Alert archive / Georgia / Mesoscale Discussions in 2022
Mesoscale Discussion 21
The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2022, 4:50 PM EST for 39 counties in Georgia. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jan 2, 2022, 4:50 PM EST (21:50 UTC)
- Expired
- Jan 2, 2022, 6:15 PM EST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 9
All 39 counties
Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Candler County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Dodge County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Irwin County, GA, Jeff Davis County, GA, Jenkins County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, Montgomery County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA
The radar
The Robins AFB radar (KJGX), 118 km from the middle of the area, began a volume at 21:49 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 12:00Z, 9.8 hours before the alert went out and 175 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.
- Mixed-layer CAPE
- 19 J/kg
- Mixed-layer CIN
- -713 J/kg
- Mixed-layer LCL
- 715 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 260 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
977
ACUS11 KWNS 022151
SWOMCD
SPC MCD 022150
SCZ000-GAZ000-022315-
Mesoscale Discussion 0021
NWS Storm Prediction Center Norman OK
0350 PM CST Sun Jan 02 2022
Areas affected...South-Central/Southeast GA....Far Southwest SC
Concerning...Tornado Watch 9...
Valid 022150Z - 022315Z
The severe weather threat for Tornado Watch 9 continues.
SUMMARY...Ongoing storm cluster as well as the cells ahead of it
will continue to pose a risk for damaging wind gusts and/or brief
tornadoes. This risk may extent past the edge of Tornado Watch 9 and
trends will be monitored for potential downstream watch issuance.
DISCUSSION...Ongoing thunderstorm cluster in southwest GA continue
to move northeastward at 35-40 kt, with the cells out ahead of the
cluster exhibiting similar motion. Damaging wind gusts are the
primary risk, but a brief tornado is also possible. This storm
motion will likely bring the cells ahead of the cluster in Dodge and
Wilcox counties to the northeast edge of Tornado Watch 9 near 23Z.
The main cluster may move a bit slower, but could still reach the
east-central edge of Tornado Watch 9 in the 2300Z to 0000Z time
frame.
The downstream air mass across southeast GA and adjacent far
southwest SC is split by an outflow boundary stretching from near
CHS southwestward to about 25 miles north of ABY. Mid 60s dewpoints
are in place on both sides of the boundary, but temperatures are in
the upper 60s/low 70s on north side and the low 80s on the south
side. As a result, buoyancy increases from north to south, with
MLCAPE near 500 J/kg near the GA/SC border to near 1000 J/kg over
southeast GA. Bulk vertical shear is strong throughout the region,
with low-level shear maximized across southeast GA.
Given the current trends and this downstream environment, some
threat for additional severe may exist east of Tornado Watch 9,
particularly if the outflow boundary begins to move back northward
as a warm front. Convective trends will be monitored for potential
downstream watch issuance.
..Mosier/Grams.. 01/02/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...CAE...JAX...FFC...TAE...
LAT...LON 32628289 32828218 32848140 32638112 32078128 31338163
30828227 30868302 31028423 31708404 32628289SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 7:53 PM EST | Tornado Watch | SPC | Catoosa, Chattooga, Dade, Fannin, Gilmer, Gordon and 6 more | 7 hr |
| Jan 1, 9:30 PM EST | Mesoscale Discussion | SPC | Catoosa, Dade, Walker, Whitfield | 60 min |
| Jan 1, 11:07 PM EST | Tornado Watch | SPC | Bartow, Carroll, Cherokee, Cobb, Douglas, Floyd and 5 more | 6 hr |
| Jan 2, 12:19 AM EST | Mesoscale Discussion | SPC | Catoosa, Chattooga, Dade, Floyd, Polk, Walker | 116 min |
| Jan 2, 3:19 AM EST | Mesoscale Discussion | SPC | Carroll, Haralson, Heard, Troup | 116 min |
| Jan 2, 1:53 PM EST | Mesoscale Discussion | SPC | Baker, Brooks, Calhoun, Clay, Colquitt, Cook and 23 more | 2 hr |
| Jan 2, 2:17 PM EST | Tornado Watch | SPC | Baker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 42 more | 9 hr |
| Jan 2, 3:48 PM EST | Mesoscale Discussion | SPC | Baker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 32 more | 117 min |
| Jan 2, 5:01 PM EST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more | 5 hr |
| Jan 2, 6:52 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 32 more | 113 min |
Nearby
Mesoscale Discussions in Georgia, 2022Every 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.