Alert archive / Georgia / Tornado Watches in 2009
Tornado Watch 137
The Storm Prediction Center issued this tornado watch at Apr 10, 2009, 11:11 PM EDT for 28 counties in Georgia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2009, 11:11 PM EDT (03:11 UTC)
- Expired
- Apr 11, 2009, 2:56 AM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 28 counties
Appling County, GA, Atkinson County, GA, Bacon County, GA, Baker County, GA, Ben Hill County, GA, Berrien County, GA, Brantley County, GA, Calhoun County, GA, Clay County, GA, Coffee County, GA, Colquitt County, GA, Cook County, GA, Dougherty County, GA, Early County, GA, Irwin County, GA, Jeff Davis County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Pierce County, GA, Quitman County, GA, Randolph County, GA, Terrell 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- 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
- 80%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 11:59 PM EDT | Tornado Warning | TAE | Randolph, Terrell | 46 min |
| Apr 11, 12:26 AM EDT | Tornado Warning | TAE | Lee, Terrell | 49 min |
| Apr 11, 12:43 AM EDT | Tornado Warning | TAE | Ben Hill, Irwin, Turner | 47 min |
| Apr 11, 12:51 AM EDT | Tornado Warning | TAE | Lee, Turner, Worth | 39 min |
| Apr 11, 1:25 AM EDT | Tornado Warning | TAE | Turner, Worth | 35 min |
| Apr 11, 1:45 AM EDT | Severe Thunderstorm Warning | TAE | Ben Hill, Irwin, Turner | 45 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 00:00Z, 3.2 hours before the alert went out and 135 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
- 793 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 339 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 8:54 PM EDT | Mesoscale Discussion | SPC | Burke, Columbia, Jenkins, Lincoln, McDuffie, Richmond and 1 more | 66 min |
| Apr 10, 9:24 PM EDT | Tornado Watch | SPC | Burke | 5 hr |
| Apr 10, 10:28 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Bleckley, Butts, Chattahoochee, Clayton and 55 more | 92 min |
| Apr 10, 11:20 PM EDT | Severe Thunderstorm Watch | SPC | Bulloch, Candler, Effingham, Evans, Jenkins, Screven and 1 more | 6 hr |
| Apr 11, 12:49 AM EDT | Mesoscale Discussion | SPC | Bibb, Bleckley, Burke, Candler, Crawford, Dodge and 25 more | 56 min |
| Apr 11, 1:48 AM EDT | Mesoscale Discussion | SPC | Effingham, Screven | 57 min |
| Apr 11, 2:44 AM EDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 16 more | 31 min |
Nearby
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.