Alert archive / Georgia / Mesoscale Discussions in 2024

Mesoscale Discussion 2313

December 29, 20247 counties in Alabama; 22 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Dec 29, 2024, 1:21 AM CST for 7 counties in Alabama; 22 counties in Georgia. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Dec 29, 2024, 1:21 AM CST (07:21 UTC)
Expired
Dec 29, 2024, 2:15 AM CST
In force
54 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 722...723
All 29 counties

Barbour County, AL, Bullock County, AL, Chambers County, AL, Lee County, AL, Macon County, AL, Russell County, AL, Tallapoosa County, AL, Bibb County, GA, Chattahoochee County, GA, Crawford County, GA, Harris County, GA, Houston County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Monroe County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Schley County, GA, Spalding County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Webster County, GA

The radar

The Maxwell AFB radar (KMXX), 75 km from the middle of the area, began a volume at 07:23 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.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 7.4 hours before the alert went out and 101 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 00:00Z on 2024-12-29Temperature 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, Peachtre/Fal Fld, GA at 00:00Z on 2024-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 312 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
455 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
312 m²/s²
0-3 km storm-relative helicity
368 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 28, 6:34 PM CSTTornado WatchSPCBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more9 hr
Dec 28, 6:59 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Blount, Chilton, Colbert, Coosa and 21 more91 min
Dec 28, 7:39 PM CSTMesoscale DiscussionSPCBaldwin, Escambia, Mobile, Washington66 min
Dec 28, 8:09 PM CSTTornado WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 44 more7 hr
Dec 28, 9:43 PM CSTMesoscale DiscussionSPCAutauga, Bibb, Blount, Chilton, Colbert, Cullman and 21 more92 min
Dec 28, 10:08 PM CSTMesoscale DiscussionSPCBaldwin, Butler, Clarke, Conecuh, Crenshaw, Escambia and 3 more97 min
Dec 28, 11:34 PM CSTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Calhoun and 27 more116 min
Dec 29, 12:54 AM CSTTornado WatchSPCCoffee, Dale, Geneva, Henry, Houston7 hr
Dec 29, 3:06 AM CSTMesoscale DiscussionSPCHenry, Houston84 min
Dec 29, 4:22 AM CSTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Bleckley, Burke, Clarke and 32 more53 min
Dec 29, 5:02 AM CSTTornado WatchSPCBryan, Bulloch, Burke, Candler, Chatham, Columbia and 17 more7 hr
Dec 29, 6:01 AM CSTMesoscale DiscussionSPCBrooks, Clinch, Cook, Echols, Grady, Lanier and 3 more59 min
Dec 29, 7:32 AM CSTMesoscale DiscussionSPCBryan, Bulloch, Chatham, Effingham, Evans, Liberty and 1 more88 min
Dec 29, 7:34 AM CSTTornado WatchSPCBrantley, Brooks, Camden, Charlton, Clinch, Echols and 5 more5 hr

Nearby

Mesoscale Discussions in Georgia, 2024Mesoscale Discussions in Alabama, 2024Every mesoscale discussion in 2024

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.