GMZ400-290900-
310 PM CDT Mon Sep 28 2026
.Synopsis for Lower Atchafalaya River LA to High Island TX out
60 NM including Sabine and Calcasieu Lakes and Vermilion and Cote
Blanche Bays...
Flow will become onshore starting tonight and remain onshore for
the rest of the week. Low pressure from the Great Plains will move
north of us around midweek, increasing wind speeds. Small Craft
Advisories may be needed on Wednesday and Thursday. In addition,
the onshore flow is aligning with higher-than-usual tides, which
could cause minor coastal flooding during the second half of the
week.
$$
GMZ455-290900- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 310 PM CDT Mon Sep 28 2026 TONIGHT Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 2 seconds. TUESDAY Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 1 foot or less, then around 2 feet in the afternoon. Wave Detail: Southeast 1 foot at 3 seconds. TUESDAY NIGHT Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds. WEDNESDAY Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon. WEDNESDAY NIGHT Southeast winds 15 to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of showers in the evening. THURSDAY Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds and southeast 2 feet at 3 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. THURSDAY NIGHT Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. FRIDAY Southeast winds 10 to 15 knots. Seas around 2 feet. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. FRIDAY NIGHT East winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. SATURDAY East winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. SATURDAY NIGHT East winds around 10 knots. Seas around 2 feet. A slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and seas higher in and near thunderstorms. $$
GMZ455-290900- Coastal waters from Lower Atchafalaya River to Intracoastal City LA out 20 NM- 310 PM CDT Mon Sep 28 2026 TONIGHT Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave Detail: South 1 foot at 2 seconds. TUESDAY Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 1 foot or less, then around 2 feet in the afternoon. Wave Detail: Southeast 1 foot at 3 seconds. TUESDAY NIGHT Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 3 seconds. WEDNESDAY Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon. WEDNESDAY NIGHT Southeast winds 15 to 20 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds. A slight chance of showers in the evening. THURSDAY Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave Detail: South 3 feet at 6 seconds and southeast 2 feet at 3 seconds. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. THURSDAY NIGHT Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms. FRIDAY Southeast winds 10 to 15 knots. Seas around 2 feet. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. FRIDAY NIGHT East winds around 10 knots. Seas around 2 feet. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. SATURDAY East winds 10 to 15 knots. Seas around 2 feet. Showers likely with a chance of thunderstorms. SATURDAY NIGHT East winds around 10 knots. Seas around 2 feet. A slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Winds and seas higher in and near thunderstorms. $$