Alert archive / Georgia / Mesoscale Discussions in 2008
Mesoscale Discussion 266
The Storm Prediction Center issued this mesoscale discussion at Feb 18, 2008, 2:39 AM EST for 14 counties in Florida; 27 counties in Georgia. It was in force for 36 min.
The area
The outline as issued.
The facts
- Issued
- Feb 18, 2008, 2:39 AM EST (07:39 UTC)
- Expired
- Feb 18, 2008, 3:15 AM EST
- In force
- 36 min
- Issued by
- the Storm Prediction Center
All 41 counties
Columbia County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Ben Hill County, GA, Berrien County, GA, Brooks County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Echols County, GA, Evans County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lowndes County, GA, Montgomery County, GA, Pierce County, GA, Tattnall County, GA, Telfair County, GA, Thomas County, GA, Tift County, GA, Toombs County, GA, Turner County, GA, Ware County, GA, Wheeler County, GA
The radar
The Tallahassee radar (KTLH), 64 km from the middle of the area, began a volume at 07:39 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 00:00Z, 7.7 hours before the alert went out and 61 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
- 593 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 478 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 6.1
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 17, 8:34 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 9 more | 56 min |
| Feb 17, 11:35 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Hamilton and 9 more | 85 min |
| Feb 18, 2:57 AM EST | Tornado Watch | SPC | Baker, Columbia, Dixie, Franklin, Gadsden, Gilchrist and 11 more | 7 hr |
| Feb 18, 5:11 AM EST | Mesoscale Discussion | SPC | Baker, Columbia, Dixie, Franklin, Gadsden, Gilchrist and 12 more | 64 min |
| Feb 18, 7:43 AM EST | Mesoscale Discussion | SPC | Baker, Bradford, Columbia, Dixie, Gilchrist, Hamilton and 7 more | 62 min |
| Feb 18, 8:46 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Columbia, Gilchrist, Levy and 2 more | 29 min |
| Feb 18, 10:36 AM EST | Mesoscale Discussion | SPC | Flagler, Hernando, Lake, Marion, Orange, Pasco and 5 more | 84 min |
Nearby
Mesoscale Discussions in Georgia, 2008Mesoscale Discussions in Florida, 2008Every mesoscale discussion in 2008
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.