AMZ400-200015-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
514 AM EDT Sat Sep 19 2026
.SYNOPSIS...
A surface trough and disturbance aloft moving slowly westward
across the Florida peninsula this morning will emerge over the
southeast Gulf this afternoon. Widely scattered showers and
possibly a few thunderstorms should remain confined to the waters
from around St. Augustine southward today, with coverage then
slowly increasing throughout our local waters after midnight on
Saturday night and Sunday. Scattered to numerous showers and
thunderstorms are then expected early next week as the disturbance
aloft moves slowly r northeastward across our area. East to
northeasterly winds will otherwise prevail through the early
portions of next week, with speeds and seas remaining below
Caution levels. Strong high pressure building over southeastern
Canada and New England towards the middle portion of next week
will then wedge down the southeastern seaboard, resulting in surge
of northeasterly winds that will likely bring Small Craft
Advisory conditions to our local waters beginning later on
Wednesday and continuing through the late portions of next week.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Sep 18, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
58 nautical miles east of Saint Augustine Beach.
70 nautical miles east southeast of Jacksonville Beach.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-200015- 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- 514 AM EDT Sat Sep 19 2026 TODAY North winds 5 to 10 knots, becoming east northeast 10 to 15 knots late this morning. Seas 2 to 3 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters becoming a light chop. A slight chance of showers and thunderstorms. TONIGHT East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters mostly smooth. A chance of showers and thunderstorms, mainly after midnight. SUNDAY North winds 5 to 10 knots, becoming east northeast around 10 knots late in the morning. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds and east 2 feet at 11 seconds. Intracoastal waters becoming a light chop. A chance of showers and thunderstorms. SUNDAY NIGHT East around 10 knots, becoming east southeast around 5 knots after midnight. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds and east 2 feet at 11 seconds. Intracoastal waters becoming smooth. A chance of showers and thunderstorms. MONDAY Northeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. Intracoastal waters mostly smooth. A chance of showers and thunderstorms. MONDAY NIGHT East winds 5 to 10 knots, becoming southeast around 5 knots after midnight . Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. Intracoastal waters becoming smooth. A chance of showers and thunderstorms. TUESDAY North winds 5 to 10 knots, becoming east northeast around 10 knots during the afternoon. Seas around 2 feet. Intracoastal waters becoming a light chop. Showers likely with a chance of thunderstorms. TUESDAY NIGHT East winds 5 to 10 knots, becoming north northwest after midnight. Seas around 2 feet. Intracoastal waters mostly smooth. A chance of showers with a slight chance of thunderstorms. WEDNESDAY North winds around 10 knots, becoming northeast and increasing to around 15 knots during the afternoon. Seas building to 3 to 4 feet. Showers likely with a chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-454-200015- 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- 514 AM EDT Sat Sep 19 2026 TODAY North winds 5 to 10 knots, becoming east northeast 10 to 15 knots late this morning. Seas 2 to 3 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters becoming a light chop. A slight chance of showers and thunderstorms. TONIGHT East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 2 feet at 7 seconds. Intracoastal waters mostly smooth. A chance of showers and thunderstorms, mainly after midnight. SUNDAY North winds 5 to 10 knots, becoming east northeast around 10 knots late in the morning. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds and east 2 feet at 11 seconds. Intracoastal waters becoming a light chop. A chance of showers and thunderstorms. SUNDAY NIGHT East around 10 knots, becoming east southeast around 5 knots after midnight. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds and east 2 feet at 11 seconds. Intracoastal waters becoming smooth. A chance of showers and thunderstorms. MONDAY Northeast winds 5 to 10 knots. Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. Intracoastal waters mostly smooth. A chance of showers and thunderstorms. MONDAY NIGHT East winds 5 to 10 knots, becoming southeast around 5 knots after midnight . Seas around 2 feet. Wave Detail: East 2 feet at 8 seconds. Intracoastal waters becoming smooth. A chance of showers and thunderstorms. TUESDAY North winds 5 to 10 knots, becoming east northeast around 10 knots during the afternoon. Seas around 2 feet. Intracoastal waters becoming a light chop. Showers likely with a chance of thunderstorms. TUESDAY NIGHT East winds 5 to 10 knots, becoming north northwest after midnight. Seas around 2 feet. Intracoastal waters mostly smooth. A chance of showers with a slight chance of thunderstorms. WEDNESDAY North winds around 10 knots, becoming northeast and increasing to around 15 knots during the afternoon. Seas building to 3 to 4 feet. Showers likely with a chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$