Alert archive / South Carolina / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 288
The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2017, 12:13 AM EDT for 6 counties in Georgia; Union County, North Carolina; 15 counties in South Carolina. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 28, 2017, 12:13 AM EDT (04:13 UTC)
- Expired
- May 28, 2017, 3:32 AM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 55 kt
All 22 counties
Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Union County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Fairfield County, SC, Greenville County, SC, Greenwood County, SC, Lancaster County, SC, Laurens County, SC, Newberry County, SC, Oconee County, SC, Pickens County, SC, Spartanburg County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 11 km from the middle of the area, began a volume at 04:16 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 12:18 AM EDT | Severe Thunderstorm Warning | GSP | Greenville, Spartanburg | 57 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 00:00Z, 4.2 hours before the alert went out and 258 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
- 1002 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1611 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 10:07 PM EDT | Severe Thunderstorm Watch | SPC | Banks, Bartow, Catoosa, Chattooga, Cherokee, Dade and 17 more | 8 hr |
| May 27, 11:16 PM EDT | Mesoscale Discussion | SPC | Elbert, Franklin, Habersham, Hart, Rabun, Stephens | 89 min |
| May 28, 3:11 AM EDT | Mesoscale Discussion | SPC | Carroll, Floyd, Haralson, Heard, Polk | 2 hr |
| May 28, 3:53 AM EDT | Severe Thunderstorm Watch | SPC | Butts, Carroll, Clayton, Cobb, Coweta, DeKalb and 16 more | 4 hr |
| May 28, 6:29 AM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Butts, Clayton, Cobb, Coweta and 21 more | 2 hr |
| May 27, 9:00 PM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Dare, Edgecombe and 11 more | 30 min |
| May 27, 10:46 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 33 more | 89 min |
| May 28, 2:17 AM EDT | Mesoscale Discussion | SPC | Cabarrus, Chatham, Davidson, Davie, Harnett, Hoke and 9 more | 58 min |
| May 28, 2:27 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 5 more | 63 min |
| May 28, 4:56 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, Robeson | 2 hr |
| May 28, 7:06 PM EDT | Severe Thunderstorm Watch | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson | 4 hr |
Nearby
Severe Thunderstorm Watches in South Carolina, 2017Severe Thunderstorm Watches in Georgia, 2017Severe Thunderstorm Watches in North Carolina, 2017Every severe thunderstorm watch in 2017
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.