680 FZNT26 KNHC 172047 OFFN05 NAVTEX Marine Forecast NWS National Hurricane Center Miami, FL 447 PM EDT Fri Sep 17 2021 ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed Coastal Waters Forecasts... .SYNOPSIS...A weak Atlantic ridge north of the area will maintain mainly moderate easterly trade winds across the regional waters through Sun. A tropical wave and associated low pressure will approach the northern Leeward Islands late Sun then begin to move more NW and pass across or just north of the local Atlantic waters Mon night through Tue night. move across the NE Caribbean late Sun through Mon, and across the local waters Tue. There is a high chance this low pressure will form into a tropical cyclone over the next several days. Regardless of further development, expect increasing winds, seas and thunderstorms north through east of the local islands early next week. San Juan Atlantic Waters .TONIGHT...E winds 15 kt. Seas 4 to 5 ft. Scattered showers and isolated tstms. .SAT...NE to E winds 10 to 15 kt. Seas 4 to 5 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 5 ft. .SUN NIGHT...NE to E winds 10 to 15 kt. Seas 4 to 5 ft. .MON...NE to E winds 15 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...NE to E winds 20 to 25 kt. Seas 6 to 8 ft. .TUE...E winds 20 to 25 kt. Seas 6 to 9 ft. .TUE NIGHT...E to SE winds 20 to 25 kt. Seas 6 to 9 ft. .WED...SE winds 15 to 20 kt. Seas 6 to 8 ft. .WED NIGHT...SE winds 10 to 15 kt. Seas 4 to 6 ft. San Juan Caribbean Waters .TONIGHT...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. Scattered showers and isolated tstms. .SAT...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. Scattered showers and isolated tstms. .SAT NIGHT...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...NE to E winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...NE to E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. .WED...SE winds 5 to 10 kt. Seas 3 ft. .WED NIGHT...E to SE winds 5 to 10 kt. Seas 3 ft.