A trough of low pressure moving southward around the southeast periphery of strong high pressure along the Carolina coastline focused strong thunderstorm development across southwest Florida.  The thunderstorms propagated southward divergently along outflow boundaries, producing scattered gale-force wind gusts throughout the Florida Keys coastal waters.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 23-MAR-17 18:09:00 to 23-MAR-17 18:09:00 (EST-5)
Location: SUMMERLAND KEY
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 automated Citizen Weather Observing Program station at the Florida Keys Aqueduct Authority Pump Station on Ramrod Key.

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 23-MAR-17 18:15:00 to 23-MAR-17 18:15:00 (EST-5)
Location: SMITH SHOAL 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 Smith Shoal Light.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 23-MAR-17 18:15:00 to 23-MAR-17 18:15:00 (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 GULF OF MEXICO FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO 5 FATHOMS, GULF OF MEXICO
From 23-MAR-17 18:15:00 to 23-MAR-17 18:15:00 (EST-5)
Location: BIG PINE KEY
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 41 knots was measured by an automated Weather Underground station along Bogie Channel on Big Pine Key.

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 23-MAR-17 18:19:00 to 23-MAR-17 18:19:00 (EST-5)
Location: BIG COPPITT KEY
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 35 knots was measured by an automated Davis Weatherlink station on Shark Key.

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 23-MAR-17 18:30:00 to 23-MAR-17 18:30:00 (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 23-MAR-17 18:23:00 to 23-MAR-17 18:23:00 (EST-5)
Location: SUMMERLAND KEY
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 Citizen Weather Observing Program station along the south shore of Cudjoe Bay.

Marine Thunderstorm Wind in HAWK CHANNEL FROM WEST END OF SEVEN MILE BRIDGE TO HALFMOON SHOAL OUT TO THE REEF, GULF OF MEXICO
From 23-MAR-17 18:50:00 to 23-MAR-17 18:50:00 (EST-5)
Location: SAND KEY LIGHT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

A wind gust of 35 knots was measured at the new Sand Key Light navigation tower, located just southeast of the Sand Key Lighthouse.

Marine Thunderstorm Wind in HAWK CHANNEL FROM OCEAN REEF TO CRAIG KEY OUT TO THE REEF, GULF OF MEXICO
From 24-MAR-17 00:00:00 to 24-MAR-17 00:00:00 (EST-5)
Location: CARYSFORT REEF LIGHT
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A wind gust of 35 knots was measured at an automated WeatherFlow station at Carysfort Reef Light.