A warm front lifted across the local area as a unusually strong area of low pressure tracked across the SE region. A pre-frontal line of storms moved across the area in the afternoon. A strong low level jet caused strong wind gusts, even from showers. Saturated grounds caused localized flooding from additional heavy rainfall.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:06:00 to 20-DEC-18 11:06:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 48.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow sensor at Huguenot Park measured a wind gust to 55 mph in showers.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:18:00 to 20-DEC-18 11:18:00 (EST-5)
Location: FERNANDINA NOS
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The NOS station in Fernandina Beach measured a wind gust to 40 mph in showers.

Marine Thunderstorm Wind in ALTAMAHA SD TO FERNANDINA BEACH FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:37:00 to 20-DEC-18 11:37:00 (EST-5)
Location: CUMBERLAND STAFFORD
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The WeatherFlow sensor at Jekyll Island measured a wind gust to 42 mph in showers.

Marine Thunderstorm Wind in ALTAMAHA SD TO FERNANDINA BEACH FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:55:00 to 20-DEC-18 11:55:00 (EST-5)
Location: BRUNSWICK
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Brunswick Golden Isles airport measured a gust of 43 mph.

Marine Thunderstorm Wind in ALTAMAHA SD TO FERNANDINA BEACH FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:56:00 to 20-DEC-18 11:56:00 (EST-5)
Location: MCKINNON ARPT
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Malcom McKinnon Airport ASOS measured a wind gust to 45 mph.

Marine Thunderstorm Wind in ST AUGUSTINE TO FLAGLER BEACH FL 20 TO 60NM, ATLANTIC SOUTH
From 20-DEC-18 10:16:00 to 20-DEC-18 10:16:00 (EST-5)
Location: CRESCENT BEACH
Magnitude: 36.00 MG
Reported by: Public

A citizens weather observing station at Marineland measured a peak wind gust of 41 mph in showers moving offshore.

Marine Thunderstorm Wind in ST AUGUSTINE TO FLAGLER BEACH FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:29:00 to 20-DEC-18 10:29:00 (EST-5)
Location: SAUF1 CMAN
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatheflow sensor at Lewis measured a wind gust of 41 mph in showers.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:29:00 to 20-DEC-18 10:29:00 (EST-5)
Location: CRESCENT BEACH
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 52 mph was measured in showers that moved across the sensor.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:38:00 to 20-DEC-18 10:38:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow sensor at Terminal Channel measured a wind gust of 45 mph in showers that moved across the site.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:45:00 to 20-DEC-18 10:45:00 (EST-5)
Location: JACKSONVILLE BEACH
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow sensor at the Jacksonville Beach Pier measured a wind gust of 47 mph in showers that moved across the site.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:50:00 to 20-DEC-18 10:50:00 (EST-5)
Location: JACKSONVILLE BEACH
Magnitude: 47.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow site at the Jacksonville Beach Pier measured a wind gust of 54 mph in showers.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:54:00 to 20-DEC-18 10:54:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Craig ASOS measured a wind gust of 46 mph in showers.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 10:56:00 to 20-DEC-18 10:56:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the Naval Air Station Jacksonville measured a wind gust to 53 mph in showers.

Marine Thunderstorm Wind in FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20NM, ATLANTIC SOUTH
From 20-DEC-18 11:00:00 to 20-DEC-18 11:00:00 (EST-5)
Location: MAYPORT NAS
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Weatherflow sensor at Buck Island measured a wind gust of 49 mph in showers.