Alert archive / Georgia / Tornado Watches in 2021

Tornado Watch 107

April 24, 202121 counties in Georgia

The Storm Prediction Center issued this tornado watch at Apr 24, 2021, 10:35 AM EDT for 21 counties in Georgia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2021, 10:35 AM EDT (14:35 UTC)
Expired
Apr 24, 2021, 6:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 21 counties

Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA

The radar

The Moody AFB radar (KVAX), 89 km from the middle of the area, began a volume at 14:35 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
20%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 24, 10:57 AM EDTSevere Thunderstorm WarningJAXAtkinson, Clinch48 min
Apr 24, 11:15 AM EDTSevere Thunderstorm WarningJAXCoffee45 min
Apr 24, 11:35 AM EDTSevere Thunderstorm WarningJAXBacon, Ware40 min
Apr 24, 11:54 AM EDTSevere Thunderstorm WarningJAXAtkinson21 min
Apr 24, 12:04 PM EDTSevere Thunderstorm WarningJAXAppling, Brantley, Pierce, Wayne41 min
Apr 24, 12:08 PM EDTTornado WarningJAXBacon22 min
Apr 24, 12:18 PM EDTSevere Thunderstorm WarningJAXAtkinson, Bacon, Clinch, Pierce, Ware31 min
Apr 24, 12:36 PM EDTSevere Thunderstorm WarningJAXWayne24 min
Apr 24, 12:44 PM EDTSevere Thunderstorm WarningCHSLiberty, Long, McIntosh61 min
Apr 24, 1:29 PM EDTSevere Thunderstorm WarningCHSBryan, Chatham, Liberty, McIntosh61 min
Apr 24, 1:46 PM EDTSevere Thunderstorm WarningJAXClinch, Echols44 min
Apr 24, 2:15 PM EDTSevere Thunderstorm WarningJAXGlynn15 min
Apr 24, 2:32 PM EDTSevere Thunderstorm WarningJAXClinch, Echols43 min
Apr 24, 2:36 PM EDTTornado WarningJAXEchols24 min
Apr 24, 2:56 PM EDTSevere Thunderstorm WarningJAXClinch, Echols49 min
Apr 24, 3:03 PM EDTTornado WarningJAXClinch, Echols27 min
Apr 24, 3:30 PM EDTSevere Thunderstorm WarningJAXClinch, Echols, Ware45 min
Apr 24, 3:57 PM EDTSevere Thunderstorm WarningJAXCharlton, Ware48 min
Apr 24, 4:10 PM EDTSevere Thunderstorm WarningJAXCharlton28 min
Apr 24, 4:18 PM EDTSevere Thunderstorm WarningJAXCamden42 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

Jacksonville, FL (KJAX), launched 12:00Z, 2.6 hours before the alert went out and 110 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, Jacksonville, FL at 12:00Z on 2021-04-24Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
276 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

129 
WWUS20 KWNS 241430
SEL7  
SPC WW 241430
GAZ000-CWZ000-242200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 107
NWS Storm Prediction Center Norman OK
1035 AM EDT Sat Apr 24 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Southeast Georgia
  Coastal Waters

* Effective this Saturday morning and evening from 1035 AM until
  600 PM EDT.

* Primary threats include...
  A few tornadoes possible
  Scattered damaging wind gusts to 70 mph likely
  Scattered large hail events to 1 inch in diameter possible

SUMMARY...A line of thunderstorms over south-central Georgia will
continue tracking rapidly eastward across the watch area through the
early and mid-afternoon.  The strongest cells will pose a risk of
damaging wind gusts and isolated tornadoes.

The tornado watch area is approximately along and 40 statute miles
north and south of a line from 35 miles west of Waycross GA to 20
miles east northeast of Brunswick GA. 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 106...

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 500. Mean
storm motion vector 26040.

...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, 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, 4:00 PM EDTSevere Thunderstorm WatchSPCBaker, Berrien, Brooks, Calhoun, Chattahoochee, Clay and 30 more6 hr
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

Tornado Watches in Georgia, 2021Every tornado 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.