A severe quasi-linear convective system (QLCS) moved through coastal waters during afternoon and evening hours of April 5, 2022 as a mid-level shortwave ejected rapidly across the region in advance of a surface cold front. The environment ahead of the QLCS was favorable for severe local storms as southerly winds spread mid 60 dewpoint temperatures into a warm sector across the Southeast United States and favorable mid-level lapse rates and lifted index values helped produce mixed layer convective available potential energy (MLCAPE) as high as 1500-2000 J/kg during peak surface heating across coastal waters. Within the warm sector, strong shear associated with 50-70 knot low and mid-level jets beneath the left front quadrant of a 120 knot upper-level jet, 0-6 km bulk shear around 50 knots, and 0-3 km storm relative helicity in excess of 300 m2/s2 were supportive of well organized convection and potentially embedded supercell thunderstorms in a QLCS capable of producing a prolonged path of damaging winds and strong long-track waterspouts. As the QLCS swept through coastal waters, numerous thunderstorms were exceptionally strong with severe winds recorded/measured near or just ahead of the main line of thunderstorms.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 19:02:00 to 05-APR-22 19:12:00 (EST-5)
Location: ISLE OF PALMS
Magnitude: 51.00 MG
Reported by: Mesonet

The Weatherflow sensor at Isle of Palms Pier measured a peak wind gust of 51 knots at 707 PM.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 19:08:00 to 05-APR-22 19:08:00 (EST-5)
Location: ISLE OF PALMS
Magnitude: 40.00 MG
Reported by: Buoy

The Capers Nearshore Bouy measured a wind gust of 40 knots.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 19:08:00 to 05-APR-22 19:08:00 (EST-5)
Location: FOLLY BEACH C-MAN (FBIS1)
Magnitude: 34.00 MG
Reported by: Buoy

The Charleston Buoy measured a wind gust of 34 knots.

Marine Thunderstorm Wind in SOUTH SANTEE RIVER TO EDISTO BEACH SC FROM 20 TO 40 NM, ATLANTIC SOUTH
From 05-APR-22 20:10:00 to 05-APR-22 20:20:00 (EST-5)
Location: EDISTO BUOY (41004)
Magnitude: 54.00 MG
Reported by: Buoy

Buoy 41004 measured a peak wind gust of 54 knots at 810 PM.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 20:46:00 to 05-APR-22 20:46:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 36.00 MG
Reported by: Mesonet

The Weatherflow sensor at Savannah Entrance Light measured a wind gust of 36 knots.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 20:56:00 to 05-APR-22 21:01:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 39.00 MG
Reported by: Mesonet

The Weatherflow sensor at Savannah Entrance Light measured a peak wind gust of 39 knots at 856 PM.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 21:41:00 to 05-APR-22 21:41:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 36.00 MG
Reported by: Mesonet

The Weatherflow sensor at Savannah Entrance Light measured a wind gust of 36 knots.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:45:00 to 05-APR-22 18:50:00 (EST-5)
Location: FOLLY BEACH
Magnitude: 41.00 MG
Reported by: Mesonet

The Weatherflow sensor at Folly Beach South End measured a peak wind gust of 41 knots at 645 PM.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:30:00 to 05-APR-22 18:30:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 38.00 MG
Reported by: Official NWS Observations

The Fort Pulaski tide gage measured a wind gust of 38 knots.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:29:00 to 05-APR-22 18:29:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 36.00 MG
Reported by: Mesonet

The Weatherflow sensor at Calibougue Sound measured a 36 knot wind gust.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 05-APR-22 18:40:00 to 05-APR-22 18:40:00 (EST-5)
Location: FORT SUMTER
Magnitude: 38.00 MG
Reported by: Mesonet

The Weatherflow sensor at Fort Sumter Range Front Light measured a 38 knot wind gust.

Marine Thunderstorm Wind in SAVANNAH GA TO ALTAMAHA SD GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:41:00 to 05-APR-22 18:41:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 42.00 MG
Reported by: Mesonet

The Weatheflow site at South Tybee Island measured a wind gust of 42 knots.

Marine Thunderstorm Wind in EDISTO BEACH SC TO SAVANNAH GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:41:00 to 05-APR-22 18:41:00 (EST-5)
Location: TYBEE ISLAND
Magnitude: 40.00 MG
Reported by: Mesonet

The Weatherflow sensor at Savannah Entrance Light measured a wind gust of 40 knots.

Marine Thunderstorm Wind in SAVANNAH GA TO ALTAMAHA SD GA OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 18:45:00 to 05-APR-22 19:00:00 (EST-5)
Location: ALTAMAHA SOUND
Magnitude: 35.00 MG
Reported by: Official NWS Observations

The Sapelo Island NERRS measured a peak wind gust of 35 knots at 7 PM.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 05-APR-22 18:44:00 to 05-APR-22 19:09:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 58.00 MG
Reported by: Mesonet

The Weatherflow sensor at Shutes Folly measured a peak wind gust of 58 knots at 659 PM.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 05-APR-22 18:55:00 to 05-APR-22 19:00:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 37.00 MG
Reported by: Mesonet

The Weatheflow sensor at Charleston measured a peak wind gust of 37 knots.

Marine Thunderstorm Wind in S SANTEE R TO EDISTO BEACH SC OUT 20NM, ATLANTIC SOUTH
From 05-APR-22 19:00:00 to 05-APR-22 19:05:00 (EST-5)
Location: FOLLY BEACH
Magnitude: 41.00 MG
Reported by: Mesonet

The Weatherflow sensor at Folly Beach South End measured a peak wind gust of 41 knots at 7 PM.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 05-APR-22 19:00:00 to 05-APR-22 19:00:00 (EST-5)
Location: THE CHARLESTON BATTERY
Magnitude: 40.00 MG
Reported by: Official NWS Observations

The WCXM sensor in downtown Charleston measured a wind gust of 40 knots.

Marine Thunderstorm Wind in CHARLESTON HARBOR, ATLANTIC SOUTH
From 05-APR-22 18:55:00 to 05-APR-22 19:10:00 (EST-5)
Location: FORT SUMTER
Magnitude: 53.00 MG
Reported by: Mesonet

The Weatherflow sensor at Fort Sumter Range Front Light measured a peak wind gust of 53 knots at 705 PM.