Alert archive / Georgia / Mesoscale Discussions in 2013
Mesoscale Discussion 161
The Storm Prediction Center issued this mesoscale discussion at Feb 13, 2013, 3:14 AM CST for 6 counties in Florida; 29 counties in Georgia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 13, 2013, 3:14 AM CST (09:14 UTC)
- Expired
- Feb 13, 2013, 5:15 AM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 35 counties
Calhoun County, FL, Gadsden County, FL, Hamilton County, FL, Jefferson County, FL, Leon County, FL, Madison County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Lanier County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Seminole County, GA, Thomas County, GA, Tift County, GA, Ware County, GA, Wayne County, GA
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 00:00Z, 9.2 hours before the alert went out and 172 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
- 218 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 887 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 359 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 7:38 AM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 7 more | 67 min |
| Feb 13, 10:44 AM CST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 14 more | 91 min |
| Feb 12, 10:46 PM CST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 12 more | 119 min |
| Feb 13, 4:31 AM CST | Tornado Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Chatham and 9 more | 3 hr |
Nearby
Mesoscale Discussions in Georgia, 2013Mesoscale Discussions in Florida, 2013Every mesoscale discussion in 2013
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.