AMZ400-140145-
 Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
 543 AM EST Sat Dec 13 2025
 
 
 .SYNOPSIS...
 
 High pressure centered over our local waters this morning will
 shift eastward this afternoon ahead of an Arctic cold front that
 will enter the southeastern states tonight. This strong cold front
 will cross our area from the northwest on Sunday, with only a few
 showers possible on Sunday night and Monday morning, mainly
 offshore. North-northwesterly winds will strengthen in the wake
 of this frontal passage on Sunday afternoon and will shift to
 north northeasterly on Sunday night. Small Craft Advisories will
 likely be issued for Sunday afternoon, with Gale Warnings also
 likely throughout our local waters on Sunday Night and Monday
 morning as winds shift to northeasterly as Arctic high pressure
 wedges down the southeastern seaboard. This high pressure center
 will gradually weaken over the southeastern states early next
 week as coastal troughing develops over our local waters. Onshore
 winds and seas will then gradually subside from Monday afternoon
 through Tuesday. Coastal troughing may generate a few showers
 early next week, mainly offshore. High pressure will then shift
 eastward and off the southeastern seaboard by midweek, with a
 weaker frontal boundary likely approaching our local waters late
 next week.
 
 
 .GULF STREAM...
 
 The approximate location of the west wall of the Gulf Stream as of
 Dec 06, 2025 at 1200 UTC...
 
 71 nautical miles east of Flagler Beach.
 74 nautical miles east of Saint Augustine Beach.
 85 nautical miles east southeast of Jacksonville Beach.
 97 nautical miles east southeast of St Simons Island.
 
 This data courtesy of the Naval Oceanographic Office.
 
 $$




 
 AMZ450-452-454-140145-
 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-
 543 AM EST Sat Dec 13 2025
 

 TODAY
 West northwest winds around 5 knots, becoming east
 southeast 5 to 10 knots this afternoon. Seas 1 to 2 feet.
 Intracoastal waters mostly smooth.

 TONIGHT
 South winds around 5 knots, becoming west 5 to 10 knots
 after midnight. Seas 1 to 2 feet. Intracoastal waters mostly
 smooth.

 SUNDAY
 West northwest winds around 10 knots, becoming
 north northwest and increasing to 20 to 25 knots in the
 afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail:
 Northwest 3 feet at 4 seconds. Intracoastal waters becoming rough.

 SUNDAY NIGHT
 North winds 25 to 30 knots, becoming north
 northeast after midnight. Frequent gusts to Gale Force likely.
 Seas 5 to 7 feet, occasionally to 9 feet, building to 6 to 9 feet,
 occasionally to 11 feet after midnight. Wave Detail:
 Northeast 7 feet at 7 seconds, becoming north 9 feet at 7 seconds.
 Intracoastal waters very rough.

 MONDAY
 Northeast winds 25 to 30 knots, diminishing to around
 20 knots in the afternoon. Frequent gusts to Gale Force possible
 during the early morning. Seas 6 to 9 feet, occasionally to 11
 feet. Wave Detail: Northeast 9 feet at 8 seconds. Intracoastal
 waters rough.

 MONDAY NIGHT
 Northeast winds 15 to 20 knots, becoming north 10
 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to 9
 feet. Wave Detail: Northeast 7 feet at 9 seconds. Intracoastal
 waters becoming a light chop.

 TUESDAY
 North winds 10 to 15 knots. Seas 3 to 5 feet,
 occasionally to 6 feet. Intracoastal waters a light chop.

 TUESDAY NIGHT AND WEDNESDAY
 Northeast winds 5 to 10 knots.
 Seas 2 to 3 feet. Intracoastal waters mostly smooth.
 
 $$