Alert archive / Georgia / Mesoscale Discussions in 2022

Mesoscale Discussion 25

January 2, 202221 counties in Georgia; 14 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2022, 11:11 PM EST for 21 counties in Georgia; 14 counties in South Carolina. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jan 2, 2022, 11:11 PM EST (04:11 UTC)
Expired: Jan 3, 2022, 1:45 AM EST
In force: 3 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

All 35 counties

Baldwin County, GA, Bleckley County, GA, Burke County, GA, Columbia County, GA, Dodge County, GA, Emanuel County, GA, Glascock County, GA, Hancock County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Lincoln County, GA, McDuffie County, GA, Pulaski County, GA, Richmond County, GA, Treutlen County, GA, Twiggs County, GA, Warren County, GA, Washington County, GA, Wilkinson County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC

The radar

The Robins AFB radar (KJGX), 119 km from the middle of the area, began a volume at 04:15 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 00:00Z, 4.2 hours before the alert went out and 207 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 159 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 261 m²/s²
0-3 km storm-relative helicity: 341 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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.

Issued	Product	Office	Counties	Lasted
Jan 2, 7:19 PM EST	Mesoscale Discussion	SPC	Catoosa, Dade, Fannin, Murray, Walker, Whitfield	5 hr
Jan 2, 9:26 PM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Camden and 15 more	64 min
Jan 2, 9:53 PM EST	Tornado Watch	SPC	Appling, Atkinson, Bacon, Brantley, Brooks, Bryan and 22 more	5 hr
Jan 3, 12:17 AM EST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Berrien, Brantley, Bryan and 23 more	118 min
Jan 3, 4:25 AM EST	Mesoscale Discussion	SPC	Berkeley, Chesterfield, Clarendon, Darlington, Dillon, Dorchester and 9 more	3 hr
Jan 3, 5:41 AM EST	Tornado Watch	SPC	Dillon, Horry, Marion	5 hr

Nearby

Mesoscale Discussions in Georgia, 2022 Mesoscale Discussions in South Carolina, 2022 Every mesoscale discussion in 2022

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.