Alert archive / Georgia / Mesoscale Discussions in 2025
Mesoscale Discussion 855
The Storm Prediction Center issued this mesoscale discussion at May 18, 2025, 10:18 AM EDT for 39 counties in Georgia. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2025, 10:18 AM EDT (14:18 UTC)
- Expired
- May 18, 2025, 12:15 PM EDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 285
All 39 counties
Appling County, GA, Bacon County, GA, Ben Hill County, GA, Bleckley County, GA, Brantley County, GA, Chattahoochee County, GA, Coffee County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Glynn County, GA, Houston County, GA, Irwin County, GA, Jeff Davis County, GA, Laurens County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Macon County, GA, Marion County, GA, McIntosh County, GA, Montgomery County, GA, Peach County, GA, Pierce County, GA, Pulaski County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Tattnall County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Turner County, GA, Twiggs County, GA, Wayne County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 2.3 hours before the alert went out and 243 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
- 61 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 1547 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 7:40 AM EDT | Mesoscale Discussion | SPC | Heard, Troup | 65 min |
| May 18, 8:14 AM EDT | Severe Thunderstorm Watch | SPC | Baldwin, Bibb, Bleckley, Butts, Carroll, Chattahoochee and 51 more | 4 hr |
Nearby
Mesoscale Discussions in Georgia, 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.