A large mesoscale convective system propagating southward from the central Florida peninsula initiated a large outflow boundary that pushed southward throughout the Florida Keys.  Widespread gale-force wind gusts, especially across the coastal waters of the upper and middle Florida Keys, resulted.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 17:28:00 to 11-APR-21 17:28:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 38 knots from the northwest was recorded by a home weather station in the Angelfish Key section of Ocean Reef.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 17:27:00 to 11-APR-21 17:27:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 47.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 47 knots from the north was recorded by an automated WeatherFlow station at Carysfort Reef Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 17:52:00 to 11-APR-21 17:52:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 55 knots from the north was recorded at an automated WeatherFlow station at Carysfort Reef Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 17:58:00 to 11-APR-21 17:58:00 (EST-5)
Location: KEY LARGO
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 39 knots from the north-northwest was recorded at a WeatherFlow mesonet station at a Florida Keys Electrical Coop substation in North Key Largo.

Marine Thunderstorm Wind in FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND BUTTONWOOD SOUND, GULF OF MEXICO
From 11-APR-21 18:08:00 to 11-APR-21 18:08:00 (EST-5)
Location: PLANTATION KEY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 37 knots from the north-northeast was recorded at a WeatherFlow mesonet station at the Florida Keys Electric Cooperative Tavernier Substation.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:10:00 to 11-APR-21 18:10:00 (EST-5)
Location: LAYTON
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 41 knots was recorded at Long Key Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:11:00 to 11-APR-21 18:11:00 (EST-5)
Location: ALLIGATOR REEF LIGHT
Magnitude: 48.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 48 knots from the north was recorded by a WeatherFlow mesonet station at Alligator Reef Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:18:00 to 11-APR-21 18:18:00 (EST-5)
Location: ALLIGATOR REEF LIGHT
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 34 knots from the north was recorded at a WeatherFlow mesonet station at the Florida Keys Electric Cooperative Islamorada substation.

Marine Thunderstorm Wind in FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND BUTTONWOOD SOUND, GULF OF MEXICO
From 11-APR-21 17:35:00 to 11-APR-21 17:35:00 (EST-5)
Location: KEY LARGO
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 45 knots from the north-northeast was recorded at a home weather station in the Stellrecht Point subdivision of Key Largo.

Marine Thunderstorm Wind in FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND BUTTONWOOD SOUND, GULF OF MEXICO
From 11-APR-21 17:50:00 to 11-APR-21 17:50:00 (EST-5)
Location: KEY LARGO
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 35 knots from the north was measured at a home weather station in the Stellrecht Point subdivision of Key Largo.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:17:00 to 11-APR-21 18:17:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 45 knots was measured at an Weatherflow mesonet station at Carysfort Reef Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:25:00 to 11-APR-21 18:25:00 (EST-5)
Location: MARATHON
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 34 knots from the north-northeast was recorded at a home weather station in Key Colony Beach.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:25:00 to 11-APR-21 18:25:00 (EST-5)
Location: DUCK KEY
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 34 knots from the north-northeast was recorded at a WeatherFlow mesonet station at the Florida Keys Electric Cooperative Crawl Key substation.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:35:00 to 11-APR-21 18:35:00 (EST-5)
Location: MARATHON
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 43 knots from the northeast was recorded at a home weather station in Marathon.

Marine Thunderstorm Wind in HAWK CHANNEL FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:35:00 to 11-APR-21 18:35:00 (EST-5)
Location: DUCK KEY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 38 knots from the north-northeast was recorded at a WeatherFlow mesonet station on Crawl Key.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:50:00 to 11-APR-21 18:50:00 (EST-5)
Location: LAYTON
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 44 knots from the northeast was recorded at a home weather station in Marathon.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 17:40:00 to 11-APR-21 17:40:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 41 knots from the north-northwest was observed at a home weather station in the Angelfish Key section of Ocean Reef.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:00:00 to 11-APR-21 18:00:00 (EST-5)
Location: PLANTATION KEY
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 34 knots from the north was recorded at a home weather station on Plantation Key.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:31:00 to 11-APR-21 18:31:00 (EST-5)
Location: ALLIGATOR REEF LIGHT
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 41 knots from the north was recorded at a WeatherFlow mesonet station at Alligator Reef Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:35:00 to 11-APR-21 18:35:00 (EST-5)
Location: MARATHON
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 41 knots from the northeast was recorded at a home weather station in the Sombrero Beach area of Marathon.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:40:00 to 11-APR-21 18:40:00 (EST-5)
Location: LAYTON
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 45 knots was recorded at Long Key Light.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:54:00 to 11-APR-21 18:54:00 (EST-5)
Location: MARATHON
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A wind gust of 34 knots from the northeast was recorded at the NOAA National Ocean Service tide gauge at Vaca Key.

Marine Thunderstorm Wind in HAWK CHANNEL FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 18:55:00 to 11-APR-21 18:55:00 (EST-5)
Location: DUCK KEY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 38 knots from the north-northeast was recorded at a WeatherFlow mesonet station on Crawl Key.

Marine Thunderstorm Wind in HAWK CHANNEL FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE OUT TO THE REEF, GULF OF MEXICO
From 11-APR-21 19:00:00 to 11-APR-21 19:00:00 (EST-5)
Location: SOMBRERO KEY LIGHT
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 40 knots from the north-northeast was recorded at Sombrero Key Light.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 11-APR-21 18:41:00 to 11-APR-21 18:41:00 (EST-5)
Location: MARATHON
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust of 41 knots was recorded at the Florida Keys Marathon International Airport.