A stalled frontal boundary across the area was the focus for strong to severe thunderstorms. They also produced locally heavy rainfall and flash flooding.

Thunderstorm Wind in ORANGEBURG, SOUTH CAROLINA
From 01-MAY-16 14:10:00 to 01-MAY-16 14:10:00 (EST-5)
Location: PROVIDENCE
Magnitude: 60.00 EG
Reported by: Law Enforcement

Reported trees down near I-95 and US Route 176.

Flash Flood in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 17:08:00 to 01-MAY-16 17:15:00 (EST-5)
Location: COLUMBIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

USC Police reported flooding at 1400 Wheat Street. Roadway was impassable.

Flash Flood in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 17:08:00 to 01-MAY-16 17:15:00 (EST-5)
Location: COLUMBIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

USC Police reported flooding at 300 Sumter St. The roadway was impassable.

Hail in FAIRFIELD, SOUTH CAROLINA
From 01-MAY-16 17:26:00 to 01-MAY-16 17:26:00 (EST-5)
Location: LEBANON
Magnitude: 1.00 
Reported by: Public

Public reported quarter size hail at the Lebanon Mart along Highway 34.

Hail in FAIRFIELD, SOUTH CAROLINA
From 01-MAY-16 17:55:00 to 01-MAY-16 17:55:00 (EST-5)
Location: WINNSBORO
Magnitude: 0.75 
Reported by: Law Enforcement

Winnsboro Police Department reported penny size hail.

Hail in FAIRFIELD, SOUTH CAROLINA
From 01-MAY-16 18:03:00 to 01-MAY-16 18:03:00 (EST-5)
Location: ROCKTON
Magnitude: 1.00 
Reported by: Public

Convenience store employee reported quarter size hail.

Flash Flood in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 16:55:00 to 01-MAY-16 17:35:00 (EST-5)
Location: SEIVERN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

USGS Stream Gage along Rocky Branch Creek at Whaley and Main Streets crested at 9.01 feet. Flood Stage is 7.2 feet.

Heavy Rain in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 17:05:00 to 01-MAY-16 17:05:00 (EST-5)
Location: OLYMPIA MILLS
Reported by: Official NWS Observations

The NWS rain gage reported 1.27 inches of rain fell in 35 minutes at the University of South Carolina. The total for the day was 1.66 inches at that time.

Heavy Rain in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 17:05:00 to 01-MAY-16 17:05:00 (EST-5)
Location: COLUMBIA
Reported by: Mesonet

RCWinds Mesonet at MLK Park recorded 1.81 inches of rainfall in about 90 minutes. Total for the day at this time was 2.28 inches.

Heavy Rain in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 18:10:00 to 01-MAY-16 18:10:00 (EST-5)
Location: COLUMBIA
Reported by: County Official

Richland County Emergency Services employee reported 2.55 inches of rainfall in the University Hill areas of Columbia.

Hail in FAIRFIELD, SOUTH CAROLINA
From 01-MAY-16 17:45:00 to 01-MAY-16 17:45:00 (EST-5)
Location: WINNSBORO
Magnitude: 1.00 
Reported by: Broadcast Media

WLTX TV reported quarter size hail at Evans Street and Main Street in Winnsboro.

Flash Flood in RICHLAND, SOUTH CAROLINA
From 01-MAY-16 17:08:00 to 01-MAY-16 17:15:00 (EST-5)
Location: OLYMPIA MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

USC Police reported flooding at the intersection of Main Street and Whaley Street. The roadway was impassable as Rocky Branch Creek Flooded.