Alert archive / Georgia / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 48
The Storm Prediction Center issued this severe thunderstorm watch at Mar 9, 2011, 2:21 PM EST for 35 counties in Georgia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2011, 2:21 PM EST (19:21 UTC)
- Expired
- Mar 9, 2011, 8:00 PM EST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 35 counties
Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Dodge County, GA, Echols County, GA, Effingham County, GA, Emanuel County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Jenkins County, GA, Johnson County, GA, Laurens County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Montgomery County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 2:44 PM EST | Severe Thunderstorm Warning | FFC | Emanuel, Johnson, Laurens, Montgomery, Treutlen, Wheeler | 46 min |
| Mar 9, 2:57 PM EST | Severe Thunderstorm Warning | FFC | Dodge, Montgomery, Telfair, Wheeler | 48 min |
| Mar 9, 3:06 PM EST | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 54 min |
| Mar 9, 3:24 PM EST | Severe Thunderstorm Warning | FFC | Emanuel, Treutlen | 51 min |
| Mar 9, 3:31 PM EST | Severe Thunderstorm Warning | CHS | Bulloch, Candler, Evans, Jenkins, Long, Screven and 1 more | 59 min |
| Mar 9, 3:34 PM EST | Severe Thunderstorm Warning | FFC | Montgomery, Toombs | 41 min |
| Mar 9, 3:34 PM EST | Severe Thunderstorm Warning | JAX | Appling, Atkinson, Bacon, Coffee, Ware | 56 min |
| Mar 9, 3:57 PM EST | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis, Wayne | 48 min |
| Mar 9, 4:36 PM EST | Severe Thunderstorm Warning | CHS | Liberty, Long, McIntosh, Tattnall | 54 min |
| Mar 9, 4:47 PM EST | Severe Thunderstorm Warning | JAX | Appling, Bacon, Brantley, Glynn, Pierce, Wayne | 49 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
Jacksonville, FL (KJAX), launched 12:00Z, 7.4 hours before the alert went out and 124 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 9:32 AM EST | Mesoscale Discussion | SPC | Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 18 more | 28 min |
| Mar 9, 9:39 AM EST | Tornado Watch | SPC | Baker, Ben Hill, Berrien, Brooks, Calhoun, Clay and 20 more | 7 hr |
| Mar 9, 10:31 AM EST | Mesoscale Discussion | SPC | Baker, Brooks, Calhoun, Colquitt, Decatur, Dougherty and 6 more | 59 min |
| Mar 9, 1:38 PM EST | Mesoscale Discussion | SPC | Baker, Ben Hill, Berrien, Brooks, Colquitt, Cook and 14 more | 67 min |
| Mar 9, 2:04 PM EST | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Bleckley and 34 more | 26 min |
| Mar 9, 4:14 PM EST | Mesoscale Discussion | SPC | Echols, Lowndes | 31 min |
| Mar 9, 4:38 PM EST | Mesoscale Discussion | SPC | Brantley, Bryan, Bulloch, Camden, Charlton, Chatham and 14 more | 67 min |
Nearby
Severe Thunderstorm Watches in Georgia, 2011Every severe thunderstorm watch in 2011
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.