Scattered thunderstorms, including one supercell storm, developed during the evening in the vicinity of a stationary front draped across upstate South Carolina. The supercell storm produced a swath of large hail across Spartanburg County. A cluster of thunderstorms then moved into the upstate from northeast Georgia after midnight and produced locally damaging wind gusts.

Hail in GREENVILLE, SOUTH CAROLINA
From 04-MAY-20 18:00:00 to 04-MAY-20 18:00:00 (EST-5)
Location: LIMA
Magnitude: 0.88 
Reported by: Public

Public reported nickel size hail near Tigerville.

Hail in SPARTANBURG, SOUTH CAROLINA
From 04-MAY-20 18:44:00 to 04-MAY-20 19:11:00 (EST-5)
Location: EAST GREER
Magnitude: 1.75 
Reported by: NWS Employee

Numerous sources reported a swath of up to golf ball size hail from the east side of Greer, across the Duncan and Reidville areas, to Moore.

Hail in SPARTANBURG, SOUTH CAROLINA
From 04-MAY-20 19:46:00 to 04-MAY-20 19:46:00 (EST-5)
Location: CROSS ANCHOR
Magnitude: 1.75 
Reported by: Public

Public reported golf ball size hail near Cross Anchor.

Thunderstorm Wind in OCONEE, SOUTH CAROLINA
From 05-MAY-20 01:00:00 to 05-MAY-20 01:06:00 (EST-5)
Location: EARLS GROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

County comms reported trees and power lines blown down on South Arrowhead Dr and on Williams Farm Rd in Westminster and on Hickory Ln in Seneca.

Thunderstorm Wind in ANDERSON, SOUTH CAROLINA
From 05-MAY-20 01:14:00 to 05-MAY-20 01:14:00 (EST-5)
Location: PENDLETON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

County comms reported a few trees blown down in the Pendleton area.

Thunderstorm Wind in GREENVILLE, SOUTH CAROLINA
From 05-MAY-20 01:45:00 to 05-MAY-20 02:00:00 (EST-5)
Location: FORK SHOALS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported numerous trees blown down along Jenkins Bridge Rd in the Fountain Inn area, multiple trees blown down near Fairview Rd and Highway 14 in Simpsonville, two large trees down on Merrifield Drive and Gateway Street on the east side of Greenville, and large tree limbs down in the Greer area.

Thunderstorm Wind in ANDERSON, SOUTH CAROLINA
From 05-MAY-20 01:45:00 to 05-MAY-20 01:45:00 (EST-5)
Location: IVA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

County comms reported several trees blown down across the city of Iva.

Thunderstorm Wind in YORK, SOUTH CAROLINA
From 05-MAY-20 02:42:00 to 05-MAY-20 02:42:00 (EST-5)
Location: HICKORY GROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire department reported several trees blown down in areas south of Hickory Grove.

Thunderstorm Wind in CHESTER, SOUTH CAROLINA
From 05-MAY-20 02:53:00 to 05-MAY-20 03:21:00 (EST-5)
Location: LOWRYS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County comms reported multiple tree limbs blown down on power lines and at least a couple of trees down in the northern and eastern parts of Chester County.

Thunderstorm Wind in YORK, SOUTH CAROLINA
From 05-MAY-20 03:10:00 to 05-MAY-20 03:10:00 (EST-5)
Location: ROCK HILL BRYANT ARP
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County comms reported power lines blown down on Melrose Dr in Rock Hill and a tree down in Fort Mill.

Thunderstorm Wind in SPARTANBURG, SOUTH CAROLINA
From 04-MAY-20 18:59:00 to 04-MAY-20 18:59:00 (EST-5)
Location: REIDVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a few trees blown down in the Reidville area.