A frontal zone was north of the area with high pressure extending across south Florida. Aloft, a 500 mb trough base was across the area. Waves of PVA moved eastward through the base of the upper trough which enhanced diurnally driven convection along the sea breezes under westerly steering flow.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 12:57:00 to 15-JUN-23 12:57:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at Naval Station Mayport measured a gust of 43 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 12:50:00 to 15-JUN-23 12:50:00 (EST-5)
Location: JACKSONVILLE BEACH
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site at Jacksonville Beach measured a gust of 41 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 12:36:00 to 15-JUN-23 12:36:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The NOS station at Mayport measured wind gust of 41 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 13:18:00 to 15-JUN-23 13:18:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Mayport Naval Station AWOS measured gust of 44 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 13:38:00 to 15-JUN-23 13:38:00 (EST-5)
Location: ST AUGUSTINE ARPT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The mesonet station Lewis measured a gust of 40 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 14:00:00 to 15-JUN-23 14:00:00 (EST-5)
Location: SAUF1 CMAN
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The SAUF1 C-man station measured a wind gust of 43 mph.

Marine Thunderstorm Wind in ALTAMAHA SD TO FERNANDINA BEACH FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 11:29:00 to 15-JUN-23 11:29:00 (EST-5)
Location: MCKINNON ARPT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The McKinnon Airfield ASOS measured a wind gust of 46 mph.

Marine Thunderstorm Wind in ALTAMAHA SD TO FERNANDINA BEACH FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 11:15:00 to 15-JUN-23 11:15:00 (EST-5)
Location: BRUNSWICK
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Brunswick Golden Isles airport measured a wind gust of 46 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 12:35:00 to 15-JUN-23 12:35:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The mesonet station about 1 mile ENE of Fort Caroline measured a wind gust of 45 mph.

Marine Thunderstorm Wind in ST AUGUSTINE TO FLAGLER BEACH FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 14:30:00 to 15-JUN-23 14:30:00 (EST-5)
Location: BEVERLY BEACH
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet station in Marineland measured a wind gust of 48 mph.

Marine Thunderstorm Wind in ST AUGUSTINE TO FLAGLER BEACH FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 14:30:00 to 15-JUN-23 14:30:00 (EST-5)
Location: BEVERLY BEACH
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A WeatherStem mesonet station in Palm Coast measured a wind gust of 47 mph.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 12:30:00 to 15-JUN-23 12:30:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet station at the Terminal Channel measured a wind gust of 42 mph.

Marine Thunderstorm Wind in ST AUGUSTINE TO FLAGLER BEACH FL OUT 20NM, ATLANTIC SOUTH
From 15-JUN-23 14:24:00 to 15-JUN-23 14:24:00 (EST-5)
Location: CRESCENT BEACH
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site in Summerhouse measured a wind gust of 40 mph.