Alert archive / Georgia / Severe Thunderstorm Watches in 2021

Severe Thunderstorm Watch 109

April 24, 202136 counties in Georgia

The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2021, 4:00 PM EDT for 36 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2021, 4:00 PM EDT (20:00 UTC)
Expired
Apr 24, 2021, 10:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 36 counties

Baker County, GA, Berrien County, GA, Brooks County, GA, Calhoun County, GA, Chattahoochee County, GA, Clay County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Harris County, GA, Lee County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, Miller County, GA, Mitchell County, GA, Muscogee County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Webster County, GA, Worth County, GA

The radar

The Robins AFB radar (KJGX), 117 km from the middle of the area, began a volume at 20:01 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
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 24, 4:34 PM EDTSevere Thunderstorm WarningTAEBaker, Calhoun, Dougherty, Early, Miller, Mitchell41 min
Apr 24, 4:58 PM EDTSevere Thunderstorm WarningTAEBaker, Colquitt, Dougherty, Lee, Miller, Mitchell and 3 more47 min
Apr 24, 5:31 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Colquitt, Cook, Irwin, Tift and 2 more44 min
Apr 24, 5:32 PM EDTSevere Thunderstorm WarningFFCHarris, Meriwether, Troup43 min
Apr 24, 5:44 PM EDTSevere Thunderstorm WarningTAEColquitt, Dougherty, Mitchell, Worth31 min
Apr 24, 6:10 PM EDTSevere Thunderstorm WarningTAEBerrien, Colquitt, Cook, Irwin, Tift, Worth80 min
Apr 24, 6:37 PM EDTTornado WarningTAEBaker, Calhoun, Clay, Early, Terrell38 min
Apr 24, 7:02 PM EDTTornado WarningTAECalhoun, Dougherty, Lee, Terrell12 min
Apr 24, 7:05 PM EDTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Early, Randolph, Terrell40 min
Apr 24, 7:38 PM EDTSevere Thunderstorm WarningTAECalhoun, Dougherty, Lee, Terrell, Worth52 min
Apr 24, 7:41 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Irwin, Tift19 min
Apr 24, 7:47 PM EDTSevere Thunderstorm WarningTAECalhoun, Clay, Quitman, Randolph43 min
Apr 24, 7:57 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Irwin, Tift33 min
Apr 24, 8:01 PM EDTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Dougherty, Early, Randolph and 1 more29 min
Apr 24, 8:05 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Colquitt, Irwin, Tift, Worth40 min
Apr 24, 8:06 PM EDTSevere Thunderstorm WarningTAEClay, Early39 min
Apr 24, 8:10 PM EDTTornado WarningTAEBerrien, Tift, Worth35 min
Apr 24, 8:26 PM EDTFlash Flood WarningTAEBen Hill, Colquitt, Irwin, Mitchell, Tift, Turner and 1 more3 hr
Apr 24, 8:30 PM EDTSevere Thunderstorm WarningTAECalhoun, Dougherty, Lee, Terrell, Worth45 min
Apr 24, 8:37 PM EDTSevere Thunderstorm WarningTAEBen Hill, Berrien, Colquitt, Cook, Irwin, Tift and 1 more68 min
Apr 24, 8:37 PM EDTSevere Thunderstorm WarningTAEBaker, Calhoun, Clay, Dougherty, Early, Randolph and 1 more39 min
Apr 24, 8:48 PM EDTTornado WarningTAEBerrien, Irwin12 min
Apr 24, 9:21 PM EDTSevere Thunderstorm WarningTAEBerrien, Brooks, Colquitt, Cook, Lanier, Lowndes and 1 more54 min
Apr 24, 9:55 PM EDTTornado WarningTAEBerrien, Cook, Lanier, Lowndes35 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, 8.0 hours before the alert went out and 167 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 2021-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 447 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
175 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
544 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
447 m²/s²
0-3 km storm-relative helicity
570 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

267 
WWUS20 KWNS 241957
SEL9  
SPC WW 241957
GAZ000-250200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 109
NWS Storm Prediction Center Norman OK
400 PM EDT Sat Apr 24 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southwest Georgia

* Effective this Saturday afternoon and evening from 400 PM until
  1000 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph likely
  Scattered large hail events to 1.5 inches in diameter likely
  A tornado or two possible

SUMMARY...Thunderstorms will continue to intensify over southern
Alabama and track eastward into southwest Georgia.  Damaging winds
and hail appear to be the main threats, but there is some risk of a
tornado or two in the most intense cells.

The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 35 miles east northeast
of Columbus GA to 40 miles southwest of Moultrie GA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 107...WW 108...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
25035.

...Hart

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 6:22 AM EDTTornado WatchSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more9 hr
Apr 24, 8:29 AM EDTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 19 more91 min
Apr 24, 10:10 AM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 24 more95 min
Apr 24, 10:35 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Camden and 15 more7 hr
Apr 24, 12:05 PM EDTMesoscale DiscussionSPCAtkinson, Berrien, Brooks, Clinch, Colquitt, Cook and 10 more85 min
Apr 24, 2:22 PM EDTMesoscale DiscussionSPCChattooga, Dade, Floyd, Walker113 min
Apr 24, 4:35 PM EDTMesoscale DiscussionSPCCamden, Charlton85 min
Apr 24, 5:52 PM EDTSevere Thunderstorm WatchSPCBarrow, Bartow, Butts, Carroll, Chattooga, Cherokee and 26 more4 hr
Apr 24, 6:56 PM EDTMesoscale DiscussionSPCBaker, Calhoun, Clay, Colquitt, Cook, Dougherty and 8 more94 min
Apr 24, 7:13 PM EDTMesoscale DiscussionSPCBarrow, Bartow, Butts, Carroll, Chattooga, Cherokee and 31 more2 hr
Apr 24, 7:47 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Berrien, Brantley, Bryan and 12 more118 min

Nearby

Severe Thunderstorm Watches in Georgia, 2021Every severe thunderstorm watch in 2021

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.