Alert archive / Georgia / Mesoscale Discussions in 2025
Mesoscale Discussion 1221
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2025, 1:20 PM EDT for Hamilton County, Madison County, Nassau County, Florida; 31 counties in Georgia. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2025, 1:20 PM EDT (17:20 UTC)
- Expired
- Jun 9, 2025, 3:15 PM EDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 34 counties
Hamilton County, FL, Madison County, FL, Nassau County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Echols County, GA, Evans County, GA, Glynn County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Thomas County, GA, Tift County, GA, Ware County, GA, Wayne County, GA
The radar
The Moody AFB radar (KVAX), 68 km from the middle of the area, began a volume at 17:22 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, 5.3 hours before the alert went out and 113 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
- 1443 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 863 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
202
ACUS11 KWNS 091721
SWOMCD
SPC MCD 091720
SCZ000-GAZ000-FLZ000-091915-
Mesoscale Discussion 1221
NWS Storm Prediction Center Norman OK
1220 PM CDT Mon Jun 09 2025
Areas affected...portions of north FL and southeast GA
Concerning...Severe potential...Watch unlikely
Valid 091720Z - 091915Z
Probability of Watch Issuance...20 percent
SUMMARY...Locally strong wind gusts may occur this afternoon with
thunderstorm activity developing east/northeast across the region.
DISCUSSION...A cluster of thunderstorms across southern GA has
occasionally shown near-severe level velocity signatures on radar of
the past 30 minutes, and a gust to 55 mph was noted in Lowndes
County GA. This activity is occurring within a moderately unstable
but weakly sheared environment. Given weak shear, thunderstorms will
likely remain somewhat disorganized. However, steep low-level lapse
rates and PW values near 2 inches may support water-loaded
downdrafts and sporadic strong downburst winds as convection
develops east/northeast through the afternoon. Overall severe
potential is expected to remain limited and a watch is not
anticipated at this time.
..Leitman/Mosier.. 06/09/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...JAX...FFC...TAE...
LAT...LON 31158401 31818316 32358170 32318115 31958085 31598093
31098125 30578174 30288310 30378349 30748407 31158401
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 INSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 1:53 PM EDT | Mesoscale Discussion | SPC | Holmes | 2 hr |
Nearby
Mesoscale Discussions in Georgia, 2025Mesoscale Discussions in Florida, 2025Every mesoscale discussion in 2025
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.