Marine Weather Net

Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast


TODAY

S
WINDS
5 - 10
KNOTS

TONIGHT

SW
WINDS
5 - 10
KNOTS

TUESDAY

E
WINDS
5 KNOTS

TUESDAY NIGHT

SE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ572 Forecast Issued: 954 AM CDT Mon May 27 2024

Today...South Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 4 Feet At 7 Seconds. A Slight Chance Of Showers Late This Morning. A Slight Chance Of Showers And Thunderstorms Early This Afternoon.
Tonight...Southwest Winds 5 To 10 Knots. Seas Around 3 Feet. Wave Detail: South 3 Feet At 6 Seconds.
Tuesday...East Winds Around 5 Knots. Seas 2 To 3 Feet. Wave Detail: South 3 Feet At 7 Seconds.
Tuesday Night...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds.
Wednesday...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. A Slight Chance Of Showers. A Slight Chance Of Thunderstorms In The Afternoon.
Wednesday Night...Southeast Winds Around 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. A Slight Chance Of Showers After Midnight.
Thursday...Southeast Winds Around 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 6 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers, Mainly In The Morning.
Thursday Night...Southeast Winds Around 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds.
Friday...Southeast Winds Around 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds.
Friday Night...Southeast Winds 10 To 15 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service New Orleans LA
645am CDT Monday May 27 2024

Long Term
(Tuesday night through Sunday) Issued at 350am CDT Monday May 27 2024

Quite a bit of disagreement in medium range rain chances between the GFS (Global Forecast System) based and ECMWF (European Centre for Medium-Range Weather Forecasts) based guidance. The area will be in northwesterly mid level flow for Wednesday through at least Friday. With the exception of agreement on a shortwave producing thunderstorms Wednesday afternoon, the ECMWF solutions are much drier than the GFS solutions. With the trough axis to the east of the area, there's a tendency to downplay any convective threat, but I've seen too many times that convection around the periphery of a ridge tends to "overperform". We'll keep some mention of afternoon convection in the forecast. By the weekend, the model families flip with the ECMWF solutions the wetter choice.

High temperature forecast will obviously be tied to precipitation chances, with the drier model solution the hotter one. For now, will go with the NBM deterministic, hoping for better agreement between the model families. Overnight lows should be at least slightly more comfortable beyond Tuesday night with slightly drier air in place.

Marine
Issued at 350am CDT Monday May 27 2024

With the boundary to the north expected to weaken, the weaker pressure gradient should allow winds to diminish a bit later this morning. Current plan is to let Small Craft Exercise Caution headlines expire. Once that occurs, we should be in a pattern that will be driven by diurnal heat processes with onshore/offshore diurnal trends. This usually doesn't result in wind speeds strong enough to require headlines.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...
Heat Advisory from noon today to 8pm CDT this evening for LAZ034>037-039-046>048-056>060-064-065-071-076>090.

GM...None. MS...
Heat Advisory from noon today to 8pm CDT this evening for MSZ068-077-083-084-086-087.

GM...None.