min
Jan 1, 1:02 PM CSTSevere Thunderstorm WarningOHXClay, Davidson, Macon, Rutherford, Smith, Sumner and 3 more43 min
Jan 1, 1:08 PM CSTSevere Thunderstorm WarningLMKAllen, Monroe37 min
Jan 1, 1:29 PM CSTSevere Thunderstorm WarningOHXClay, Jackson, Macon, Smith, Wilson31 min
Jan 1, 1:34 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKClinton, Cumberland, Metcalfe, Monroe26 min
Jan 1, 1:53 PM CSTSevere Thunderstorm Warning Considerable damage threatLMKClinton, Cumberland, Russell37 min
Jan 1, 2:07 PM CSTSevere Thunderstorm WarningOHXGiles, Marshall23 min
Jan 1, 2:25 PM CSTSevere Thunderstorm WarningOHXClay, Fentress, Overton, Pickett35 min
Jan 1, 2:53 PM CSTSevere Thunderstorm WarningOHXBedford, Coffee26 min
Jan 1, 4:11 PM CSTSevere Thunderstorm WarningOHXGiles19 min
Jan 1, 4:14 PM CSTTornado WarningOHXGiles16 min
Jan 1, 5:08 PM CSTSevere Thunderstorm WarningOHXBedford, Coffee, Grundy, Warren37 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, 4.8 hours before the alert went out and 57 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2022-01-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 379 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2022-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
379 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
791 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
245 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted.

802 
WWUS20 KWNS 011648
SEL3  
SPC WW 011648
KYZ000-TNZ000-020000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 3
NWS Storm Prediction Center Norman OK
1050 AM CST Sat Jan 1 2022

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  South-central Kentucky
  Western to middle Tennessee

* Effective this Saturday morning and evening from 1050 AM until
  600 PM CST.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible

SUMMARY...An intensifying squall line should spread east-northeast
with a threat for damaging winds and embedded tornadoes. A couple
pre-frontal supercells may develop as well with the possibility of a
strong tornado.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 90 miles east northeast of Bowling
Green KY to 35 miles south southeast of Jackson TN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU3).

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.

&&

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1 inch. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 400. Mean
storm motion vector 24045.

...Grams

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 31, 9:31 PM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 67 more2 hr
Dec 31, 11:57 PM CSTTornado WatchSPCAdair, Allen, Barren, Butler, Calloway, Carlisle and 33 more7 hr
Jan 1, 2:07 AM CSTMesoscale DiscussionSPCAllen, Barren, Butler, Calloway, Christian, Cumberland and 9 more113 min
Jan 1, 10:29 AM CSTMesoscale DiscussionSPCAdair, Allen, Barren, Butler, Casey, Edmonson and 10 more61 min
Jan 1, 12:38 PM CSTMesoscale DiscussionSPCAdair, Casey, Clay, Clinton, Cumberland, Estill and 17 more97 min
Jan 1, 12:56 PM CSTTornado WatchSPCBell, Breathitt, Clay, Harlan, Jackson, Knott and 12 more6 hr
Jan 1, 1:57 PM CSTMesoscale DiscussionSPCBedford, Giles, Hardin, Lawrence, Lincoln, Marshall and 2 more93 min
Jan 1, 3:27 PM CSTMesoscale DiscussionSPCAnderson, Bledsoe, Campbell, Coffee, Cumberland, Franklin and 14 more93 min
Jan 1, 5:53 PM CSTMesoscale DiscussionSPCAnderson, Bledsoe, Blount, Bradley, Cumberland, Franklin and 19 more67 min

Nearby

Tornado Watches in Tennessee, 2022Tornado Watches in Kentucky, 2022Every tornado watch in 2022

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.