Alert archive / Georgia / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 69
The Storm Prediction Center issued this severe thunderstorm watch at Mar 27, 2011, 3:27 PM CDT for 7 counties in Alabama; 22 counties in Florida; 44 counties in Georgia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2011, 3:27 PM CDT (20:27 UTC)
- Expired
- Mar 27, 2011, 8:48 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 73 counties
Coffee County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Columbia County, FL, Escambia County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Hamilton County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Santa Rosa County, FL, Suwannee County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Bryan County, GA, Calhoun County, GA, Camden County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Echols County, GA, Evans County, GA, Glynn County, GA, Grady County, GA, Irwin County, GA, Jeff Davis County, GA, Lanier County, GA, Lee County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Seminole County, GA, Tattnall County, GA, Terrell County, GA, Thomas County, GA, Tift County, GA, Turner County, GA, Ware County, GA, Wayne County, GA, Worth 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
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 3:29 PM CDT | Severe Thunderstorm Warning | JAX | Appling, Jeff Davis | 33 min |
| Mar 27, 3:35 PM CDT | Severe Thunderstorm Warning | TAE | Dale, Geneva, Henry, Houston | 40 min |
| Mar 27, 3:36 PM CDT | Severe Thunderstorm Warning | TAE | Coffee, Dale, Geneva, Houston | 39 min |
| Mar 27, 3:37 PM CDT | Severe Thunderstorm Warning | CHS | Bryan, Bulloch, Evans, Liberty, Long, Tattnall | 53 min |
| Mar 27, 3:53 PM CDT | Severe Thunderstorm Warning | CHS | Chatham | 48 min |
| Mar 27, 4:09 PM CDT | Severe Thunderstorm Warning | CHS | Bryan, Chatham, Effingham, Liberty | 31 min |
| Mar 27, 4:14 PM CDT | Severe Thunderstorm Warning | TAE | Coffee, Dale, Geneva, Houston | 46 min |
| Mar 27, 4:17 PM CDT | Severe Thunderstorm Warning | TAE | Houston | 43 min |
| Mar 27, 4:26 PM CDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 39 min |
| Mar 27, 4:45 PM CDT | Severe Thunderstorm Warning | TAE | Baker, Decatur, Grady, Miller, Mitchell | 45 min |
| Mar 27, 4:46 PM CDT | Severe Thunderstorm Warning | MOB | Covington | 29 min |
| Mar 27, 4:48 PM CDT | Severe Thunderstorm Warning | TAE | Geneva | 42 min |
| Mar 27, 5:00 PM CDT | Severe Thunderstorm Warning | TAE | Houston | 14 min |
| Mar 27, 5:31 PM CDT | Severe Thunderstorm Warning | TAE | Grady, Thomas | 44 min |
| Mar 27, 5:49 PM CDT | Severe Thunderstorm Warning | TAE | Berrien, Brooks, Cook, Lowndes | 41 min |
| Mar 27, 6:15 PM CDT | Severe Thunderstorm Warning | TAE | Brooks, Thomas | 30 min |
| Mar 27, 6:17 PM CDT | Severe Thunderstorm Warning | TAE | Berrien, Brooks, Lanier, Lowndes | 43 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 8.5 hours before the alert went out and 114 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
- 1068 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 7:47 PM CDT | Tornado Watch | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more | 7 hr |
| Mar 26, 11:21 PM CDT | Mesoscale Discussion | SPC | Bibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 17 more | 54 min |
| Mar 27, 7:33 AM CDT | Mesoscale Discussion | SPC | Autauga, Bibb, Chambers, Chilton, Clay, Coosa and 16 more | 117 min |
| Mar 27, 8:55 AM CDT | Severe Thunderstorm Watch | SPC | Autauga, Barbour, Bullock, Butler, Chambers, Chilton and 17 more | 7 hr |
| Mar 27, 10:51 AM CDT | Mesoscale Discussion | SPC | Barbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more | 84 min |
| Mar 27, 2:49 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Covington, Dale, Geneva, Henry and 1 more | 56 min |
| Mar 27, 6:24 PM CDT | Mesoscale Discussion | SPC | Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 4 more | 2 hr |
| Mar 26, 7:55 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Catoosa, Chattooga, Cherokee and 36 more | 95 min |
| Mar 26, 8:19 PM CDT | Severe Thunderstorm Watch | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 39 more | 8 hr |
| Mar 26, 10:10 PM CDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 3 more | 65 min |
| Mar 26, 11:43 PM CDT | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Burke, Catoosa, Chattooga and 38 more | 62 min |
| Mar 27, 2:03 AM CDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Bibb, Bleckley and 40 more | 57 min |
| Mar 27, 2:25 AM CDT | Tornado Watch | SPC | Appling, Baldwin, Bibb, Bleckley, Bryan, Bulloch and 46 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Georgia, 2011Severe Thunderstorm Watches in Florida, 2011Severe Thunderstorm Watches in Alabama, 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.