Marine Weather Net

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


TODAY

NE
WINDS
15 - 20
KNOTS

TONIGHT

NE
WINDS
5 KNOTS

WEDNESDAY

E
WINDS
5 KNOTS

WEDNESDAY NIGHT

SE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ552 Forecast Issued: 404 AM CDT Tue Mar 19 2024

SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM CDT THIS MORNING ...SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL 11 AM CDT THIS MORNING...
Today...Northeast Winds 15 To 20 Knots With Gusts Up To 25 Knots, Diminishing To 5 To 10 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet.
Tonight...Northeast Winds Around 5 Knots. Seas 1 To 2 Feet In The Evening, Then 1 Foot Or Less.
Wednesday...East Winds Around 5 Knots. Seas 1 Foot Or Less, Then 1 To 2 Feet In The Afternoon.
Wednesday Night...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. A Slight Chance Of Showers After Midnight.
Thursday...East Winds 10 To 15 Knots With Gusts Up To 25 Knots. Seas 1 To 2 Feet, Building To 2 To 3 Feet In The Afternoon. A Chance Of Showers.
Thursday Night...East Winds 15 To 20 Knots. Gusts Up To 30 Knots In The Evening. Seas 2 To 4 Feet, Occasionally To 5 Feet. Showers And Thunderstorms Likely.
Friday...Northeast Winds 10 To 15 Knots, Becoming North In The Afternoon. Seas 2 To 4 Feet, Occasionally To 5 Feet. A Slight Chance Of Showers And Thunderstorms In The Morning.
Friday Night...North Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet.
Saturday...North Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet.
Saturday Night...Northeast Winds 5 To 10 Knots. Seas Around 2 Feet. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service New Orleans LA
359am CDT Tuesday Mar 19 2024

Long Term
(Wednesday night through Monday) Issued at 358am CDT Tuesday Mar 19 2024

A cutoff upper low currently centered over Southern California will begin tracking east as deep trough now over the eastern US moves offshore. Model evolution of this feature suggests that the closed low will open up into more of a shortwave trough as it tracks east across the southern tier of the country. Operational global models are quite close in timing and placement of this system, with it tracking across the Lower Mississippi Valley on Friday. As showers and thunderstorms develop along the appendant cold front, will have to monitor for severe weather. Model soundings suggest a strong warm nose for the northern 2/3rd of the CWA (County Warning Area) will keep any storms from being surface based. Elevated instability and very low wbz values (8- 10kft) could support hail. Shear dropping off while instability increases isn't a conduce setup. The only area in the CWA where there may be any real chance for severe storms appears to be right along the LA coastline where surface temps could be warm enough to aide storms in being surface based.

Benign weather returns this weekend as the shortwave shifts east and zonal flow develops aloft. Near to above normal temps with no rain in the forecast for that period.

Marine
Issued at 358am CDT Tuesday Mar 19 2024

Most recent cold front that moved through is now well south of the local area, almost down to the Yucatan Peninsula. Surface ridge behind that boundary is currently centered near the Arklatex will continue southward today, reaching the northern Gulf Coast later this evening. As it does so, the local pressure gradient will drastically weaken which will diminish ongoing elevated winds. Thus, will carry on current short-term marine hazards in place, both of which fall off before noon today.

The nearby surface high will slide east over the next few days which will bring the return of onshore winds. Expect them to remain there for the majority of the week. Should begin to see a gradual increase in winds/seas in the latter half of the week as a shortwave tracks across the southeastern US. Low-end small craft conditions will be possibly leading up to and after this system passes as the pressure gradient supports those wind conditions.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...Freeze Warning until 8am CDT this morning for LAZ034>037-039- 071.

GM...Small Craft Advisory until 7am CDT this morning for GMZ530-532- 534-536-538-550-552-555-557-570-572-575-577.

MS...Freeze Warning until 8am CDT this morning for MSZ068>071-077.

GM...Small Craft Advisory until 7am CDT this morning for GMZ532-534- 536-538-550-552-555-557-570-572-575-577.