Alert archive / South Carolina / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 229
The Storm Prediction Center issued this severe thunderstorm watch at Jun 27, 2018, 3:36 PM EDT for 10 counties in Georgia; 5 counties in North Carolina; 25 counties in South Carolina. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 27, 2018, 3:36 PM EDT (19:36 UTC)
- Expired
- Jun 27, 2018, 9:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 40 counties
Columbia County, GA, Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Lincoln County, GA, McDuffie County, GA, Rabun County, GA, Richmond County, GA, Stephens County, GA, Cleveland County, NC, Gaston County, NC, Lincoln County, NC, Mecklenburg County, NC, Union County, NC, Abbeville County, SC, Aiken County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Greenville County, SC, Greenwood 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, Pickens County, SC, Richland County, SC, Saluda County, SC, Spartanburg County, SC, Sumter County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 22 km from the middle of the area, began a volume at 19:37 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 3:43 PM EDT | Severe Thunderstorm Warning | GSP | Cleveland, Rutherford | 47 min |
| Jun 27, 3:43 PM EDT | Severe Thunderstorm Warning | GSP | Anderson, Oconee, Pickens | 47 min |
| Jun 27, 3:52 PM EDT | Severe Thunderstorm Warning | GSP | Greenville, Spartanburg | 38 min |
| Jun 27, 4:01 PM EDT | Severe Thunderstorm Warning | GSP | Greenville, Pickens | 44 min |
| Jun 27, 4:23 PM EDT | Severe Thunderstorm Warning | GSP | Abbeville, Anderson, Greenville | 52 min |
| Jun 27, 4:27 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee, York | 48 min |
| Jun 27, 4:29 PM EDT | Severe Thunderstorm Warning | GSP | Greenville, Spartanburg | 46 min |
| Jun 27, 4:49 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee, Greenville, Laurens, Spartanburg, Union | 41 min |
| Jun 27, 5:00 PM EDT | Severe Thunderstorm Warning | GSP | Abbeville, Anderson, Greenville, Greenwood, Laurens | 45 min |
| Jun 27, 5:13 PM EDT | Severe Thunderstorm Warning | GSP | Chester, York | 47 min |
| Jun 27, 5:18 PM EDT | Severe Thunderstorm Warning | GSP | Cherokee, Chester, Laurens, Spartanburg, Union, York | 42 min |
| Jun 27, 5:35 PM EDT | Severe Thunderstorm Warning | CAE | Lancaster | 55 min |
| Jun 27, 5:47 PM EDT | Severe Thunderstorm Warning | GSP | Chester, Union, York | 43 min |
| Jun 27, 6:09 PM EDT | Severe Thunderstorm Warning | GSP | Elbert | 26 min |
| Jun 27, 6:28 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster | 32 min |
| Jun 27, 6:55 PM EDT | Severe Thunderstorm Warning | CAE | Chesterfield, Kershaw, Lancaster | 50 min |
| Jun 27, 7:29 PM EDT | Severe Thunderstorm Warning | CAE | Kershaw, Lee, Richland, Sumter | 46 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, 7.6 hours before the alert went out and 247 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
- 17 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 43 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 |
|---|---|---|---|---|
| Jun 27, 2:29 PM EDT | Mesoscale Discussion | SPC | Banks, Catoosa, Fannin, Franklin, Gilmer, Habersham and 9 more | 3 hr |
| Jun 27, 5:55 PM EDT | Mesoscale Discussion | SPC | Columbia, Elbert, Lincoln, McDuffie, Richmond, Wilkes | 2 hr |
| Jun 27, 6:24 PM EDT | Mesoscale Discussion | SPC | Baldwin, Banks, Barrow, Bibb, Butts, Carroll and 41 more | 2 hr |
Nearby
Severe Thunderstorm Watches in South Carolina, 2018Severe Thunderstorm Watches in Georgia, 2018Severe Thunderstorm Watches in North Carolina, 2018Every severe thunderstorm 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.