AMZ400-210900-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
224 PM EDT Sat Jun 20 2026
.SYNOPSIS...
A frontal boundary will move toward the area waters tonight but then
shift back north. This front will help bring a round of
thunderstorms to area waters through tonight. Some of these storms
may produce strong gusty winds, frequent lightning and very heavy
rain. A good chance of thunderstorms is expected again Sunday
afternoon and evening. Weak high pressure ridge will slowly build in
over the area waters early Monday and into Tuesday with isolated to
scattered thunderstorms returning by midweek as another front moves
in from the north. Stronger offshore winds with exercise caution
level winds looks possible for offshore waters Monday into Tuesday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Jun 20, 2026 at 0000 UTC...
50 nautical miles east of Flagler Beach.
53 nautical miles east of Saint Augustine Beach.
64 nautical miles east southeast of Jacksonville Beach.
76 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ450-452-454-210900- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 224 PM EDT Sat Jun 20 2026 REST OF TODAY South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters light chop. Showers and thunderstorms likely. TONIGHT West winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters a moderate chop. Showers likely with a chance of thunderstorms in the evening. SUNDAY Northwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the afternoon. SUNDAY NIGHT Southwest winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. MONDAY West winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas around 2 feet. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms in the afternoon. MONDAY NIGHT South winds 10 to 15 knots, becoming southwest after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters a moderate chop. TUESDAY THROUGH WEDNESDAY Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-454-210900- 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- 224 PM EDT Sat Jun 20 2026 REST OF TODAY South winds 5 to 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters light chop. Showers and thunderstorms likely. TONIGHT West winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 7 seconds. Intracoastal waters a moderate chop. Showers likely with a chance of thunderstorms in the evening. SUNDAY Northwest winds 5 to 10 knots, becoming southeast in the afternoon. Seas around 2 feet. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the afternoon. SUNDAY NIGHT Southwest winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. MONDAY West winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas around 2 feet. Intracoastal waters a moderate chop. A slight chance of showers and thunderstorms in the afternoon. MONDAY NIGHT South winds 10 to 15 knots, becoming southwest after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. Intracoastal waters a moderate chop. TUESDAY THROUGH WEDNESDAY Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Intracoastal waters a moderate chop. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$