Alert archive / South Carolina / Tornado Watches in 2018
Tornado Watch 52
The Storm Prediction Center issued this tornado watch at Apr 15, 2018, 12:13 PM EDT for 4 states. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2018, 12:13 PM EDT (16:13 UTC)
- Expired
- Apr 15, 2018, 8:49 PM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 67 counties
Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Alexander County, NC, Alleghany County, NC, Ashe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Iredell County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Surry County, NC, Union County, NC, Watauga County, NC, Wilkes County, NC, Yadkin 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, Dorchester County, SC, Edgefield County, SC, Fairfield 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, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, York County, SC, Carroll County, VA, City of Galax, VA, Floyd County, VA, Grayson County, VA
The radar
The Columbia radar (KCAE), 115 km from the middle of the area, began a volume at 16:16 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
- 70%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 12:13 PM EDT | Severe Thunderstorm Warning | GSP | Greenwood, Laurens | 47 min |
| Apr 15, 12:19 PM EDT | Severe Thunderstorm Warning | GSP | Laurens, Spartanburg | 41 min |
| Apr 15, 12:29 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Rutherford | 46 min |
| Apr 15, 12:31 PM EDT | Flash Flood Warning | GSP | Cherokee, Greenwood, Laurens, Spartanburg | 3 hr |
| Apr 15, 12:38 PM EDT | Severe Thunderstorm Warning | GSP | Laurens, Spartanburg, Union | 52 min |
| Apr 15, 12:41 PM EDT | Severe Thunderstorm Warning | CAE | Columbia, Richmond | 34 min |
| Apr 15, 12:44 PM EDT | Flash Flood Warning | GSP | Burke, Caldwell, Cleveland, Polk, Rutherford | 4 hr |
| Apr 15, 12:47 PM EDT | Severe Thunderstorm Warning | GSP | Burke, Catawba, Cleveland, Lincoln, Rutherford | 28 min |
| Apr 15, 1:12 PM EDT | Severe Thunderstorm Warning | CAE | Burke | 33 min |
| Apr 15, 1:13 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Burke, Caldwell, Catawba, Cleveland, Lincoln | 32 min |
| Apr 15, 1:17 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee, Spartanburg, Union | 43 min |
| Apr 15, 1:36 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Ashe, Surry, Wilkes | 69 min |
| Apr 15, 1:42 PM EDT | Severe Thunderstorm Warning | CAE | Aiken, Lexington, Newberry, Saluda | 48 min |
| Apr 15, 2:09 PM EDT | Tornado Warning | CAE | Lexington | 21 min |
| Apr 15, 2:12 PM EDT | Severe Thunderstorm Warning | RNK | Alleghany, Surry, Wilkes, Yadkin | 63 min |
| Apr 15, 2:13 PM EDT | Severe Thunderstorm Warning | CAE | Aiken, Bamberg, Barnwell, Calhoun, Lexington, Orangeburg | 62 min |
| Apr 15, 2:18 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Fairfield, Lexington, Newberry, Richland | 57 min |
| Apr 15, 2:29 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee, Chester, Union, York | 46 min |
| Apr 15, 2:40 PM EDT | Severe Thunderstorm Warning | CAE | Fairfield, Kershaw, Lancaster, Richland | 65 min |
| Apr 15, 2:41 PM EDT | Severe Thunderstorm Warning | RNK | Bland, Carroll, Grayson, Pulaski, Wythe, City of Galax and 1 more | 64 min |
| Apr 15, 2:43 PM EDT | Tornado Warning | CAE | Fairfield | 17 min |
| Apr 15, 2:44 PM EDT | Severe Thunderstorm Warning | GSP | Gaston, Mecklenburg | 46 min |
| Apr 15, 2:51 PM EDT | Tornado Warning | CAE | Fairfield, Lancaster | 24 min |
| Apr 15, 3:01 PM EDT | Severe Thunderstorm Warning | CAE | Kershaw, Lancaster | 59 min |
| Apr 15, 3:02 PM EDT | Tornado Warning | GSP | Gaston, Mecklenburg | 28 min |
| Apr 15, 3:03 PM EDT | Severe Thunderstorm Warning | RNK | Surry, Wilkes, Yadkin | 42 min |
| Apr 15, 3:15 PM EDT | Severe Thunderstorm Warning | GSP | Mecklenburg, Union | 30 min |
| Apr 15, 3:25 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Catawba, Gaston, Iredell, Lincoln, Mecklenburg and 1 more | 37 min |
| Apr 15, 3:32 PM EDT | Severe Thunderstorm Warning | CAE | Calhoun, Clarendon, Kershaw, Lee, Orangeburg, Richland and 1 more | 58 min |
| Apr 15, 3:33 PM EDT | Severe Thunderstorm Warning | RNK | Stokes, Surry | 57 min |
| Apr 15, 3:41 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Mecklenburg, Rowan, Union | 34 min |
| Apr 15, 3:48 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield | 72 min |
| Apr 15, 3:55 PM EDT | Severe Thunderstorm Warning | GSP | Davie, Iredell, Rowan | 35 min |
| Apr 15, 3:57 PM EDT | Severe Thunderstorm Warning | RNK | Botetourt, Craig, Floyd, Franklin, Giles, Montgomery and 5 more | 63 min |
| Apr 15, 4:08 PM EDT | Severe Thunderstorm Warning | RNK | Rockingham, Stokes, Surry, Yadkin | 67 min |
| Apr 15, 4:14 PM EDT | Severe Thunderstorm Warning | GSP | Cabarrus, Rowan | 31 min |
| Apr 15, 5:12 PM EDT | Severe Thunderstorm Warning | RNK | Bedford, Botetourt, Floyd, Franklin, Henry, Patrick and 4 more | 63 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, 4.2 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
- 28 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 638 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
979 WWUS20 KWNS 151611 SEL2 SPC WW 151611 GAZ000-NCZ000-SCZ000-VAZ000-CWZ000-152300- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 52 NWS Storm Prediction Center Norman OK 1215 PM EDT Sun Apr 15 2018 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of East Georgia Western North Carolina South Carolina Far southern Virginia Coastal Waters * Effective this Sunday afternoon and evening from 1215 PM until 700 PM EDT. * Primary threats include... A few tornadoes likely Scattered damaging wind gusts to 70 mph likely SUMMARY...Bands of storms will continue to intensify and race northeastward through the afternoon and early evening. A highly sheared environment will support the possibility of line-embedded circulations capable of tornadoes aside from wind damage, especially with the more prominent bowing segments. The tornado watch area is approximately along and 50 statute miles east and west of a line from 75 miles north northeast of Hickory NC to 75 miles south southeast of Augusta GA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 51... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 21040. ...Guyer
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 11:58 PM EDT | Tornado Watch | SPC | Clay, Early, Miller, Quitman, Randolph, Seminole | 8 hr |
| Apr 15, 2:45 AM EDT | Mesoscale Discussion | SPC | Calhoun, Clay, Early, Miller, Quitman, Randolph and 1 more | 2 hr |
| Apr 15, 6:42 AM EDT | Mesoscale Discussion | SPC | Calhoun, Clay, Early, Miller, Randolph, Seminole | 93 min |
| Apr 15, 9:34 AM EDT | Mesoscale Discussion | SPC | Appling, Atkinson, Bacon, Ben Hill, Brantley, Camden and 17 more | 86 min |
| Apr 15, 10:12 AM EDT | Tornado Watch | SPC | Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 29 more | 8 hr |
| Apr 15, 2:30 PM EDT | Mesoscale Discussion | SPC | Glynn, McIntosh | 90 min |
| Apr 15, 11:15 AM EDT | Mesoscale Discussion | SPC | Alexander, Anson, Cabarrus, Catawba, Davidson, Davie and 11 more | 2 hr |
| Apr 15, 2:29 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Caswell, Chatham, Cumberland, Davidson and 20 more | 91 min |
| Apr 15, 3:02 PM EDT | Tornado Watch | SPC | Alamance, Anson, Bladen, Brunswick, Caswell, Chatham and 34 more | 8 hr |
| Apr 15, 3:17 PM EDT | Mesoscale Discussion | SPC | Anson, Cabarrus, Davidson, Davie, Forsyth, Rowan and 3 more | 88 min |
| Apr 15, 5:45 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Cabarrus, Caswell, Chatham, Cumberland and 24 more | 90 min |
| Apr 15, 6:28 PM EDT | Mesoscale Discussion | SPC | Cumberland, Franklin, Granville, Halifax, Johnston, Nash and 4 more | 62 min |
| Apr 15, 6:14 PM EDT | Tornado Watch | SPC | Amelia, Brunswick, Chesterfield, Cumberland, Dinwiddie, Fluvanna and 8 more | 7 hr |
Nearby
Tornado Watches in South Carolina, 2018Tornado Watches in North Carolina, 2018Tornado Watches in Georgia, 2018Every tornado watch in 2018
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.