Scattered to numerous strong to severe, discrete thunderstorm cells developed across the Piedmont during the afternoon ahead of a slow-moving, nearly stationary backdoor cold front. The storms were prolific hail producers, with some producing larger than baseball size hail. New cells often developed upstream of mature cells, then moved over the same areas, such that some locations saw two or more rounds of large hail. This was especially true across portions of Spartanburg, Cherokee, Union, and York Counties.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 16:20:00 to 23-MAY-14 16:20:00 (EST-5)
Location: LYMAN
Magnitude: 1.00 
Reported by: Amateur Radio

Ham radio operator reported dime to quarter size hail at the intersection of Highway 80 and Wade Hampton Blvd.

Hail in YORK, SOUTH CAROLINA
From 23-MAY-14 17:15:00 to 23-MAY-14 17:15:00 (EST-5)
Location: FT MILL
Magnitude: 2.00 
Reported by: SHAVE Project

National Severe Storms Lab relayed public report of 2-inch diameter hail near Fort Mill.

Hail in YORK, SOUTH CAROLINA
From 23-MAY-14 17:48:00 to 23-MAY-14 17:48:00 (EST-5)
Location: ROCK HILL
Magnitude: 1.75 
Reported by: Trained Spotter

Spotter reported golf ball size hail with a third York County severe thunderstorm. This one tracked across the southern part of the county.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 16:57:00 to 23-MAY-14 16:57:00 (EST-5)
Location: SPARTANBURG
Magnitude: 1.00 
Reported by: 911 Call Center

County comms reported hail of at least quarter size at Croft State Park.

Hail in PICKENS, SOUTH CAROLINA
From 23-MAY-14 13:43:00 to 23-MAY-14 13:48:00 (EST-5)
Location: EASLEY
Magnitude: 1.25 
Reported by: Trained Spotter

National Severe Storms Lab relayed public report of half dollar size hail 3 WNW. Spotters and the public reported up to half dollar size hail across the city of Easley.

Hail in PICKENS, SOUTH CAROLINA
From 23-MAY-14 13:46:00 to 23-MAY-14 13:46:00 (EST-5)
Location: LIBERTY
Magnitude: 1.75 
Reported by: Public

Public reported up to golf ball size hail off Country Club Rd.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 14:43:00 to 23-MAY-14 14:43:00 (EST-5)
Location: MOORE
Magnitude: 2.50 
Reported by: Public

Public provided photo evidence of tennis ball size hail in the Moore area.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 14:40:00 to 23-MAY-14 14:40:00 (EST-5)
Location: REIDVILLE
Magnitude: 2.25 
Reported by: SHAVE Project

National Severe Storms Lab relayed public report of 2.25 inch diameter hail near Reidville.

Hail in UNION, SOUTH CAROLINA
From 23-MAY-14 15:02:00 to 23-MAY-14 15:02:00 (EST-5)
Location: JONESVILLE
Magnitude: 1.00 
Reported by: Fire Department/Rescue

FD reported pea to quarter size hail west of Jonesville.

Hail in CHESTER, SOUTH CAROLINA
From 23-MAY-14 15:54:00 to 23-MAY-14 15:54:00 (EST-5)
Location: CHESTER
Magnitude: 1.75 
Reported by: Public

Public reported up to golf ball size hail north of the Leeds community.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 15:37:00 to 23-MAY-14 15:47:00 (EST-5)
Location: SPARTANBURG
Magnitude: 1.75 
Property damage: 3.00M
Reported by: Public

Public reported up to golf ball size hail from the west side of Spartanburg to the area around Spartanburg Regional Hospital.

Hail in YORK, SOUTH CAROLINA
From 23-MAY-14 16:56:00 to 23-MAY-14 17:25:00 (EST-5)
Location: YORK
Magnitude: 1.75 
Property damage: 1.00M
Reported by: SHAVE Project

National Severe Storms Lab relayed multiple public reports, corroborated by spotters and law enforcement, of up to golf ball size hail with a second severe thunderstorm that tracked from the city of York, across the north side of Rock Hill to near Tega Kay and Ft Mill.

Hail in UNION, SOUTH CAROLINA
From 23-MAY-14 17:50:00 to 23-MAY-14 17:50:00 (EST-5)
Location: UNION
Magnitude: 1.75 
Property damage: 250.00K
Reported by: Trained Spotter

Spotters reported up to golf ball size hail that broke car windshields in the Union area.

Hail in SPARTANBURG, SOUTH CAROLINA
From 23-MAY-14 14:39:00 to 23-MAY-14 14:50:00 (EST-5)
Location: DUNCAN
Magnitude: 1.75 
Property damage: 1.00M
Reported by: Trained Spotter

Spotters and the public reported up to golf ball size hail in the Duncan/Reidville/ Moore area.

Hail in UNION, SOUTH CAROLINA
From 23-MAY-14 17:59:00 to 23-MAY-14 17:59:00 (EST-5)
Location: UNION
Magnitude: 3.00 
Property damage: 250.00K
Reported by: 911 Call Center

County comms reported that the second severe thunderstorm produced larger than baseball size hail on the west side of the city. Multiple car windshields were reportedly broken out and skylights were broken at a department store.

Hail in YORK, SOUTH CAROLINA
From 23-MAY-14 16:57:00 to 23-MAY-14 17:10:00 (EST-5)
Location: ROCK HILL
Magnitude: 1.75 
Property damage: 3.00M
Reported by: SHAVE Project

National Severe Storms Lab relayed multiple public reports of up to golf ball size hail on the north side of Rock Hill.

Hail in YORK, SOUTH CAROLINA
From 23-MAY-14 16:52:00 to 23-MAY-14 16:52:00 (EST-5)
Location: YORK
Magnitude: 0.88 
Reported by: Trained Spotter

Spotter reported nickel size hail.