A squall line developed over the Ohio Valley during the afternoon hours. The thunderstorm complex rapidly moved to the southeast, crossing the Appalachian Mountains and affecting much of western North Carolina and the northwest piedmont of South Carolina during the late evening hours.

Hail in MECKLENBURG, NORTH CAROLINA
From 10-MAY-11 23:18:00 to 10-MAY-11 23:18:00 (EST-5)
Location: HUNTERSVILLE
Magnitude: 1.00 
Reported by: Fire Department/Rescue

Hail in CLEVELAND, NORTH CAROLINA
From 10-MAY-11 23:20:00 to 10-MAY-11 23:20:00 (EST-5)
Location: SHELBY
Magnitude: 0.88 
Reported by: Public

Thunderstorm Wind in GASTON, NORTH CAROLINA
From 10-MAY-11 23:27:00 to 10-MAY-11 23:34:00 (EST-5)
Location: BESSEMER CITY
Magnitude: 55.00 EG
Reported by: Newspaper

Multiple trees were blown down from Bessemer City to the city of Gastonia. One tree fell on and destroyed a mobile home on Capps Rd, about 5 miles west of Gastonia. Another tree fell on and destroyed a vehicle on Taylor Dr, 2.5 miles southwest of town. Additional trees and large limbs blown down in the Crowders Mountain area.

Hail in MECKLENBURG, NORTH CAROLINA
From 10-MAY-11 23:33:00 to 10-MAY-11 23:33:00 (EST-5)
Location: COLLEGE DOWNS
Magnitude: 2.00 
Reported by: Public

Numerous reports of hail up to 2 inches in diamater in the UNC Charlotte area.

Hail in GASTON, NORTH CAROLINA
From 10-MAY-11 23:35:00 to 10-MAY-11 23:35:00 (EST-5)
Location: CROWDERS
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MECKLENBURG, NORTH CAROLINA
From 11-MAY-11 23:45:00 to 11-MAY-11 23:45:00 (EST-5)
Location: HICKORY GROVE
Magnitude: 0.75 
Reported by: Public

Thunderstorm Wind in UNION, NORTH CAROLINA
From 11-MAY-11 00:15:00 to 11-MAY-11 00:15:00 (EST-5)
Location: WAXHAW ARPT
Magnitude: 55.00 EG
Reported by: Public

Numerous trees were blown down to the south of Waxhaw, toward the state line.

Thunderstorm Wind in UNION, NORTH CAROLINA
From 11-MAY-11 00:32:00 to 11-MAY-11 00:32:00 (EST-5)
Location: ALTON
Magnitude: 55.00 EG
Reported by: County Official

Multiple trees were blown down along highway 207, near the state line.

Thunderstorm Wind in AVERY, NORTH CAROLINA
From 10-MAY-11 21:53:00 to 10-MAY-11 22:11:00 (EST-5)
Location: ELK PARK
Magnitude: 55.00 EG
Reported by: County Official

Numerous trees were blown across the county, mainly from the Elk Park area to the southern part of the county.

Hail in IREDELL, NORTH CAROLINA
From 10-MAY-11 21:58:00 to 10-MAY-11 21:58:00 (EST-5)
Location: LORAY
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in ALEXANDER, NORTH CAROLINA
From 10-MAY-11 22:25:00 to 10-MAY-11 22:25:00 (EST-5)
Location: TAYLORSVILLE
Magnitude: 0.75 
Reported by: County Official

Thunderstorm Wind in MCDOWELL, NORTH CAROLINA
From 10-MAY-11 22:26:00 to 10-MAY-11 22:40:00 (EST-5)
Location: MARION ARPT
Magnitude: 55.00 EG
Reported by: Trained Spotter

Multiple trees were blown down across the county. One tree fell on and caused extensive damage to a home on Holly St in the city of Marion. Another tree destroyed an outbuilding on Vein Mountain.

Thunderstorm Wind in CALDWELL, NORTH CAROLINA
From 10-MAY-11 22:28:00 to 10-MAY-11 22:34:00 (EST-5)
Location: ABINGDON
Magnitude: 55.00 EG
Reported by: Amateur Radio

Multiple trees were blown down along Abington Rd near Angel Lane. One tree fell on and damaged a house in this area. Several other homes were damaged by falling trees in the Lenoir and Collettsville areas.

Hail in MECKLENBURG, NORTH CAROLINA
From 10-MAY-11 22:30:00 to 10-MAY-11 22:30:00 (EST-5)
Location: DERITA
Magnitude: 0.75 
Reported by: Public

Thunderstorm Wind in MADISON, NORTH CAROLINA
From 10-MAY-11 22:45:00 to 10-MAY-11 22:45:00 (EST-5)
Location: FAUST
Magnitude: 50.00 EG
Reported by: County Official

Two trees were blown down on Puncheon Fork Rd, about 5 miles north of Mars Hill.

Thunderstorm Wind in RUTHERFORD, NORTH CAROLINA
From 10-MAY-11 22:42:00 to 10-MAY-11 23:02:00 (EST-5)
Location: WHITEHOUSE
Magnitude: 60.00 EG
Reported by: Trained Spotter

Numerous trees were blown down across the county, some of which fell on homes and vehicles. A large tree fell on a mobile home on Spurlin Rd in Ellenboro, killing two 18-year-old twin sisters.

Thunderstorm Wind in BURKE, NORTH CAROLINA
From 10-MAY-11 22:45:00 to 10-MAY-11 22:47:00 (EST-5)
Location: VALDESE
Magnitude: 55.00 EG
Reported by: Broadcast Media

Numerous trees were blown down in the downtown area of Valdese, with additional trees blown down near Connelly Springs.

Thunderstorm Wind in CALDWELL, NORTH CAROLINA
From 10-MAY-11 22:51:00 to 10-MAY-11 22:51:00 (EST-5)
Location: RHODHISS
Magnitude: 50.00 EG
Reported by: Broadcast Media

Several mainly small trees were blown down near the intersection of Sugar Loaf Rd and highway 18.

Hail in IREDELL, NORTH CAROLINA
From 10-MAY-11 22:52:00 to 10-MAY-11 22:52:00 (EST-5)
Location: MT MOURNE
Magnitude: 1.75 
Reported by: Fire Department/Rescue

Hail up to golf ball size was reported on the south side of Mooresville.

Thunderstorm Wind in RUTHERFORD, NORTH CAROLINA
From 10-MAY-11 22:56:00 to 10-MAY-11 23:07:00 (EST-5)
Location: FOREST CITY
Magnitude: 70.00 EG
Reported by: County Official

Numerous trees were blown down in the southern part of the county. Some trees fell on homes and vehicles. In addition, a part of a high tension line tower was blown down off Rabbit Moffit Rd, near the South Carolina line.

Thunderstorm Wind in CLEVELAND, NORTH CAROLINA
From 10-MAY-11 23:14:00 to 10-MAY-11 23:14:00 (EST-5)
Location: BOILING SPGS
Magnitude: 55.00 EG
Reported by: Amateur Radio

Several trees were blown down in and around Boiling Springs, including on College Farm Rd.

Thunderstorm Wind in CLEVELAND, NORTH CAROLINA
From 10-MAY-11 23:14:00 to 10-MAY-11 23:25:00 (EST-5)
Location: SHELBY
Magnitude: 60.00 EG
Reported by: Newspaper

Multiple trees were blown down across the southern part of the county. The damage was a little more concentrated from Shelby to Kings Mountain. At least one tree fell on a home in Shelby. In addition, a church had part of its roof removed on Hudson St in Shelby. Additional damage was reported in Grover, where a tree fell on a rec vehicle.