FZUS52 KJAX 281251 CWFJAX Coastal Waters Forecast for Northeast Florida/Southeast Georgia National Weather Service Jacksonville FL 851 AM EDT Wed Jul 28 2021 Atlantic Coastal Waters from Altamaha Sound GA to Flagler Beach FL out to 60 nm. Seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 1/10 of the waves. AMZ400-282115- Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm- 851 AM EDT Wed Jul 28 2021 .SYNOPSIS... Weak low pressure will drift north over South Carolina coast today. A trough extending from this low pressure area will press further into the region today and tonight. Numerous thunderstorms developing over land on Wednesday afternoon will move across our local waters during the late afternoon and evening hours, with stronger activity containing frequent lightning strikes and briefly gusty winds. A couple of surface troughs will edge southward across the local waters through the week bringing increased daily rain chances with high pressure remaining south of the region. .GULF STREAM... The approximate location of the west wall of the Gulf Stream as of Jul 27, 2021 at 1200 UTC... 56 nautical miles east northeast of Flagler Beach. 57 nautical miles east of Saint Augustine Beach. 61 nautical miles east of Jacksonville Beach. 67 nautical miles east of St Simons Island. This data courtesy of the Naval Oceanographic Office. $$ AMZ450-452-454-282115- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 851 AM EDT Wed Jul 28 2021 .REST OF TODAY...West winds 5 to 10 knots becoming southeast late in the afternoon. Seas 2 to 3 feet with a dominant period 9 seconds. A light chop on the intracoastal waters. Slight chance of showers and thunderstorms in the morning, then chance of showers and thunderstorms in the afternoon. .TONIGHT...Southwest winds 5 to 10 knots becoming west after midnight. Seas 2 to 3 feet with a dominant period 8 seconds. Mostly smooth on the intracoastal waters. Chance of showers in the evening. Slight chance of thunderstorms. Slight chance of showers after midnight. .THURSDAY...Northwest winds 5 knots becoming southeast 5 to 10 knots in the afternoon. Seas 2 to 3 feet with a dominant period 8 seconds. A light chop on the intracoastal waters. Slight chance of showers in the morning. Slight chance of thunderstorms. Chance of showers in the afternoon. .THURSDAY NIGHT...South winds 5 to 10 knots becoming southwest after midnight. Seas 2 feet. Mostly smooth on the intracoastal waters. .FRIDAY...Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet. A moderate chop on the intracoastal waters. .FRIDAY NIGHT...South winds 10 to 15 knots becoming southwest after midnight. Seas 2 to 3 feet. .SATURDAY...Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Chance of showers and thunderstorms. .SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Slight chance of showers and thunderstorms. .SUNDAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Chance of showers and thunderstorms. $$ AMZ470-472-474-282115- Waters from Altamaha Sound GA to Fernandina Beach FL from 20 to 60 NM- Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM- Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM- 851 AM EDT Wed Jul 28 2021 .REST OF TODAY...West winds 10 knots becoming 5 to 10 knots in the late morning and early afternoon, then becoming south 5 knots late in the afternoon. Seas 3 to 4 feet with a dominant period 9 seconds. Slight chance of showers and thunderstorms. .TONIGHT...Southwest winds 5 to 10 knots becoming west after midnight. Seas 2 to 3 feet with a dominant period 8 seconds. Chance of showers in the evening. Slight chance of thunderstorms. Slight chance of showers after midnight. .THURSDAY...Northwest winds 5 knots becoming south 5 to 10 knots in the afternoon. Seas 2 to 3 feet with a dominant period 8 seconds. Chance of showers and slight chance of thunderstorms. .THURSDAY NIGHT...Southwest winds 10 knots. Seas 2 to 3 feet. .FRIDAY...Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet. .FRIDAY NIGHT...Southwest winds 10 to 15 knots. Seas 3 to 4 feet. .SATURDAY...Southwest winds 10 to 15 knots. Seas 3 to 4 feet. Slight chance of showers and thunderstorms. .SATURDAY NIGHT...Southwest winds 10 to 15 knots. Seas 3 to 4 feet. Slight chance of showers and thunderstorms. .SUNDAY...Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Chance of showers and thunderstorms. $$