Alert archive / Georgia / Tornado Watches in 2020

Tornado Watch 16

January 11, 20205 counties in Alabama; 10 counties in Florida; 15 counties in Georgia

The Storm Prediction Center issued this tornado watch at Jan 11, 2020, 2:44 PM CST for 5 counties in Alabama; 10 counties in Florida; 15 counties in Georgia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jan 11, 2020, 2:44 PM CST (20:44 UTC)
Expired
Jan 11, 2020, 8:00 PM CST
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
0.5 in
Strongest gust expected
60 kt
All 30 counties

Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Worth County, GA

The radar

The Ft Rucker radar (KEOX), 63 km from the middle of the area, began a volume at 20:44 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
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
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
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 11, 2:49 PM CSTSevere Thunderstorm WarningTAECoffee, Dale, Geneva86 min
Jan 11, 3:12 PM CSTSevere Thunderstorm WarningTAEWalton63 min
Jan 11, 4:00 PM CSTSevere Thunderstorm WarningTAEHolmes, Walton60 min
Jan 11, 4:04 PM CSTSevere Thunderstorm WarningTAECoffee, Dale, Geneva, Henry, Houston71 min
Jan 11, 4:38 PM CSTSevere Thunderstorm WarningTAEHenry79 min
Jan 11, 4:38 PM CSTSevere Thunderstorm WarningTAEBay, Holmes, Jackson, Walton, Washington67 min
Jan 11, 4:45 PM CSTSevere Thunderstorm WarningTAEGeneva, Houston73 min
Jan 11, 5:34 PM CSTSevere Thunderstorm WarningTAELee, Randolph, Terrell86 min
Jan 11, 5:38 PM CSTSevere Thunderstorm WarningTAEJackson, Washington67 min
Jan 11, 5:46 PM CSTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Dougherty, Early, Miller and 1 more74 min
Jan 11, 6:33 PM CSTSevere Thunderstorm WarningTAELee, Worth57 min
Jan 11, 6:43 PM CSTSevere Thunderstorm WarningTAEJackson47 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.7 hours before the alert went out and 103 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, Tallahassee Rgnl, FL at 12:00Z on 2020-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 joules per kilogram.LCLLFCEL10008507005003002001001 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, Tallahassee Rgnl, FL at 12:00Z on 2020-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 224 square meters per square second.193958Sfc1 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
44 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
763 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
224 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

441 
WWUS20 KWNS 112042
SEL6  
SPC WW 112042
ALZ000-FLZ000-GAZ000-CWZ000-120200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 16
NWS Storm Prediction Center Norman OK
345 PM EST Sat Jan 11 2020

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southeast Alabama
  Florida Panhandle
  Southwest Georgia
  Coastal Waters

* Effective this Saturday afternoon and evening from 345 PM until
  900 PM EST.

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

SUMMARY...A line of thunderstorms over southern Alabama will
continue to track eastward this afternoon and evening across the
watch area.  Locally gusty/damaging wind gusts are possible with
these storms, along with a risk of isolated tornadoes.

The tornado watch area is approximately along and 55 statute miles
east and west of a line from 45 miles north northeast of Dothan AL
to 40 miles west southwest of Apalachicola FL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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 13...WW 14...WW 15...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 24035.

...Hart

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 11, 6:12 AM CSTMesoscale DiscussionSPCColbert, Lauderdale, Limestone, Madison93 min
Jan 11, 6:57 AM CSTTornado WatchSPCColbert, Cullman, Fayette, Franklin, Lamar, Lauderdale and 7 more7 hr
Jan 11, 7:39 AM CSTMesoscale DiscussionSPCChoctaw, Clarke, Greene, Hale, Marengo, Mobile and 3 more96 min
Jan 11, 7:57 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Blount, Butler, Chilton and 22 more9 hr
Jan 11, 9:28 AM CSTMesoscale DiscussionSPCBlount, Cullman, DeKalb, Fayette, Jackson, Lawrence and 7 more92 min
Jan 11, 9:54 AM CSTMesoscale DiscussionSPCChoctaw, Greene, Marengo, Pickens, Sumter, Washington96 min
Jan 11, 11:50 AM CSTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Clarke, Cullman and 15 more85 min
Jan 11, 12:20 PM CSTMesoscale DiscussionSPCBlount, Calhoun, Chambers, Cherokee, Clay, Cleburne and 9 more85 min
Jan 11, 12:42 PM CSTTornado WatchSPCBarbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 15 more7 hr
Jan 11, 1:15 PM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Chilton, DeKalb, Etowah and 6 more90 min
Jan 11, 2:26 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Coffee, Covington, Crenshaw and 10 more94 min
Jan 11, 3:16 PM CSTMesoscale DiscussionSPCBullock, Chambers, Clay, Cleburne, Lee, Macon and 3 more89 min
Jan 11, 5:21 PM CSTMesoscale DiscussionSPCHouston114 min
Jan 11, 3:48 PM CSTMesoscale DiscussionSPCBanks, Elbert, Franklin, Habersham, Hart, Madison and 2 more117 min
Jan 11, 4:38 PM CSTTornado WatchSPCBaldwin, Bleckley, Burke, Clarke, Columbia, Dodge and 34 more6 hr
Jan 11, 5:36 PM CSTMesoscale DiscussionSPCBaldwin, Banks, Barrow, Bibb, Bleckley, Butts and 63 more84 min

Nearby

Tornado Watches in Georgia, 2020Tornado Watches in Florida, 2020Tornado Watches in Alabama, 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.