Alert archive / Georgia / Tornado Watches in 2013
Tornado Watch 102
The Storm Prediction Center issued this tornado watch at Apr 12, 2013, 1:06 AM EDT for 28 counties in Georgia; 6 counties in North Carolina; 28 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 12, 2013, 1:06 AM EDT (05:06 UTC)
- Expired
- Apr 12, 2013, 7:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 62 counties
Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Burke County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Jenkins County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Richmond County, GA, Screven County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA, Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Robeson County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dillon County, SC, Dorchester County, SC, Florence County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Kershaw County, SC, Lee County, SC, Lexington County, SC, Marion County, SC, Marlboro County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC, Williamsburg County, SC
The radar
The Columbia radar (KCAE), 69 km from the middle of the area, began a volume at 05:06 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
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 1:20 AM EDT | Severe Thunderstorm Warning | CAE | Aiken, Lexington | 40 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 5.1 hours before the alert went out and 319 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
- 29 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1610 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 100 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 |
|---|---|---|---|---|
| Apr 11, 8:24 PM EDT | Tornado Watch | SPC | Baker, Baldwin, Banks, Barrow, Bartow, Ben Hill and 121 more | 8 hr |
| Apr 11, 10:52 PM EDT | Mesoscale Discussion | SPC | Baker, Baldwin, Banks, Barrow, Bibb, Bleckley and 75 more | 83 min |
| Apr 12, 12:46 AM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Effingham and 5 more | 89 min |
| Apr 11, 9:19 PM EDT | Mesoscale Discussion | SPC | Cherokee, Graham, Haywood, Jackson, Macon, Madison and 1 more | 86 min |
| Apr 12, 1:58 AM EDT | Mesoscale Discussion | SPC | Alamance, Bertie, Caswell, Chatham, Cumberland, Davidson and 34 more | 92 min |
| Apr 12, 2:57 AM EDT | Tornado Watch | SPC | Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 25 more | 6 hr |
| Apr 12, 4:00 AM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson and 1 more | 90 min |
| Apr 12, 5:21 AM EDT | Tornado Watch | SPC | Northampton | 3 hr |
| Apr 12, 7:25 AM EDT | Mesoscale Discussion | SPC | Edgecombe, Franklin, Greene, Halifax, Johnston, Nash and 6 more | 65 min |
| Apr 12, 2:34 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Camden, Chowan, Columbus and 15 more | 116 min |
Nearby
Tornado Watches in Georgia, 2013Tornado Watches in South Carolina, 2013Tornado Watches in North Carolina, 2013Every tornado watch in 2013
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.