Alert archive / South Carolina / Mesoscale Discussions in 2024

Mesoscale Discussion 2115

September 26, 202417 counties in Georgia; 23 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Sep 26, 2024, 12:42 PM EDT for 17 counties in Georgia; 23 counties in South Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 26, 2024, 12:42 PM EDT (16:42 UTC)
Expired
Sep 26, 2024, 2:45 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Tornado watch 684
All 40 counties

Appling County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Jenkins County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Wayne County, GA, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Clarendon County, SC, Colleton County, SC, Dorchester County, SC, Fairfield County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 22 km from the middle of the area, began a volume at 16:41 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

Charleston AFB, SC (KCHS), launched 12:00Z, 4.7 hours before the alert went out and 119 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, Charleston AFB, SC at 12:00Z on 2024-09-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 222 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, Charleston AFB, SC at 12:00Z on 2024-09-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
222 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1022 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.6

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
Sep 26, 7:36 AM EDTMesoscale DiscussionSPCBryan, Bulloch, Burke, Candler, Chatham, Effingham and 11 more114 min
Sep 26, 8:32 AM EDTTornado WatchSPCBibb, Bleckley, Bryan, Bulloch, Burke, Candler and 34 more12 hr
Sep 26, 10:12 AM EDTMesoscale DiscussionSPCAtkinson, Baker, Berrien, Brantley, Brooks, Camden and 20 more63 min
Sep 26, 10:49 AM EDTTornado WatchSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 34 more11 hr
Sep 26, 1:52 PM EDTMesoscale DiscussionSPCAppling, Baldwin, Ben Hill, Bibb, Bleckley, Crisp and 22 more53 min
Sep 26, 3:40 PM EDTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 39 more2 hr
Sep 26, 4:10 PM EDTMesoscale DiscussionSPCAppling, Brantley, Bryan, Bulloch, Burke, Camden and 16 more2 hr
Sep 26, 6:39 PM EDTMesoscale DiscussionSPCAppling, Bacon, Brantley, Bryan, Bulloch, Camden and 17 more5 hr
Sep 26, 7:02 PM EDTMesoscale DiscussionSPCAtkinson, Bacon, Berrien, Brantley, Brooks, Camden and 15 more88 min
Sep 26, 7:50 PM EDTTornado WatchSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 20 more9 hr

Nearby

Mesoscale Discussions in South Carolina, 2024Mesoscale Discussions in Georgia, 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.