Alert archive / Georgia / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 128
The Storm Prediction Center issued this severe thunderstorm watch at Apr 11, 2007, 11:01 PM EDT for 36 counties in Georgia; 26 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 11, 2007, 11:01 PM EDT (03:01 UTC)
- Expired
- Apr 12, 2007, 4:36 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 62 counties
Baldwin County, GA, Bleckley County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Columbia County, GA, Dodge County, GA, Emanuel County, GA, Evans County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Jasper County, GA, Jefferson County, GA, Jenkins County, GA, Johnson County, GA, Jones County, GA, Laurens County, GA, Lincoln County, GA, McDuffie County, GA, Montgomery County, GA, Oglethorpe County, GA, Putnam County, GA, Richmond County, GA, Screven County, GA, Taliaferro County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Warren County, GA, Washington County, GA, Wheeler County, GA, Wilkes County, GA, Wilkinson County, GA, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Greenwood County, SC, Hampton County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, Union County, SC, York County, SC
The radar
The Columbia radar (KCAE), 106 km from the middle of the area, began a volume at 03:02 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 60%
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 |
|---|---|---|---|---|
| Apr 11, 11:52 PM EDT | Severe Thunderstorm Warning | GSP | Laurens | 23 min |
| Apr 12, 12:34 AM EDT | Severe Thunderstorm Warning | CAE | Newberry, Saluda | 26 min |
| Apr 12, 12:42 AM EDT | Severe Thunderstorm Warning | GSP | Chester, York | 33 min |
| Apr 12, 1:00 AM EDT | Severe Thunderstorm Warning | CAE | Newberry | 30 min |
| Apr 12, 1:05 AM EDT | Severe Thunderstorm Warning | CAE | Lancaster | 25 min |
| Apr 12, 1:27 AM EDT | Severe Thunderstorm Warning | FFC | Warren | 18 min |
| Apr 12, 1:35 AM EDT | Severe Thunderstorm Warning | FFC | Washington | 25 min |
| Apr 12, 2:14 AM EDT | Severe Thunderstorm Warning | CAE | Aiken | 31 min |
| Apr 12, 2:39 AM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Lexington, Orangeburg | 36 min |
| Apr 12, 2:44 AM EDT | Severe Thunderstorm Warning | FFC | Jefferson | 31 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
Charleston AFB, SC (KCHS), launched 00:00Z, 3.0 hours before the alert went out and 206 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
- 289 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 9:39 PM EDT | Mesoscale Discussion | SPC | Appling, Bryan, Bulloch, Burke, Candler, Chatham and 13 more | 96 min |
| Apr 11, 10:43 PM EDT | Mesoscale Discussion | SPC | Baldwin, Burke, Clarke, Columbia, Elbert, Glascock and 16 more | 62 min |
| Apr 12, 4:01 AM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 4 more | 89 min |
| Apr 12, 12:16 AM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Bladen, Cabarrus, Chatham, Cumberland and 31 more | 89 min |
| Apr 12, 12:55 AM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Bertie, Bladen, Cabarrus, Caswell and 40 more | 3 hr |
| Apr 12, 2:39 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 35 more | 66 min |
| Apr 12, 3:25 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 36 more | 8 hr |
| Apr 12, 6:18 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 20 more | 57 min |
| Apr 12, 8:25 AM EDT | Mesoscale Discussion | SPC | Beaufort, Camden, Carteret, Craven, Currituck, Dare and 6 more | 95 min |
Nearby
Severe Thunderstorm Watches in Georgia, 2007Severe Thunderstorm Watches in South Carolina, 2007Every severe thunderstorm watch in 2007
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.