Alert archive / Georgia / Mesoscale Discussions in 2021
Mesoscale Discussion 2088
The Storm Prediction Center issued this mesoscale discussion at Dec 30, 2021, 6:35 PM EST for 38 counties in Georgia. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Dec 30, 2021, 6:35 PM EST (23:35 UTC)
- Expired
- Dec 30, 2021, 8:30 PM EST
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 572
All 38 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, Camden County, GA, Candler County, GA, Chatham County, GA, Coffee County, GA, Cook County, GA, Crisp County, GA, Dodge County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Montgomery County, GA, Pierce 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 Moody AFB radar (KVAX), 120 km from the middle of the area, began a volume at 23:34 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
Jacksonville, FL (KJAX), launched 12:00Z, 11.6 hours before the alert went out and 144 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
- 35 J/kg
- Mixed-layer CIN
- -130 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
314
ACUS11 KWNS 302335
SWOMCD
SPC MCD 302335
SCZ000-GAZ000-310130-
Mesoscale Discussion 2088
NWS Storm Prediction Center Norman OK
0535 PM CST Thu Dec 30 2021
Areas affected...southern Georgia into far southern South Carolina
Concerning...Severe Thunderstorm Watch 572...
Valid 302335Z - 310130Z
The severe weather threat for Severe Thunderstorm Watch 572
continues.
SUMMARY...The threat for marginal hail and a brief tornado continues
across the watch area.
DISCUSSION...Scattered storms persist this evening across southern
GA into far southern SC, beneath moderate west/southwest flow aloft
and focused along an east-west oriented outflow boundary. MLCAPE of
1000-1500 J/kg remains over GA, with effective deep-layer shear
around 55 kt. Low-level shear remains favorable for rotating storms
as well, and 0-1 km SRH over 150 m2/s2 may support a brief tornado.
Indeed, a pair of supercells currently exist across south-central
GA, near the western part of the boundary with better access to the
most unstable air.
The primary severe risk may persist for a 1-2 more hours before the
boundary layer stabilizes further. WW 572 is set to expire at 0200Z,
but local extensions could be needed if isolated cells remain severe
beyond that time.
..Jewell.. 12/30/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...JAX...FFC...TAE...
LAT...LON 30848135 30938268 30988313 31208361 31598389 32018374
32308337 32558307 32578236 32518167 32348108 32098078
32018078 31668106 31188127 30848135SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 8:27 PM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Chattooga, Dade, Floyd, Gilmer and 5 more | 2 hr |
| Dec 29, 9:44 PM EST | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Chattooga, Cherokee, Clarke and 28 more | 2 hr |
| Dec 29, 10:16 PM EST | Tornado Watch | SPC | Banks, Barrow, Bartow, Butts, Carroll, Cherokee and 51 more | 7 hr |
| Dec 29, 11:56 PM EST | Mesoscale Discussion | SPC | Banks, Barrow, Butts, Carroll, Clarke, Clayton and 34 more | 2 hr |
| Dec 30, 2:15 AM EST | Mesoscale Discussion | SPC | Butts, Clayton, Coweta, Fayette, Greene, Heard and 15 more | 90 min |
| Dec 30, 5:02 AM EST | Mesoscale Discussion | SPC | Baldwin, Bibb, Butts, Columbia, Coweta, Glascock and 17 more | 2 hr |
| Dec 30, 11:34 AM EST | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Crawford and 33 more | 116 min |
| Dec 30, 2:00 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Baker, Ben Hill, Berrien and 29 more | 2 hr |
| Dec 30, 2:05 PM EST | Severe Thunderstorm Watch | SPC | Baldwin, Bibb, Bleckley, Bulloch, Burke, Candler and 45 more | 7 hr |
| Dec 30, 3:54 PM EST | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Candler, Chattahoochee, Crawford and 36 more | 2 hr |
Nearby
Mesoscale Discussions in Georgia, 2021Every mesoscale discussion in 2021
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.