Alert archive / South Carolina / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 106
The Storm Prediction Center issued this severe thunderstorm watch at Mar 24, 2012, 1:53 PM EDT for 38 counties in South Carolina. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 24, 2012, 1:53 PM EDT (17:53 UTC)
- Expired
- Mar 24, 2012, 8:54 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 38 counties
Aiken County, SC, Allendale 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, Georgetown 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, Marlboro County, SC, McCormick County, SC, Newberry County, SC, Orangeburg 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), 17 km from the middle of the area, began a volume at 17:54 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
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 2:13 PM EDT | Severe Thunderstorm Warning | CHS | Beaufort, Charleston, Colleton, Dorchester, Jasper | 62 min |
| Mar 24, 2:36 PM EDT | Tornado Warning | CHS | Charleston, Colleton, Dorchester | 23 min |
| Mar 24, 2:37 PM EDT | Severe Thunderstorm Warning | CAE | Aiken, Calhoun, Lexington, Orangeburg | 38 min |
| Mar 24, 3:16 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Lexington, Richland, Sumter | 59 min |
| Mar 24, 3:52 PM EDT | Severe Thunderstorm Warning | GSP | York | 36 min |
| Mar 24, 4:04 PM EDT | Severe Thunderstorm Warning | GSP | York | 41 min |
| Mar 24, 4:39 PM EDT | Severe Thunderstorm Warning | CAE | Newberry | 51 min |
| Mar 24, 4:39 PM EDT | Severe Thunderstorm Warning | GSP | Chester, Laurens, Union | 31 min |
| Mar 24, 5:00 PM EDT | Severe Thunderstorm Warning | GSP | Chester, York | 24 min |
| Mar 24, 5:06 PM EDT | Severe Thunderstorm Warning | CAE | Lexington, Richland | 39 min |
| Mar 24, 5:08 PM EDT | Severe Thunderstorm Warning | GSP | Chester, Union, York | 35 min |
| Mar 24, 5:13 PM EDT | Severe Thunderstorm Warning | CAE | Edgefield, Fairfield, Lexington, Newberry, Richland, Saluda | 47 min |
| Mar 24, 5:40 PM EDT | Severe Thunderstorm Warning | CAE | Fairfield | 35 min |
| Mar 24, 5:59 PM EDT | Severe Thunderstorm Warning | CAE | Aiken, Fairfield, Lexington, Richland | 46 min |
| Mar 24, 5:59 PM EDT | Severe Thunderstorm Warning | GSP | Chester | 10 min |
| Mar 24, 6:02 PM EDT | Severe Thunderstorm Warning | CAE | Fairfield, Lancaster | 43 min |
| Mar 24, 6:41 PM EDT | Severe Thunderstorm Warning | CAE | Fairfield, Kershaw, Lexington, Richland | 49 min |
| Mar 24, 6:42 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Lancaster | 48 min |
| Mar 24, 7:21 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Kershaw, Lee, Richland, Sumter | 39 min |
| Mar 24, 7:43 PM EDT | Severe Thunderstorm Warning | CAE | Bamberg, Barnwell | 47 min |
| Mar 24, 8:00 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Kershaw, Lee, Richland, Sumter | 45 min |
| Mar 24, 8:29 PM EDT | Severe Thunderstorm Warning | CAE | Bamberg, Barnwell, Orangeburg | 46 min |
| Mar 24, 8:51 PM EDT | Tornado Warning | CAE | Bamberg, Orangeburg | 39 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, 5.9 hours before the alert went out and 164 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
- 588 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 24, 12:03 PM EDT | Mesoscale Discussion | SPC | Alamance, Alexander, Alleghany, Anson, Cabarrus, Caswell and 20 more | 117 min |
| Mar 24, 12:46 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Alexander, Alleghany, Anson, Ashe, Avery and 33 more | 7 hr |
| Mar 24, 2:31 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Burke, Caldwell and 4 more | 59 min |
| Mar 24, 2:54 PM EDT | Mesoscale Discussion | SPC | Caswell, Forsyth, Guilford, Rockingham, Stokes, Surry and 1 more | 66 min |
| Mar 24, 3:38 PM EDT | Tornado Watch | SPC | Alamance, Anson, Caswell, Chatham, Cumberland, Davidson and 30 more | 7 hr |
| Mar 24, 4:16 PM EDT | Mesoscale Discussion | SPC | Cabarrus, Davidson, Davie, Forsyth, Iredell, Mecklenburg and 6 more | 59 min |
| Mar 24, 6:03 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 24 more | 2 hr |
| Mar 24, 6:43 PM EDT | Tornado Watch | SPC | Caswell, Rockingham | 4 hr |
| Mar 24, 6:58 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Burke, Cabarrus, Caldwell, Catawba and 9 more | 92 min |
| Mar 24, 7:34 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Caswell, Chatham, Cumberland, Durham and 23 more | 116 min |
| Mar 24, 12:29 PM EDT | Mesoscale Discussion | SPC | Beaufort, Colleton, Hampton, Jasper | 61 min |
| Mar 24, 7:21 PM EDT | Mesoscale Discussion | SPC | Aiken, Bamberg, Barnwell, Berkeley, Calhoun, Charleston and 17 more | 84 min |
Nearby
Severe Thunderstorm Watches in South Carolina, 2012Every severe thunderstorm watch in 2012
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.