Multiple supercell thunderstorms developed across upstate South Carolina during the afternoon. Two tornadoes developed across the Piedmont, including one significant tornado that produced the longest tornado track in the Upstate in almost 30 years.

Tornado in YORK, SOUTH CAROLINA
From 03-MAY-21 11:39:00 to 03-MAY-21 11:40:00 (EST-5)
Location: SMYRNA
Tornado F-scale: EF1
Property damage: 350.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Nws storm survey found the path of a weak tornado along Highway 55 in far western York County. The tornado touched down in an open field just east of Clark Fork, before moving east northeast through a cluster of outbuildings at a farm site. One of these was completely destroyed, and two others severely damaged. 4000 turkeys housed here were killed. Two other buildings lost metal roof panels, and roof debris was carried along the path of the tornado. The only damage along the remainder of the path was numerous snapped and/or uprooted trees and downed limbs. The tornado lifted about one half mile west of the intersection of Highway 55 and Enon Church Rd.

Tornado in ABBEVILLE, SOUTH CAROLINA
From 03-MAY-21 13:04:00 to 03-MAY-21 13:48:00 (EST-5)
Location: LOWNDESVILLE
Tornado F-scale: EF2
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS storm survey found the path of a significant tornado that began just of Russel Lake on Harpers Ferry Rd. Damage was initially limited to downed trees and limbs as the tornado moved east northeast. The first structural damage occurred along Tater Hill Rd, where several outbuildings were heavily damaged and a man was injured when he was thrown from his back porch. The tornado continued east northeast from there, entering a heavily wooded area and crossing a finger of Russell Lake before emerging on Highway 81 just south of Tom Young Bridge Rd. Damage was limited to sporadic tree damage along this section of the path. The tornado remained weak as it continued east before intensifying after crossing Monterey Rd, as much of the roof was removed from a frame home on Fairfield Church Rd. The tornado weakened again from there, with damage limited primarily to uprooted hardwoods and snapped softwoods as it crossed Highway 71, 28, and 20, passing just north of the Abbeville city limits. The tornado intensified again after crossing Old Douglas Mill Rd, as multiple small to medium hardwoods were snapped 10 to 20 feet above the ground along portions of Stevenson Rd and Old Hodges Rd. The tornado weakened again east of this location, with additional EF1 tree damage observed before it moved into Greenwood County near Johns Creek Rd.

Hail in ABBEVILLE, SOUTH CAROLINA
From 03-MAY-21 13:40:00 to 03-MAY-21 13:40:00 (EST-5)
Location: CALHOUN FALLS
Magnitude: 1.50 
Reported by: COOP Observer

Co-op observer reported ping pong ball size hail near Calhoun Falls.

Tornado in GREENWOOD, SOUTH CAROLINA
From 03-MAY-21 13:49:00 to 03-MAY-21 13:54:00 (EST-5)
Location: HARRIS
Tornado F-scale: EF1
Property damage: 40.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS storm survey determined the path of an EF2 tornado that tracked almost the length of Abbeville County moved into Greenwood County with EF1 intensity at Johns Creek Rd. The tornado moved almost due east, crossing Deadfall Rd West, Calhoun Rd just west of Highway 25 before finally lifting near Highway 25 along the northern outskirts of the city of Greenwood. Damage was primarily limited to uprooted hardwoods and snapped softwoods in Greenwood County, although a couple of storage buildings received minor to moderate damage. The total path length of over 29 miles made this the longest tornado track in upstate South Carolina since 1994.

Hail in ABBEVILLE, SOUTH CAROLINA
From 03-MAY-21 13:53:00 to 03-MAY-21 13:53:00 (EST-5)
Location: ABBEVILLE
Magnitude: 1.75 
Reported by: Trained Spotter

Spotter reported golf ball size hail in the Abbeville area.

Hail in GREENWOOD, SOUTH CAROLINA
From 03-MAY-21 14:21:00 to 03-MAY-21 14:21:00 (EST-5)
Location: SOUTH GREENWOOD
Magnitude: 1.00 
Reported by: Trained Spotter

Spotter reported quarter size hail on Highway 221 on the south side of Greenwood.