Hazardous marine condition(s):
Small Craft Advisory
Gale Warning
AMZ400-122200-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
326 AM EDT Thu Mar 12 2026
.SYNOPSIS...
Southerly winds remain elevated ahead of an approaching cold front,
creating Caution conditions throughout our local waters. Winds may
subside slightly through early this morning before increasing winds
from the south southwest into late this morning ahead of a line of
strong thunderstorms approaching from the west. Showers and storms
will impact our local waters during the early to mid afternoon
hours, with a few stronger storms possible that could produce gusty
winds and frequent lightning strikes. Winds will shift to westerly
during the frontal passage before increasing northwest winds arrive
this afternoon to small craft advisory levels followed by Gale
conditions early this evening into early Friday as winds turn more
north northeasterly as high pressure builds to the north. Winds and
seas will remain elevated into Friday morning before subsiding
Friday afternoon as high pressure shifts to the northeast.
As the high moves away, a warm front will slowly lift northward
along the Florida peninsula. Chances for showers and thunderstorms
will begin to increase from south to north late Saturday night
through Sunday night as this warm front moves across our area. A
strong cold front will move through our area Monday, with southwest
winds increasing and becoming northwesterly behind the front with
small craft advisory conditions returning to the waters through
Tuesday.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Mar 11, 2026 at 0000 UTC...
46 nautical miles east of Flagler Beach.
53 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.
$$
AMZ450-452-122200- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- 326 AM EDT Thu Mar 12 2026 SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS EVENING GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT TODAY Southwest winds around 15 knots, becoming northwest 20 to 25 knots this afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 3 feet at 3 seconds and south 3 feet at 6 seconds. Intracoastal waters rough. A chance of showers this morning, then showers with a slight chance of thunderstorms this afternoon. TONIGHT Northeast winds 25 to 30 knots with gusts up to 40 knots. Seas 4 to 6 feet, occasionally to 8 feet, building to 5 to 8 feet, occasionally to 10 feet after midnight. Wave Detail: North 6 feet at 6 seconds and east 6 feet at 8 seconds, becoming northeast 8 feet at 6 seconds. Intracoastal waters very rough. FRIDAY East winds 15 to 20 knots, becoming northeast 5 to 10 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 8 seconds. Intracoastal waters choppy. FRIDAY NIGHT Northeast winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds. Intracoastal waters light chop. SATURDAY Northeast winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the afternoon. SATURDAY NIGHT Southeast winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. SUNDAY Southeast winds 10 to 15 knots, becoming south 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal waters choppy. A slight chance of thunderstorms in the morning. Showers likely through the day. A chance of thunderstorms through the night. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. MONDAY Southwest winds 15 to 20 knots, becoming northwest 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters very rough. Showers likely in the morning. A chance of thunderstorms through the day. A chance of showers in the afternoon, then a slight chance of thunderstorms in the evening. A slight chance of showers through the night. Winds and waves higher in and near thunderstorms. $$
AMZ450-452-122200- Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM- Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM- 326 AM EDT Thu Mar 12 2026 SMALL CRAFT ADVISORY IN EFFECT FROM THIS AFTERNOON THROUGH THIS EVENING GALE WARNING IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT TODAY Southwest winds around 15 knots, becoming northwest 20 to 25 knots this afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 3 feet at 3 seconds and south 3 feet at 6 seconds. Intracoastal waters rough. A chance of showers this morning, then showers with a slight chance of thunderstorms this afternoon. TONIGHT Northeast winds 25 to 30 knots with gusts up to 40 knots. Seas 4 to 6 feet, occasionally to 8 feet, building to 5 to 8 feet, occasionally to 10 feet after midnight. Wave Detail: North 6 feet at 6 seconds and east 6 feet at 8 seconds, becoming northeast 8 feet at 6 seconds. Intracoastal waters very rough. FRIDAY East winds 15 to 20 knots, becoming northeast 5 to 10 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northeast 7 feet at 8 seconds. Intracoastal waters choppy. FRIDAY NIGHT Northeast winds 5 to 10 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: East 5 feet at 8 seconds. Intracoastal waters light chop. SATURDAY Northeast winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the afternoon. SATURDAY NIGHT Southeast winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 3 feet at 8 seconds. Intracoastal waters light chop. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. SUNDAY Southeast winds 10 to 15 knots, becoming south 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Intracoastal waters choppy. A slight chance of thunderstorms in the morning. Showers likely through the day. A chance of thunderstorms through the night. A chance of showers in the evening, then showers likely with a slight chance of thunderstorms after midnight. MONDAY Southwest winds 15 to 20 knots, becoming northwest 25 to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters very rough. Showers likely in the morning. A chance of thunderstorms through the day. A chance of showers in the afternoon, then a slight chance of thunderstorms in the evening. A slight chance of showers through the night. Winds and waves higher in and near thunderstorms. $$