Alert archive / Georgia / Tornado Watches in 2020

Tornado Watch 15

January 11, 20204 states

The Storm Prediction Center issued this tornado watch at Jan 11, 2020, 12:42 PM CST for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jan 11, 2020, 12:42 PM CST (18:42 UTC)
Expired
Jan 11, 2020, 8:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
0.5 in
Strongest gust expected
65 kt
All 114 counties

Barbour County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Jackson County, AL, Lee County, AL, Macon County, AL, Marshall County, AL, Montgomery County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Talladega County, AL, Tallapoosa County, AL, Banks County, GA, Barrow County, GA, Bartow County, GA, Bibb County, GA, Butts County, GA, Carroll County, GA, Catoosa County, GA, Chattahoochee County, GA, Chattooga County, GA, Cherokee County, GA, Clayton County, GA, Cobb County, GA, Coweta County, GA, Crawford County, GA, Crisp County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Dooly County, GA, Douglas County, GA, Fannin County, GA, Fayette County, GA, Floyd County, GA, Forsyth County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Hall County, GA, Haralson County, GA, Harris County, GA, Heard County, GA, Henry County, GA, Houston County, GA, Jackson County, GA, Jasper County, GA, Jones County, GA, Lamar County, GA, Lumpkin County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Murray County, GA, Muscogee County, GA, Newton County, GA, Paulding County, GA, Peach County, GA, Pickens County, GA, Pike County, GA, Polk County, GA, Rockdale County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Towns County, GA, Troup County, GA, Union County, GA, Upson County, GA, Walker County, GA, Walton County, GA, Webster County, GA, White County, GA, Whitfield County, GA, Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Coffee County, TN, Cumberland County, TN, Franklin County, TN, Grundy County, TN, Hamilton County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Atlanta radar (KFFC), 85 km from the middle of the area, began a volume at 18:43 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
70%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
90%
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
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 11, 1:01 PM CSTSevere Thunderstorm WarningHUNCullman, Marshall, Morgan39 min
Jan 11, 1:07 PM CSTTornado WarningHUNCullman, Marshall, Morgan23 min
Jan 11, 1:09 PM CSTSevere Thunderstorm WarningBMXEtowah81 min
Jan 11, 1:24 PM CSTTornado WarningHUNJackson, Madison, Marshall36 min
Jan 11, 1:28 PM CSTSevere Thunderstorm WarningHUNDeKalb, Jackson, Marshall62 min
Jan 11, 1:40 PM CSTSevere Thunderstorm WarningBMXCalhoun, Coosa, Talladega80 min
Jan 11, 1:41 PM CSTSevere Thunderstorm WarningBMXCherokee79 min
Jan 11, 1:47 PM CSTTornado WarningHUNJackson28 min
Jan 11, 1:54 PM CSTSevere Thunderstorm WarningHUNFranklin21 min
Jan 11, 1:56 PM CSTSevere Thunderstorm WarningMRXHamilton, Marion, Sequatchie64 min
Jan 11, 2:00 PM CSTSevere Thunderstorm WarningFFCCatoosa, Chattooga, Dade, Floyd, Walker, Whitfield45 min
Jan 11, 2:02 PM CSTSevere Thunderstorm WarningOHXGrundy, Van Buren, Warren28 min
Jan 11, 2:09 PM CSTSevere Thunderstorm WarningBMXElmore, Montgomery62 min
Jan 11, 2:10 PM CSTTornado WarningHUNDeKalb20 min
Jan 11, 2:11 PM CSTSevere Thunderstorm WarningBMXClay61 min
Jan 11, 2:13 PM CSTTornado WarningHUNJackson15 min
Jan 11, 2:23 PM CSTSevere Thunderstorm WarningBMXCleburne63 min
Jan 11, 2:27 PM CSTSevere Thunderstorm WarningBMXTallapoosa66 min
Jan 11, 2:39 PM CSTTornado WarningMRXBledsoe, Hamilton, Marion, Sequatchie20 min
Jan 11, 2:40 PM CSTSevere Thunderstorm WarningBMXBullock, Macon, Pike80 min
Jan 11, 2:42 PM CSTSevere Thunderstorm WarningFFCBartow, Catoosa, Chattooga, Floyd, Gordon, Murray and 2 more48 min
Jan 11, 2:48 PM CSTSevere Thunderstorm WarningBMXRandolph72 min
Jan 11, 2:49 PM CSTSevere Thunderstorm WarningMRXBledsoe, Bradley, Hamilton, McMinn, Meigs, Polk and 2 more56 min
Jan 11, 2:53 PM CSTSevere Thunderstorm WarningFFCCarroll, Haralson, Polk52 min
Jan 11, 3:07 PM CSTSevere Thunderstorm WarningBMXChambers, Lee, Russell73 min
Jan 11, 3:13 PM CSTSevere Thunderstorm WarningMRXLoudon, McMinn, Meigs, Monroe, Polk47 min
Jan 11, 3:16 PM CSTSevere Thunderstorm WarningFFCCarroll, Heard44 min
Jan 11, 3:16 PM CSTSevere Thunderstorm WarningMRXAnderson, Meigs, Morgan, Rhea, Roane44 min
Jan 11, 3:18 PM CSTTornado WarningMRXMcMinn, Meigs, Rhea, Roane27 min
Jan 11, 3:19 PM CSTSevere Thunderstorm WarningFFCBartow, Cherokee, Fannin, Gilmer, Gordon, Murray and 3 more41 min
Jan 11, 3:27 PM CSTTornado WarningBMXChambers, Tallapoosa18 min
Jan 11, 3:31 PM CSTTornado WarningMRXPolk29 min
Jan 11, 3:32 PM CSTSevere Thunderstorm WarningOHXCumberland18 min
Jan 11, 3:38 PM CSTSevere Thunderstorm WarningMRXCherokee52 min
Jan 11, 3:42 PM CSTSevere Thunderstorm WarningBMXBarbour, Russell78 min
Jan 11, 3:47 PM CSTSevere Thunderstorm WarningFFCChattahoochee, Coweta, Harris, Heard, Meriwether, Muscogee and 2 more43 min
Jan 11, 3:50 PM CSTSevere Thunderstorm WarningMRXBlount, Jefferson, Knox, Loudon, Monroe, Sevier40 min
Jan 11, 3:51 PM CSTSevere Thunderstorm WarningFFCBartow, Carroll, Cherokee, Clayton, Cobb, Douglas and 2 more39 min
Jan 11, 3:53 PM CSTSevere Thunderstorm WarningFFCDawson, Fannin, Gilmer, Lumpkin, Pickens, Union52 min
Jan 11, 3:56 PM CSTSevere Thunderstorm WarningMRXAnderson, Campbell, Claiborne, Grainger, Hamblen, Jefferson and 3 more49 min
Jan 11, 4:02 PM CSTTornado WarningFFCHarris, Muscogee28 min
Jan 11, 4:23 PM CSTSevere Thunderstorm WarningMRXBlount, Hamblen, Jefferson, Knox, Monroe, Sevier52 min
Jan 11, 4:24 PM CSTSevere Thunderstorm WarningFFCClayton, DeKalb, Fayette, Forsyth, Fulton, Gwinnett and 1 more51 min
Jan 11, 4:27 PM CSTSevere Thunderstorm WarningFFCDawson, Hall, Lumpkin, Towns, Union, White48 min
Jan 11, 4:29 PM CSTSevere Thunderstorm WarningFFCClayton, Coweta, Fayette, Harris, Henry, Lamar and 5 more46 min
Jan 11, 4:34 PM CSTSevere Thunderstorm WarningFFCChattahoochee, Marion, Stewart, Talbot41 min
Jan 11, 4:34 PM CSTSevere Thunderstorm WarningMRXCherokee, Clay41 min
Jan 11, 4:37 PM CSTTornado WarningBMXBarbour23 min
Jan 11, 4:37 PM CSTSevere Thunderstorm WarningMRXClaiborne, Grainger, Hancock, Hawkins, Knox, Union53 min
Jan 11, 4:57 PM CSTSevere Thunderstorm WarningFFCChattahoochee, Marion, Stewart, Webster48 min
Jan 11, 5:08 PM CSTSevere Thunderstorm WarningFFCCrawford, Lamar, Monroe, Taylor, Upson52 min
Jan 11, 5:10 PM CSTSevere Thunderstorm WarningFFCBanks, Barrow, Gwinnett, Hall, Jackson, Walton50 min
Jan 11, 5:12 PM CSTSevere Thunderstorm WarningFFCButts, DeKalb, Henry, Jasper, Newton, Rockdale and 2 more48 min
Jan 11, 5:17 PM CSTSevere Thunderstorm WarningFFCChattahoochee, Marion, Taylor43 min
Jan 11, 5:41 PM CSTSevere Thunderstorm WarningFFCMacon, Marion, Schley, Sumter, Taylor, Webster34 min
Jan 11, 5:52 PM CSTSevere Thunderstorm WarningFFCJasper, Morgan, Putnam38 min
Jan 11, 5:58 PM CSTSevere Thunderstorm WarningFFCBibb, Crawford, Houston, Peach, Taylor, Twiggs47 min
Jan 11, 6:14 PM CSTSevere Thunderstorm WarningFFCDooly, Houston, Macon, Peach, Sumter, Twiggs46 min
Jan 11, 6:43 PM CSTSevere Thunderstorm WarningFFCBaldwin, Bibb, Jones, Twiggs, Washington, Wilkinson47 min
Jan 11, 6:54 PM CSTSevere Thunderstorm WarningFFCBleckley, Dodge, Houston, Laurens, Pulaski, Twiggs and 1 more51 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 6.7 hours before the alert went out and 91 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, Peachtre/Fal Fld, GA at 12:00Z on 2020-01-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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, Peachtre/Fal Fld, GA at 12:00Z on 2020-01-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 417 square meters per square second.19395878Sfc1 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
13 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
417 m²/s²
0-3 km storm-relative helicity
450 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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, 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, 2:44 PM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston5 hr
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
Jan 10, 11:58 PM CSTTornado WatchSPCCrockett, Dyer, Fayette, Gibson, Haywood, Lake and 4 more7 hr
Jan 11, 3:52 AM CSTMesoscale DiscussionSPCCrockett, Dyer, Fayette, Hardeman, Haywood, Lauderdale and 3 more83 min
Jan 11, 4:17 AM CSTTornado WatchSPCBenton, Carroll, Chester, Decatur, Hardeman, Hardin and 5 more6 hr
Jan 11, 5:06 AM CSTMesoscale DiscussionSPCFayette, Hardeman, McNairy54 min
Jan 11, 8:20 AM CSTMesoscale DiscussionSPCBledsoe, Cannon, Clay, Cumberland, DeKalb, Fentress and 11 more55 min

Nearby

Tornado Watches in Georgia, 2020Tornado Watches in Tennessee, 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.