A deep upper trough of low pressure extended down the eastern United States into the northeast Gulf of Mexico, with a deep cyclonic gyre in the Bay of Campeche.  Numerous showers and thunderstorms developing over Cuba spread north and northeast, producing widespread gale-force wind gusts over the Florida Keys.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 16:30:00 to 16-JUN-21 16:30:00 (EST-5)
Location: SAND KEY LIGHT
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 36 knots was measured at the new Sand Key Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 16:36:00 to 16-JUN-21 16:36:00 (EST-5)
Location: SAND KEY LIGHT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 52 knots was measured at the new Sand Key Light.

Marine Thunderstorm Wind in GULF OF MEXICO FROM EAST CAPE SABLE TO CHOKOLOSKEE 20 TO 60 NM OUT AND BEYOND 5 FATHOMS, GULF OF MEXICO
From 16-JUN-21 16:56:00 to 16-JUN-21 16:56:00 (EST-5)
Location: SMITH SHOAL LIGHT
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 39 knot was measured at an automated WeatherFlow station at Smith Shoal Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 17:00:00 to 16-JUN-21 17:00:00 (EST-5)
Location: SAND KEY LIGHT
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 37 knots was measured at the new Sand Key Light.

Marine Thunderstorm Wind in GULF OF MEXICO FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO 5 FATHOMS, GULF OF MEXICO
From 16-JUN-21 17:00:00 to 16-JUN-21 17:00:00 (EST-5)
Location: KEY WEST
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 34 knots was measured at an automated WeatherFlow station at the U.S. Coast Guard Sector Key West.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 17:00:00 to 16-JUN-21 17:00:00 (EST-5)
Location: KEY WEST
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust of 38 knots was measured at Key West International Airport.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 17:01:00 to 16-JUN-21 17:01:00 (EST-5)
Location: KEY WEST
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A wind gust of 40 knots was measured at the NWS Florida Keys RSOIS.

Marine Thunderstorm Wind in GULF OF MEXICO FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO 5 FATHOMS, GULF OF MEXICO
From 16-JUN-21 17:02:00 to 16-JUN-21 17:02:00 (EST-5)
Location: KEY WEST
Magnitude: 49.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 49 knots was measured at an automated weather station at a residence near Eagle Avenue and 19th Street in Key West.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 16-JUN-21 17:55:00 to 16-JUN-21 17:55:00 (EST-5)
Location: MARATHON
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 36 knots was measured at an automated weather station on Wahoo Drive in Marathon.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 16-JUN-21 17:56:00 to 16-JUN-21 17:56:00 (EST-5)
Location: MARATHON
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust of 36 knots was measured at the Florida Keys Marathon International Airport.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 18:07:00 to 16-JUN-21 18:07:00 (EST-5)
Location: ALLIGATOR REEF LIGHT
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 38 knots was measured at an automated WeatherFlow station at Alligator Reef Light.

Marine Thunderstorm Wind in FLORIDA BAY INCLUDING BARNES SOUND, BLACKWATER SOUND, AND BUTTONWOOD SOUND, GULF OF MEXICO
From 16-JUN-21 18:10:00 to 16-JUN-21 18:10:00 (EST-5)
Location: PLANTATION KEY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 38 knots was measured by an automated weather station at a residence on Valencia Drive in Islamorada.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 16-JUN-21 19:02:00 to 16-JUN-21 19:02:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 50 knots was measured at an automated WeatherFlow station at Carysfort Reef Light.

Marine Thunderstorm Wind in BAYSIDE AND GULFSIDE FROM CRAIG KEY TO WEST END OF SEVEN MILE BRIDGE, GULF OF MEXICO
From 16-JUN-21 17:50:00 to 16-JUN-21 17:50:00 (EST-5)
Location: DUCK KEY
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 42 knots was measured at an automated weather station at a residence on Conch Key.