Alert archive / Tennessee / Tornado Watches in 2022

Tornado Watch 7

January 1, 20224 states

The Storm Prediction Center issued this tornado watch at Jan 1, 2022, 6:53 PM CST for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jan 1, 2022, 6:53 PM CST (00:53 UTC)
Expired
Jan 2, 2022, 2:00 AM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 48 counties

Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Fannin County, GA, Gilmer County, GA, Gordon County, GA, Murray County, GA, Pickens County, GA, Towns County, GA, Union County, GA, Walker County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Graham County, NC, Swain County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Franklin County, TN, Grainger County, TN, Hamilton County, TN, Jefferson County, TN, Knox County, TN, Lincoln County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Moore County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN, Union County, TN

The radar

The Northeast Alabama radar (KHTX), 23 km from the middle of the area, began a volume at 00:53 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
50%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
20%
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
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 1, 6:55 PM CSTSevere Thunderstorm WarningHUNLawrence, Limestone, Madison, Marshall, Morgan50 min
Jan 1, 6:57 PM CSTSevere Thunderstorm WarningHUNFranklin18 min
Jan 1, 7:20 PM CSTTornado WarningHUNLimestone, Madison, Morgan25 min
Jan 1, 7:40 PM CSTSevere Thunderstorm WarningHUNJackson, Madison50 min
Jan 1, 8:25 PM CSTSevere Thunderstorm WarningHUNDeKalb, Jackson50 min
Jan 1, 8:29 PM CSTTornado WarningHUNJackson31 min
Jan 1, 8:38 PM CSTTornado WarningHUNDeKalb, Jackson26 min
Jan 1, 8:46 PM CSTSevere Thunderstorm WarningFFCCatoosa, Dade, Walker44 min
Jan 1, 8:52 PM CSTTornado WarningFFCDade, Walker8 min
Jan 1, 8:55 PM CSTSevere Thunderstorm WarningMRXBradley, Hamilton, Marion50 min
Jan 1, 9:03 PM CSTFlash Flood WarningHUNMadison3 hr
Jan 1, 9:42 PM CSTFlash Flood WarningHUNMadison3 hr
Jan 1, 10:40 PM CSTFlash Flood WarningHUNJackson, Madison, Morgan2 hr
Jan 2, 12:02 AM CSTFlash Flood WarningHUNMadison5 hr
Jan 2, 12:22 AM CSTFlash Flood WarningHUNJackson, Madison3 hr
Jan 2, 1:11 AM CSTFlash Flood WarningHUNDeKalb3 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

Nashville Metro, TN (KBNA), launched 00:00Z, 0.9 hours before the alert went out and 133 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 00:00Z on 2022-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2022-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -302 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
702 m above ground
0-6 km bulk shear
89 kt
0-1 km storm-relative helicity
-302 m²/s²
0-3 km storm-relative helicity
-54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

028 
WWUS20 KWNS 020051
SEL7  
SPC WW 020051
ALZ000-GAZ000-NCZ000-TNZ000-020800-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 7
NWS Storm Prediction Center Norman OK
750 PM EST Sat Jan 1 2022

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northern Alabama
  Northern Georgia
  Western North Carolina
  Eastern Tennessee

* Effective this Saturday night and Sunday morning from 750 PM
  until 300 AM EST.

* Primary threats include...
  A few tornadoes and a couple intense tornadoes possible
  Scattered damaging wind gusts to 70 mph likely

SUMMARY...Clusters of severe storms including some
embedded/semi-discrete supercells will continue to quickly spread
east-northeastward across the region through the late evening and
early overnight hours. A seasonably moist and modestly unstable
environment will support a damaging wind/tornado risk in the
presence of strengthening low/mid-level winds, which will support
rotating storms.

The tornado watch area is approximately along and 45 statute miles
north and south of a line from 50 miles west southwest of Huntsville
AL to 35 miles east of Knoxville TN. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU7).

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 4...WW 5...WW 6...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1 inch. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 25045.

...Guyer

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 1, 6:02 PM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 19 more118 min
Jan 1, 8:30 PM CSTMesoscale DiscussionSPCJackson60 min
Jan 1, 9:11 PM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 17 more64 min
Jan 1, 10:07 PM CSTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more6 hr
Jan 1, 11:19 PM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Chilton, Choctaw and 17 more116 min
Jan 2, 2:19 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Choctaw and 17 more116 min
Jan 2, 10:37 AM CSTMesoscale DiscussionSPCCoffee, Covington, Dale, Geneva, Henry, Houston83 min
Jan 2, 12:53 PM CSTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
Jan 2, 1:17 PM CSTTornado WatchSPCGeneva, Henry, Houston9 hr
Jan 2, 2:48 PM CSTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 32 more117 min
Jan 2, 3:50 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 33 more85 min
Jan 2, 4:01 PM CSTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more5 hr
Jan 2, 5:52 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 32 more113 min

Nearby

Tornado Watches in Tennessee, 2022Tornado Watches in Georgia, 2022Tornado Watches in Alabama, 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.