Alert archive / South Carolina / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 114
The Storm Prediction Center issued this severe thunderstorm watch at Apr 9, 2011, 2:44 PM EDT for 17 counties in Georgia; 13 counties in North Carolina; 41 counties in South Carolina. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 9, 2011, 2:44 PM EDT (18:44 UTC)
- Expired
- Apr 9, 2011, 9:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 71 counties
Bryan County, GA, Bulloch County, GA, Burke County, GA, Candler County, GA, Chatham County, GA, Columbia County, GA, Effingham County, GA, Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Jenkins County, GA, Lincoln County, GA, Rabun County, GA, Richmond County, GA, Screven County, GA, Stephens County, GA, Alexander County, NC, Anson County, NC, Cabarrus County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, Mecklenburg County, NC, Rowan County, NC, Stanly County, NC, Union County, NC, Abbeville County, SC, Aiken County, SC, Allendale County, SC, Anderson County, SC, Bamberg County, SC, Barnwell County, SC, Beaufort County, SC, Berkeley County, SC, Calhoun County, SC, Charleston County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Colleton County, SC, Darlington County, SC, Dorchester County, SC, Edgefield County, SC, Fairfield County, SC, Florence County, SC, Greenville County, SC, Greenwood County, SC, Hampton County, SC, Jasper County, SC, Kershaw County, SC, Lancaster County, SC, Laurens County, SC, Lee County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Oconee County, SC, Orangeburg County, SC, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, Williamsburg County, SC, York County, SC
The radar
The Columbia radar (KCAE), 49 km from the middle of the area, began a volume at 18:46 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 60%
- 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
- 90%
Warnings issued inside it
41 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 3:43 PM EDT | Severe Thunderstorm Warning | GSP | Rabun | 62 min |
| Apr 9, 3:58 PM EDT | Tornado Warning | GSP | Burke, Cleveland, McDowell, Rutherford | 47 min |
| Apr 9, 4:19 PM EDT | Tornado Warning | GSP | Cleveland, Gaston, Lincoln, Rutherford | 41 min |
| Apr 9, 4:29 PM EDT | Severe Thunderstorm Warning | GSP | Oconee, Pickens | 46 min |
| Apr 9, 4:52 PM EDT | Severe Thunderstorm Warning | GSP | Anderson, Greenville, Pickens | 53 min |
| Apr 9, 4:57 PM EDT | Tornado Warning | GSP | Cleveland, Gaston, Lincoln | 48 min |
| Apr 9, 5:19 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Lincoln, Rutherford | 56 min |
| Apr 9, 5:24 PM EDT | Tornado Warning | GSP | Gaston | 36 min |
| Apr 9, 5:26 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Mecklenburg, Union | 64 min |
| Apr 9, 5:30 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Lancaster | 60 min |
| Apr 9, 5:40 PM EDT | Severe Thunderstorm Warning | GSP | Anderson, Greenville, Laurens | 48 min |
| Apr 9, 5:43 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Gaston | 62 min |
| Apr 9, 5:53 PM EDT | Severe Thunderstorm Warning | GSP | Union | 52 min |
| Apr 9, 5:56 PM EDT | Severe Thunderstorm Warning | GSP | York | 34 min |
| Apr 9, 6:01 PM EDT | Tornado Warning | CAE | Lancaster | 44 min |
| Apr 9, 6:06 PM EDT | Tornado Warning | GSP | York | 12 min |
| Apr 9, 6:17 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Burke, Caldwell, Catawba, Cleveland, Lincoln | 28 min |
| Apr 9, 6:17 PM EDT | Severe Thunderstorm Warning | GSP | York | 58 min |
| Apr 9, 6:25 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg, Union | 65 min |
| Apr 9, 6:31 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Lancaster | 44 min |
| Apr 9, 6:41 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster | 49 min |
| Apr 9, 6:42 PM EDT | Severe Thunderstorm Warning | GSP | Union | 48 min |
| Apr 9, 6:47 PM EDT | Severe Thunderstorm Warning | GSP | Catawba, Cleveland, Gaston, Lincoln | 31 min |
| Apr 9, 7:00 PM EDT | Severe Thunderstorm Warning | GSP | Chester, York | 12 min |
| Apr 9, 7:03 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Iredell, Mecklenburg, Rowan | 40 min |
| Apr 9, 7:04 PM EDT | Severe Thunderstorm Warning | GSP | Burke, Cleveland, McDowell, Rutherford | 56 min |
| Apr 9, 7:10 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Florence | 65 min |
| Apr 9, 7:15 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster, Lee | 45 min |
| Apr 9, 7:20 PM EDT | Severe Thunderstorm Warning | RAH | Anson, Stanly | 40 min |
| Apr 9, 7:25 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg, Union | 38 min |
| Apr 9, 7:26 PM EDT | Severe Thunderstorm Warning | GSP | Burke, Catawba, Cleveland, Gaston, Lincoln, Rutherford | 41 min |
| Apr 9, 7:53 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Gaston | 67 min |
| Apr 9, 7:53 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Florence, Marion, Williamsburg | 67 min |
| Apr 9, 7:58 PM EDT | Severe Thunderstorm Warning | CAE | Lee, Sumter | 47 min |
| Apr 9, 8:08 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Rutherford | 30 min |
| Apr 9, 8:11 PM EDT | Severe Thunderstorm Warning | GSP | Greenville | 39 min |
| Apr 9, 8:29 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland | 34 min |
| Apr 9, 8:32 PM EDT | Severe Thunderstorm Warning | GSP | Chester, York | 43 min |
| Apr 9, 8:37 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster, Lee | 53 min |
| Apr 9, 8:56 PM EDT | Severe Thunderstorm Warning | GSP | Chester, Union, York | 64 min |
| Apr 9, 8:56 PM EDT | Severe Thunderstorm Warning | ILM | Florence, Georgetown, Horry, Marion, Williamsburg | 79 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 12:00Z, 6.7 hours before the alert went out and 202 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
- 2220 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 1:34 PM EDT | Mesoscale Discussion | SPC | Columbia, Elbert, Franklin, Habersham, Hart, Lincoln and 4 more | 86 min |
| Apr 8, 9:10 PM EDT | Mesoscale Discussion | SPC | Alamance, Caswell, Chatham, Davidson, Durham, Forsyth and 11 more | 65 min |
| Apr 8, 11:07 PM EDT | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Rockingham, Stokes, Surry, Watauga and 2 more | 6 hr |
| Apr 9, 12:42 AM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Alleghany, Ashe, Avery, Cabarrus and 23 more | 93 min |
| Apr 9, 3:23 AM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Burke, Cabarrus and 19 more | 67 min |
| Apr 9, 12:34 PM EDT | Severe Thunderstorm Watch | SPC | Alleghany, Ashe, Avery, Buncombe, Burke, Caldwell and 17 more | 4 hr |
| Apr 9, 2:00 PM EDT | Tornado Watch | SPC | Alleghany, Ashe, Avery, Buncombe, Burke, Caldwell and 17 more | 7 hr |
| Apr 9, 4:21 PM EDT | Mesoscale Discussion | SPC | Ashe, Avery, Buncombe, Burke, Caldwell, Cherokee and 15 more | 84 min |
| Apr 9, 5:36 PM EDT | Mesoscale Discussion | SPC | Cleveland, Gaston, Lincoln, Mecklenburg, Polk, Rutherford and 1 more | 54 min |
| Apr 9, 6:16 PM EDT | Tornado Watch | SPC | Buncombe, Burke, Cleveland, Gaston, Haywood, Henderson and 10 more | 6 hr |
| Apr 9, 7:59 PM EDT | Mesoscale Discussion | SPC | Anson, Buncombe, Burke, Cabarrus, Catawba, Cleveland and 13 more | 61 min |
Nearby
Severe Thunderstorm Watches in South Carolina, 2011Severe Thunderstorm Watches in Georgia, 2011Severe Thunderstorm Watches in North 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.