Special Marine Warning issued May 4 at 12:43AM EDT until May 4 at 12:45AM EDT by NWS Miami FL
Details
The affected areas were...
Biscayne Bay...
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM...
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM
excluding the territorial waters of Bahamas...
The thunderstorms have weakened and no longer pose a significant
threat to boaters.