Alert archive / Georgia / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 34
The Storm Prediction Center issued this severe thunderstorm watch at Feb 28, 2011, 5:04 PM EST for 39 counties in Georgia; 31 counties in North Carolina; 18 counties in South Carolina. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 28, 2011, 5:04 PM EST (22:04 UTC)
- Expired
- Feb 28, 2011, 10:00 PM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 88 counties
Baldwin County, GA, Bibb County, GA, Burke County, GA, Butts County, GA, Chattahoochee County, GA, Columbia County, GA, Crawford County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Lamar County, GA, Lincoln County, GA, Macon County, GA, Marion County, GA, McDuffie County, GA, Monroe County, GA, Morgan County, GA, Muscogee County, GA, Oglethorpe County, GA, Peach County, GA, Putnam County, GA, Richmond County, GA, Schley County, GA, Stewart County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wilkes County, GA, Wilkinson County, GA, Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chesterfield County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster 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
The radar
The Columbia radar (KCAE), 114 km from the middle of the area, began a volume at 22:04 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
- 5%
- Ten or more severe wind reports
- 30%
- 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
- 60%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 5:07 PM EST | Severe Thunderstorm Warning | RAH | Davidson, Forsyth | 38 min |
| Feb 28, 5:26 PM EST | Severe Thunderstorm Warning | RAH | Guilford, Randolph | 49 min |
| Feb 28, 6:01 PM EST | Severe Thunderstorm Warning | RAH | Alamance, Chatham | 44 min |
| Feb 28, 6:19 PM EST | Severe Thunderstorm Warning | CAE | Lancaster | 56 min |
| Feb 28, 6:28 PM EST | Severe Thunderstorm Warning | CAE | Lincoln | 62 min |
| Feb 28, 6:45 PM EST | Severe Thunderstorm Warning | CAE | Fairfield, Lancaster, Lexington, Newberry, Saluda | 45 min |
| Feb 28, 7:05 PM EST | Severe Thunderstorm Warning | RAH | Cumberland, Harnett, Hoke, Montgomery, Moore, Richmond | 55 min |
| Feb 28, 7:13 PM EST | Tornado Warning | CAE | Fairfield, Lexington, Newberry, Richland, Saluda | 47 min |
| Feb 28, 7:18 PM EST | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster | 57 min |
| Feb 28, 7:24 PM EST | Severe Thunderstorm Warning | CAE | Lincoln | 29 min |
| Feb 28, 7:28 PM EST | Severe Thunderstorm Warning | CAE | Aiken, Chesterfield, Fairfield, Kershaw, Lancaster, Lexington and 3 more | 62 min |
| Feb 28, 8:11 PM EST | Severe Thunderstorm Warning | CAE | Chesterfield | 23 min |
| Feb 28, 8:49 PM EST | Severe Thunderstorm Warning | CAE | Clarendon, Lee, Sumter | 29 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 12:00Z, 10.1 hours before the alert went out and 154 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
- 948 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 425 m²/s²
- 0-3 km storm-relative helicity
- 499 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 |
|---|---|---|---|---|
| Feb 28, 1:29 PM EST | Tornado Watch | SPC | Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 48 more | 7 hr |
| Feb 28, 4:36 PM EST | Mesoscale Discussion | SPC | Banks, Barrow, Bartow, Butts, Carroll, Chattahoochee and 51 more | 84 min |
| Feb 28, 6:42 PM EST | Mesoscale Discussion | SPC | Baldwin, Bibb, Butts, Columbia, Crawford, Glascock and 21 more | 93 min |
| Feb 28, 12:25 PM EST | Mesoscale Discussion | SPC | Graham, Swain | 95 min |
Nearby
Severe Thunderstorm Watches in Georgia, 2011Severe Thunderstorm Watches in North Carolina, 2011Severe Thunderstorm Watches in South Carolina, 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; radar from the NEXRAD Level II archive.