Alert archive / Georgia / Mesoscale Discussions in 2023

Mesoscale Discussion 63

January 12, 202321 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2023, 6:12 PM EST for 21 counties in Georgia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jan 12, 2023, 6:12 PM EST (23:12 UTC)
Expired: Jan 12, 2023, 7:45 PM EST
In force: 93 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 21...22

All 21 counties

Bleckley County, GA, Calhoun County, GA, Colquitt County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Houston County, GA, Johnson County, GA, Laurens County, GA, Lee County, GA, Pulaski County, GA, Sumter County, GA, Terrell County, GA, Tift County, GA, Turner County, GA, Twiggs County, GA, Washington County, GA, Wilcox County, GA, Wilkinson County, GA, Worth County, GA

The radar

The Robins AFB radar (KJGX), 83 km from the middle of the area, began a volume at 23:10 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 12:00Z, 11.2 hours before the alert went out and 168 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: 27 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 12, 10:13 AM EST	Mesoscale Discussion	SPC	Bartow, Catoosa, Chattooga, Dade, Floyd, Gordon and 4 more	62 min
Jan 12, 11:03 AM EST	Tornado Watch	SPC	Bartow, Catoosa, Chattooga, Cherokee, Dade, Dawson and 11 more	6 hr
Jan 12, 11:52 AM EST	Mesoscale Discussion	SPC	Bartow, Carroll, Cherokee, Clayton, Cobb, Coweta and 17 more	53 min
Jan 12, 1:06 PM EST	Tornado Watch	SPC	Baldwin, Banks, Barrow, Bibb, Bleckley, Butts and 74 more	8 hr
Jan 12, 2:19 PM EST	Mesoscale Discussion	SPC	Baker, Calhoun, Clay, Decatur, Early, Miller and 6 more	116 min
Jan 12, 3:01 PM EST	Mesoscale Discussion	SPC	Clayton, Coweta, Fayette, Heard, Henry, Meriwether and 3 more	119 min
Jan 12, 3:36 PM EST	Tornado Watch	SPC	Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more	6 hr
Jan 12, 4:16 PM EST	Mesoscale Discussion	SPC	Columbia, Elbert, Franklin, Hart, Lincoln, Stephens	59 min
Jan 12, 4:41 PM EST	Tornado Watch	SPC	Burke, Columbia, Elbert, Franklin, Hart, Lincoln and 3 more	3 hr
Jan 12, 4:43 PM EST	Mesoscale Discussion	SPC	Calhoun, Clay, Dougherty, Lee, Quitman, Randolph and 5 more	92 min

Nearby

Mesoscale Discussions in Georgia, 2023 Every mesoscale discussion in 2023

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.