Alert archive / Georgia / Tornado Watches in 2009
Tornado Watch 94
The Storm Prediction Center issued this tornado watch at Mar 28, 2009, 7:29 PM CDT for 8 counties in Alabama; 13 counties in Georgia; 7 counties in Tennessee. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 28, 2009, 7:29 PM CDT (00:29 UTC)
- Expired
- Mar 28, 2009, 11:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 28 counties
Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Etowah County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL, Bartow County, GA, Carroll County, GA, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Floyd County, GA, Gordon County, GA, Haralson County, GA, Murray County, GA, Paulding County, GA, Polk County, GA, Walker County, GA, Whitfield County, GA, Bledsoe County, TN, Bradley County, TN, Hamilton County, TN, Marion County, TN, Meigs County, TN, Rhea County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 64 km from the middle of the area, began a volume at 00:29 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 7:47 PM CDT | Tornado Warning | BMX | Calhoun, Etowah, St. Clair | 17 min |
| Mar 28, 8:09 PM CDT | Severe Thunderstorm Warning | MRX | Bledsoe, Marion, Sequatchie | 66 min |
| Mar 28, 8:14 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Clay, Cleburne, Talladega | 22 min |
| Mar 28, 8:16 PM CDT | Tornado Warning | FFC | Chattooga, Dade, Walker | 44 min |
| Mar 28, 8:22 PM CDT | Severe Thunderstorm Warning | BMX | Calhoun, Cherokee, Etowah | 29 min |
| Mar 28, 8:31 PM CDT | Severe Thunderstorm Warning | FFC | Chattooga, Floyd, Polk | 59 min |
| Mar 28, 8:54 PM CDT | Severe Thunderstorm Warning | FFC | Catoosa, Walker, Whitfield | 51 min |
| Mar 28, 9:09 PM CDT | Severe Thunderstorm Warning | MRX | Bledsoe, Rhea | 51 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 0.5 hours before the alert went out and 168 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
- 129 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 523 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 28, 7:21 PM CDT | Mesoscale Discussion | SPC | DeKalb, Jackson, Madison | 54 min |
| Mar 28, 9:42 PM CDT | Mesoscale Discussion | SPC | Calhoun, Cherokee, Clay, Cleburne, DeKalb, Randolph | 63 min |
| Mar 28, 11:48 PM CDT | Mesoscale Discussion | SPC | Brantley, Bryan, Bulloch, Camden, Charlton, Chatham and 10 more | 87 min |
Nearby
Tornado Watches in Georgia, 2009Tornado Watches in Alabama, 2009Tornado Watches in Tennessee, 2009Every tornado watch 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; radar from the NEXRAD Level II archive.