AMZ400-211530-
 Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
 824 PM EDT Mon Jul 20 2026
 
 
 .SYNOPSIS...
 
 Breezy southerly winds continue across the waters as a tropical
 depression in the Gulf strengthens into a Tropical Storm later today
 or tonight. The pressure gradient between the tropical system and
 the Bermuda high will lead to a long duration of breezy south winds
 to Exercise Caution level tonight. Southerly winds will increase
 to Small Craft Advisory levels by Tuesday or Tuesday night. The
 prolonged south winds will elevate seas up to 5 or possibly 6 feet
 through Tuesday. For the second half of the week, winds will
 decrease in strength as the tropical system moves farther west
 along the northern Gulf coast. While winds decrease, a shift to
 offshore flow will develop as a weak cold front approaches from
 the northwest by the end of the week and then stalls just north of
 the waters this weekend. Isolated strong thunderstorms with gusty
 winds may impact the area waters later this afternoon and again
 on Tuesday, mainly within 20 nm of the coast.
 
 
 .GULF STREAM...
 
 The approximate location of the west wall of the Gulf Stream as of
 Jul 20, 2026 at 0000 UTC...
 
 46 nautical miles east of Flagler Beach.
 49 nautical miles east of Saint Augustine Beach.
 64 nautical miles east southeast of Jacksonville Beach.
 71 nautical miles east southeast of St Simons Island.
 
 This data derived from NCEP Global RTOFS model.
 
 
 $$




 
 AMZ450-452-454-211530-
 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-
 824 PM EDT Mon Jul 20 2026
 
 SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 8 AM EDT
 TUESDAY
 SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
 LATE TUESDAY NIGHT
 

 REST OF TONIGHT
 South winds 15 to 20 knots. Seas 3 to 5 feet,
 occasionally to 6 feet. Wave Detail: Southeast 4 feet at
 6 seconds. Intracoastal waters choppy.

 TUESDAY
 South winds 15 to 20 knots, becoming southeast 20 to
 25 knots in the afternoon. Seas 3 to 4 feet, occasionally to
 5 feet, building to 4 to 6 feet, occasionally to 8 feet in the
 afternoon. Wave Detail: Southeast 4 feet at 6 seconds, becoming
 southeast 6 feet at 6 seconds. Intracoastal waters rough.

 TUESDAY NIGHT
 South winds 20 to 25 knots, diminishing to 15 to
 20 knots after midnight. Seas 4 to 6 feet, occasionally to
 8 feet. Wave Detail: Southeast 6 feet at 7 seconds. Intracoastal
 waters rough.

 WEDNESDAY
 South winds 10 to 15 knots, becoming southeast 15 to
 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to
 6 feet. Wave Detail: Southeast 5 feet at 6 seconds. Intracoastal
 waters choppy.

 WEDNESDAY NIGHT
 South winds 15 to 20 knots, becoming southwest
 10 to 15 knots after midnight. Seas 3 to 5 feet, occasionally to
 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. Intracoastal
 waters choppy.

 THURSDAY AND THURSDAY NIGHT
 Southwest winds 10 to 15 knots.
 Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast
 3 feet at 6 seconds. Intracoastal waters a moderate chop.

 FRIDAY
 South winds 10 to 15 knots. Seas 2 to 3 feet.
 Intracoastal waters a moderate chop.

 SATURDAY
 South winds 10 to 15 knots. Seas 2 to 3 feet.
 Intracoastal waters a moderate chop. A slight chance of showers
 and thunderstorms.
 
 Winds and waves higher in and near thunderstorms.
 
 $$