Marine Weather Net

Southwest Pass of the Mississippi River to Port Fourchon Louisiana Marine Forecast


TODAY

S
WINDS
15 - 20
KNOTS

TONIGHT

S
WINDS
20 - 25
KNOTS

SUNDAY

NW
WINDS
15 - 20
KNOTS

SUNDAY NIGHT

N
WINDS
15 - 20
KNOTS

The Marine Weather Forecast In Detail:
GMZ552 Forecast Issued: 341 AM CST Sat Feb 15 2025

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL NOON CST TODAY ...SMALL CRAFT ADVISORY IN EFFECT FROM NOON CST TODAY THROUGH SUNDAY MORNING...
Today...South Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 7 Seconds. A Slight Chance Of Showers And Thunderstorms Late.
Tonight...South Winds 20 To 25 Knots, Becoming West After Midnight. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: South 6 Feet At 7 Seconds. A Chance Of Thunderstorms. A Slight Chance Of Showers In The Evening, Then Showers After Midnight.
Sunday...Northwest Winds 15 To 20 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 7 Seconds And Northwest 4 Feet At 4 Seconds.
Sunday Night...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 3 Feet At 8 Seconds.
Monday...Northeast Winds 15 To 20 Knots, Becoming East 10 To 15 Knots In The Afternoon. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Northeast 2 Feet At 2 Seconds And Southeast 2 Feet At 7 Seconds.
Monday Night...East Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: East 2 Feet At 3 Seconds And Southeast 1 Foot At 7 Seconds.
Tuesday...East Winds 10 To 15 Knots, Increasing To 15 To 20 Knots In The Afternoon. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 6 Seconds. A Chance Of Showers And Thunderstorms In The Afternoon.
Tuesday Night...Southeast Winds 15 To 20 Knots, Becoming South After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southeast 5 Feet At 6 Seconds. Showers With A Chance Of Thunderstorms.
Wednesday...North Winds 20 To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: South 5 Feet At 7 Seconds And North 3 Feet At 3 Seconds. Showers Likely With A Chance Of Thunderstorms In The Morning, Then A Chance Of Showers With A Slight Chance Of Thunderstorms In The Afternoon.
Wednesday Night...North Winds 20 To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: Southeast 2 Feet At 7 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms In The Evening, Then A Slight Chance Of Showers After Midnight. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service New Orleans LA
341am CST Sat Feb 15 2025

Long Term
(Sunday night through Friday) Issued at 331am CST Sat Feb 15 2025

The next frontal system that moves through looks to do so by late Tuesday into Wed. This one could be a bit different as a surface low may form near the coast and move ENE. This would keep the severe weather along and south of the coast. But heavy rainfall would still be a possibility with this system as the H3 jet is still active along with the subtrop jet during that period, so flooding issues will remain on the table for this especially if there is any slowing of it. The system after mid week looks to greet the area by the start of the next week so we won't look at that until it moves into the fcast.

Marine
Issued at 331am CST Sat Feb 15 2025

SE winds of around 20kt will rise to around 25kt and continue until frontal passage shifts winds to NW while speeds remain around 25kt. As winds shift from NW to NE early Monday, speeds will begin to lower to around 10kt. Storms will accompany this front over the weekend and some of these could become strong to severe. Winds will continue to shift to E Monday then SE by Tuesday and rise to 15-20kt ahead of the next frontal system that should impact the northern gulf Tuesday night through Wed.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...None. GM...Small Craft Advisory from noon today to 9am CST Sunday for GMZ530-550-552.

Small Craft Advisory from 9pm this evening to 9am CST Sunday for GMZ532-534-536-538-555-557-575-577.

Small Craft Advisory until 9am CST Sunday for GMZ570-572.

MS...None. GM...Small Craft Advisory from noon today to 9am CST Sunday for GMZ550-552.

Small Craft Advisory from 9pm this evening to 9am CST Sunday for GMZ534-536-538-555-557-575-577.

Small Craft Advisory until 9am CST Sunday for GMZ572.