AMZ400-160615-
Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm-
1102 AM EDT Sun Mar 15 2026
.SYNOPSIS...
A warm front situated over the Georgia coastal waters will lift
northward this afternoon as a strong low pressure center pivots from
the Upper Midwest towards the Great Lakes states. Showers and
thunderstorms will develop late this afternoon and will continue
this evening, with strong to isolated severe storms possible. This
storm's system's cold front will enter the southeastern states late
tonight, crossing our local waters on Monday afternoon. Southerly
winds will strengthen over the offshore waters adjacent to northeast
Florida late this afternoon, where Small Craft Advisories are
expected to develop overnight. Southerly winds will strengthen near
shore this evening, and Small Craft Advisory conditions will likely
develop by the late morning or early afternoon hours on Monday.
Strong to severe thunderstorms are forecast to impact our local
waters on Monday, with the potential for damaging wind gusts,
waterspouts, and large hail.
Winds will shift to westerly during the passage of the strong cold
front on Monday afternoon, with strong northwesterly winds forecast
on Monday night and Tuesday morning throughout our local waters as
high pressure builds into the southeastern states. Winds will shift
to northerly on Tuesday afternoon and then northeasterly by
Wednesday as high pressure shifts northeastward towards the Mid-
Atlantic coast. This strengthening high pressure center will wedge
down the southeastern seaboard later this week, creating another
round of Small Craft Advisory conditions on Wednesday night and
Thursday. Winds and seas are expected to diminish by Friday
afternoon.
.GULF STREAM...
The approximate location of the west wall of the Gulf Stream as of
Mar 14, 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.
71 nautical miles east southeast of St Simons Island.
This data derived from NCEP Global RTOFS model.
$$
AMZ454-160615- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 1102 AM EDT Sun Mar 15 2026 REST OF TODAY South winds around 10 knots, becoming southeast and increasing to around 15 knots late this afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Intracoastal waters becoming a moderate chop. Showers and thunderstorms likely late this afternoon. Strong to isolated severe thunderstorms are possible late this afternoon, with stronger storms capable of producing damaging wind gusts, small hail, and frequent lightning strikes. TONIGHT South winds around 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Intracoastal waters choppy. Showers and thunderstorms, mainly in the evening. Strong to isolated severe thunderstorms are possible, with stronger storms capable of producing damaging wind gusts, small hail, and frequent lightning strikes. MONDAY Southwest winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: South 4 feet at 6 seconds. Intracoastal waters choppy. Showers and thunderstorms likely. Strong to severe thunderstorms are possible, with stronger storms capable of producing damaging wind gusts, hail, frequent lightning strikes, and waterspouts. MONDAY NIGHT West winds 20 to 25 knots, becoming northwest after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northwest 7 feet at 6 seconds and southeast 3 feet at 7 seconds. Intracoastal waters rough. A chance of showers with a slight chance of thunderstorms early in the evening. TUESDAY North winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: North 7 feet at 7 seconds and east 4 feet at 8 seconds. Intracoastal waters becoming choppy. TUESDAY NIGHT North winds around 15 knots, becoming north after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at 7 seconds. Intracoastal waters becoming a moderate chop. WEDNESDAY North winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters choppy. WEDNESDAY NIGHT AND THURSDAY North northeast winds 20 to 25 knots, becoming northeast and diminishing to 10 to 15 knots during the afternoon. Seas 6 to 8 feet, occasionally to 10 feet. Intracoastal waters rough. Winds and waves higher in and near thunderstorms. $$
AMZ454-160615- Coastal waters from St. Augustine to Flagler Beach FL out 20 NM- 1102 AM EDT Sun Mar 15 2026 REST OF TODAY South winds around 10 knots, becoming southeast and increasing to around 15 knots late this afternoon. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 7 seconds. Intracoastal waters becoming a moderate chop. Showers and thunderstorms likely late this afternoon. Strong to isolated severe thunderstorms are possible late this afternoon, with stronger storms capable of producing damaging wind gusts, small hail, and frequent lightning strikes. TONIGHT South winds around 15 knots, increasing to 15 to 20 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 6 seconds. Intracoastal waters choppy. Showers and thunderstorms, mainly in the evening. Strong to isolated severe thunderstorms are possible, with stronger storms capable of producing damaging wind gusts, small hail, and frequent lightning strikes. MONDAY Southwest winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: South 4 feet at 6 seconds. Intracoastal waters choppy. Showers and thunderstorms likely. Strong to severe thunderstorms are possible, with stronger storms capable of producing damaging wind gusts, hail, frequent lightning strikes, and waterspouts. MONDAY NIGHT West winds 20 to 25 knots, becoming northwest after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: Northwest 7 feet at 6 seconds and southeast 3 feet at 7 seconds. Intracoastal waters rough. A chance of showers with a slight chance of thunderstorms early in the evening. TUESDAY North winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave Detail: North 7 feet at 7 seconds and east 4 feet at 8 seconds. Intracoastal waters becoming choppy. TUESDAY NIGHT North winds around 15 knots, becoming north after midnight. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: North 4 feet at 7 seconds. Intracoastal waters becoming a moderate chop. WEDNESDAY North winds 15 to 20 knots. Seas 4 to 6 feet, occasionally to 8 feet. Intracoastal waters choppy. WEDNESDAY NIGHT AND THURSDAY North northeast winds 20 to 25 knots, becoming northeast and diminishing to 10 to 15 knots during the afternoon. Seas 6 to 8 feet, occasionally to 10 feet. Intracoastal waters rough. Winds and waves higher in and near thunderstorms. $$