Hazardous marine condition(s):
Small Craft Advisory
GMZ500-GMZ501-012300-
437 AM CST Mon Dec 1 2025
.SYNOPSIS FOR PASCAGOULA TO ATCHAFALAYA RIVER OUT 60 NM...
Changes since last update: Added Small Craft Advisory for GMZ575 and
577 in effect through noon Monday. Exercise caution for all waters
expect MS sound and Lake Pontchartrain/Maurepas from Noon Monday
through 9PM Monday night.
New: Small Craft Advisory in effect for all waters 9PM Monday
through 3PM Tuesday.
Tonight, a recent frontal passage has introduced gusty wind at
around 18-22kts from the NE, which will persist overnight into
Monday morning ahead of the next developing surface low over the
western Gulf. As this low drifts northeast, it'll cross gulf waters
providing a round of heavy rain and thunderstorms primarily from
Monday afternoon through early Tuesday morning. In any one storm,
waterspouts, winds <34kts and locally higher waves/seas can be
expected. As this low passes, confidence on how strong winds will
remain outside of thunderstorms remains in question. There is now
exercise caution headlines as the low passes, but could be upgraded
to advisory if conditions warrant. Then, as the low passes early
Tuesday to the NE, strong NW winds will increase across waters at
around 15-20kts, with the 2nd round of Advisory headlines in effect.
Waves/seas will respond reaching around 5-7ft in this time frame
mainly for Gulf waters, 3-5ft for protected waters. High pressure
builds into the region mid-week, with winds and waves/seas calming
down, but still expecting another system to impact the region
Thursday and Friday, with increasing winds and shower/thunderstorm
activity expected.
$$
GMZ550-552-012300- Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm- Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM- 437 AM CST Mon Dec 1 2025 SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON CST TODAY SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM NOON CST TODAY THROUGH THIS EVENING SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH TUESDAY AFTERNOON TODAY Northeast winds 15 to 20 knots, becoming east 10 to 15 knots late. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. A slight chance of showers this morning, then showers likely with a slight chance of thunderstorms this afternoon. TONIGHT Northeast winds 10 to 15 knots, becoming north 15 to 20 knots with gusts up to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 3 seconds and southeast 3 feet at 7 seconds. A slight chance of thunderstorms. Showers likely, mainly in the evening. TUESDAY North winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 4 feet at 4 seconds and southeast 2 feet at 6 seconds. TUESDAY NIGHT Northeast winds 10 to 15 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet after midnight. Wave Detail: North 2 feet at 3 seconds and southeast 1 foot at 6 seconds, becoming northeast 2 feet at 3 seconds and southeast 1 foot at 6 seconds. WEDNESDAY East winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds and southeast 1 foot at 6 seconds. WEDNESDAY NIGHT Southeast winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 3 seconds and southeast 1 foot at 6 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Showers likely with a slight chance of thunderstorms. THURSDAY NIGHT Southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. FRIDAY Southwest winds 10 to 15 knots, becoming west in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 4 feet at 5 seconds. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. FRIDAY NIGHT Northwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 3 feet at 6 seconds and northwest 2 feet at 3 seconds. Showers likely with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$
GMZ550-552-012300- Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm- Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM- 437 AM CST Mon Dec 1 2025 SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON CST TODAY SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM NOON CST TODAY THROUGH THIS EVENING SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH TUESDAY AFTERNOON TODAY Northeast winds 15 to 20 knots, becoming east 10 to 15 knots late. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: East 4 feet at 6 seconds. A slight chance of showers this morning, then showers likely with a slight chance of thunderstorms this afternoon. TONIGHT Northeast winds 10 to 15 knots, becoming north 15 to 20 knots with gusts up to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: North 3 feet at 3 seconds and southeast 3 feet at 7 seconds. A slight chance of thunderstorms. Showers likely, mainly in the evening. TUESDAY North winds 15 to 20 knots with gusts up to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Northwest 4 feet at 4 seconds and southeast 2 feet at 6 seconds. TUESDAY NIGHT Northeast winds 10 to 15 knots. Seas 2 to 3 feet, subsiding to 1 to 2 feet after midnight. Wave Detail: North 2 feet at 3 seconds and southeast 1 foot at 6 seconds, becoming northeast 2 feet at 3 seconds and southeast 1 foot at 6 seconds. WEDNESDAY East winds 5 to 10 knots. Seas 1 to 2 feet. Wave Detail: East 1 foot at 3 seconds and southeast 1 foot at 6 seconds. WEDNESDAY NIGHT Southeast winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 1 to 2 feet. Wave Detail: Southeast 2 feet at 3 seconds and southeast 1 foot at 6 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. THURSDAY East winds 10 to 15 knots. Seas 2 to 3 feet. Wave Detail: Southeast 2 feet at 4 seconds. Showers likely with a slight chance of thunderstorms. THURSDAY NIGHT Southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 3 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. FRIDAY Southwest winds 10 to 15 knots, becoming west in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 4 feet at 5 seconds. Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. FRIDAY NIGHT Northwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: South 3 feet at 6 seconds and northwest 2 feet at 3 seconds. Showers likely with a slight chance of thunderstorms. Winds and seas higher in and near thunderstorms. $$