Alert archive / Georgia / Mesoscale Discussions in 2018
Mesoscale Discussion 1692
The Storm Prediction Center issued this mesoscale discussion at Dec 2, 2018, 6:00 AM CST for Jackson County, Florida; 35 counties in Georgia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 2, 2018, 6:00 AM CST (12:00 UTC)
- Expired
- Dec 2, 2018, 8:00 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Jackson County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Seminole County, GA, Tattnall County, GA, Thomas County, GA, Tift County, GA, Ware County, GA, Wayne County, GA
The radar
The Moody AFB radar (KVAX), 49 km from the middle of the area, began a volume at 12:01 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, 0.0 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
- 2226 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 486 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 293 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 10.9
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 |
|---|---|---|---|---|
| Dec 1, 9:18 PM CST | Mesoscale Discussion | SPC | Calhoun, Gadsden, Holmes, Jackson, Jefferson, Leon and 5 more | 87 min |
| Dec 1, 11:27 PM CST | Mesoscale Discussion | SPC | Holmes | 93 min |
| Dec 2, 2:03 AM CST | Mesoscale Discussion | SPC | Gadsden, Holmes, Jackson, Leon, Washington | 2 hr |
| Dec 2, 11:32 AM CST | Mesoscale Discussion | SPC | Leon | 88 min |
| Dec 2, 2:48 AM CST | Tornado Watch | SPC | Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 32 more | 7 hr |
| Dec 2, 9:00 AM CST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 38 more | 8 hr |
Nearby
Mesoscale Discussions in Georgia, 2018Mesoscale Discussions in Florida, 2018Every mesoscale discussion in 2018
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.