Alert archive / Florida / Mesoscale Discussions in 2009
Mesoscale Discussion 2295
The Storm Prediction Center issued this mesoscale discussion at Dec 25, 2009, 3:27 AM EST for 13 counties in Florida; 11 counties in Georgia. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Dec 25, 2009, 3:27 AM EST (08:27 UTC)
- Expired
- Dec 25, 2009, 4:30 AM EST
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 24 counties
Alachua County, FL, Baker County, FL, Citrus County, FL, Columbia County, FL, Dixie County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Levy County, FL, Madison County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Atkinson County, GA, Berrien County, GA, Brooks County, GA, Clinch County, GA, Coffee County, GA, Cook County, GA, Echols County, GA, Lanier County, GA, Lowndes County, GA, Tift County, GA, Ware 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
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.5 hours before the alert went out and 119 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
- 1 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 909 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 500 m²/s²
- 0-3 km storm-relative helicity
- 677 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Dec 24, 8:32 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Holmes, Jackson, Okaloosa, Walton and 1 more | 118 min |
| Dec 24, 10:45 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 4 more | 2 hr |
| Dec 25, 3:46 AM EST | Tornado Watch | SPC | Alachua, Baker, Bradford, Columbia, Dixie, Gilchrist and 8 more | 7 hr |
| Dec 25, 7:27 AM EST | Mesoscale Discussion | SPC | Baker, Columbia, Dixie, Gilchrist, Hamilton, Lafayette and 3 more | 93 min |
| Dec 25, 4:41 AM EST | Mesoscale Discussion | SPC | Appling, Bryan, Bulloch, Burke, Camden, Candler and 24 more | 64 min |
| Dec 25, 5:01 AM EST | Tornado Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Dodge and 20 more | 9 hr |
| Dec 25, 10:26 AM EST | Mesoscale Discussion | SPC | Appling, Bacon, Brantley, Camden, Charlton, Glynn and 3 more | 64 min |
| Dec 25, 11:39 AM EST | Mesoscale Discussion | SPC | Bryan, Chatham, Effingham, Liberty, McIntosh | 66 min |
Nearby
Mesoscale Discussions in Florida, 2009Mesoscale Discussions in Georgia, 2009Every mesoscale discussion in 2009
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.