Alert archive / Georgia / Mesoscale Discussions in 2023
Mesoscale Discussion 1908
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2023, 3:19 PM CDT for 8 counties in Alabama; Holmes County, Jackson County, Nassau County, Florida; 73 counties in Georgia. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2023, 3:19 PM CDT (20:19 UTC)
- Expired
- Aug 8, 2023, 4:45 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 613
All 84 counties
Barbour County, AL, Bullock County, AL, Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Russell County, AL, Holmes County, FL, Jackson County, FL, Nassau County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Bleckley County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Bulloch County, GA, Calhoun County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Chattahoochee County, GA, Clay County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Crisp County, GA, Decatur County, GA, Dodge County, GA, Dooly County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, Macon County, GA, Marion County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Quitman County, GA, Randolph County, GA, Schley County, GA, Seminole County, GA, Stewart County, GA, Sumter County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Treutlen County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Worth County, GA
The radar
The Moody AFB radar (KVAX), 71 km from the middle of the area, began a volume at 20:20 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.3 hours before the alert went out and 149 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
- 3142 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 614 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.5
The text
As transmitted.
534
ACUS11 KWNS 082020
SWOMCD
SPC MCD 082019
SCZ000-GAZ000-FLZ000-ALZ000-082145-
Mesoscale Discussion 1908
NWS Storm Prediction Center Norman OK
0319 PM CDT Tue Aug 08 2023
Areas affected...Portions of southeastern Alabama into southern
Georgia...far northern Florida Panhandle
Concerning...Severe Thunderstorm Watch 613...
Valid 082019Z - 082145Z
The severe weather threat for Severe Thunderstorm Watch 613
continues.
SUMMARY...The threat for damaging gusts continues across Severe
Thunderstorm Watch 613. The threat may continue east into far
eastern GA and a downstream Severe Thunderstorm Watch may be needed
in an hour or two.
DISCUSSION...A loosely organized MCS continues to progress eastward
across eastern AL, where multiple strong wind gusts have been noted.
Surface temperatures have risen into the mid to upper 90s F across
southern GA (to the Atlantic Coastline), where 20Z mesoanalysis
depicts 6000 J/kg SBCAPE/MUCAPE. The potential for damaging gusts
should accompany the MCS to the Atlantic Coast. As such, a
downstream Severe Thunderstorm Watch may be needed in the next hour
or so to address the damaging gust threat.
..Squitieri/Guyer.. 08/08/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...JAX...FFC...TAE...BMX...
LAT...LON 31468612 32428554 32668439 32538230 32338106 32048085
31358098 30878115 30658128 30578193 30558402 30658516
30918597 31468612SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:40 AM CDT | Mesoscale Discussion | SPC | Sumter | 2 hr |
| Aug 8, 1:01 PM CDT | Mesoscale Discussion | SPC | Autauga, Barbour, Bullock, Butler, Chilton, Choctaw and 27 more | 89 min |
| Aug 8, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | Barbour, Bullock, Coffee, Dale, Geneva, Henry and 5 more | 5 hr |
| Aug 8, 4:28 PM CDT | Severe Thunderstorm Watch | SPC | Duval, Nassau | 4 hr |
Nearby
Mesoscale Discussions in Georgia, 2023Mesoscale Discussions in Alabama, 2023Mesoscale Discussions in Florida, 2023Every 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.