Strong thunderstorms developed inland across Berkeley and Charleston counties in the evening hours. These thunderstorms eventually progressed to the coast, producing strong wind gusts along the coast and in Charleston Harbor.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 09-MAY-23 19:06:00 to 09-MAY-23 19:10:00 (EST-5)
Location: ISLE OF PALMS
Magnitude: 36.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site located at the Isle of Palms pier measured a 36 knot wind gust.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 19:08:00 to 09-MAY-23 19:30:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 55.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at Shutes Folly in Charleston Harbor measured a peak wind gust of 55 knots at 7:13 pm EST.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 19:08:00 to 09-MAY-23 19:30:00 (EST-5)
Location: FORT SUMTER
Magnitude: 54.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at Fort Sumter in Charleston Harbor measured a peak wind gust of 54 knots at 7:13 pm EST.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 19:13:00 to 09-MAY-23 19:20:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 38.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site located near Charleston measured a peak wind gust of 38 knots at 7:18 pm EST.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 09-MAY-23 19:19:00 to 09-MAY-23 19:31:00 (EST-5)
Location: FOLLY BEACH
Magnitude: 47.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site located at Folly Beach County Park measured a peak wind gust of 47 knots at 7:24 pm EST.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 20:18:00 to 09-MAY-23 20:21:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 35.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at Shutes Folly in Charleston Harbor measured a 35 knot wind gust.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 20:18:00 to 09-MAY-23 20:25:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 47.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site located near Charleston measured a peak wind gust of 47 knots at 8:23 pm EST.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 22:33:00 to 09-MAY-23 22:45:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 47.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at Shutes Folly in Charleston Harbor measured a peak wind gust of 47 knots at 10:38 pm EST.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 09-MAY-23 22:33:00 to 09-MAY-23 22:50:00 (EST-5)
Location: FORT SUMTER
Magnitude: 48.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at Fort Sumter in Charleston Harbor measured a peak wind gust of 48 knots at 10:43 pm EST.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 09-MAY-23 22:39:00 to 09-MAY-23 22:46:00 (EST-5)
Location: FOLLY BEACH
Magnitude: 36.00 MG
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site located at Folly Beach County Park measured a peak wind gust of 36 knots at 10:44 pm EST.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 09-MAY-23 22:41:00 to 09-MAY-23 22:44:00 (EST-5)
Location: FOLLY BEACH C-MAN (FBIS1)
Magnitude: 34.00 MG
Crop damage: 0.00K
Reported by: C-MAN Station

The National Data Buoy Center site located on the north end of Folly Island measured a 34 knot wind gust.