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.
$$
GMZ450-290900- Coastal waters from Cameron LA to High Island TX out 20 NM- 310 PM CDT Mon Sep 28 2026 TONIGHT Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. TUESDAY Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. TUESDAY NIGHT Southeast winds 15 to 20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 4 feet at 5 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. WEDNESDAY Southeast winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 6 seconds. A slight chance of showers. A slight chance of thunderstorms after midnight. THURSDAY Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 6 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 15 to 20 knots. Seas 3 to 4 feet. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. FRIDAY Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a slight chance of thunderstorms. SATURDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. SATURDAY NIGHT East winds 10 to 15 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. $$
GMZ450-290900- Coastal waters from Cameron LA to High Island TX out 20 NM- 310 PM CDT Mon Sep 28 2026 TONIGHT Southeast winds around 10 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 3 seconds. TUESDAY Southeast winds 10 to 15 knots. Seas around 2 feet. Wave Detail: Southeast 2 feet at 4 seconds. TUESDAY NIGHT Southeast winds 15 to 20 knots. Seas 2 to 4 feet. Wave Detail: Southeast 4 feet at 5 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. WEDNESDAY Southeast winds 15 to 20 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms. WEDNESDAY NIGHT Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 6 seconds. A slight chance of showers. A slight chance of thunderstorms after midnight. THURSDAY Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 6 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 15 to 20 knots. Seas 3 to 4 feet. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. FRIDAY Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. FRIDAY NIGHT East winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely with a slight chance of thunderstorms. SATURDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. SATURDAY NIGHT East winds 10 to 15 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. $$