Marine Weather Net

Boothville, LA to Southwest Pass of the Mississippi River Marine Forecast


TODAY

SW
WINDS
10 - 15
KNOTS

TONIGHT

SW
WINDS
5 - 10
KNOTS

TUESDAY

N
WINDS
5 KNOTS

TUESDAY NIGHT

SW
WINDS
5 KNOTS

The Marine Weather Forecast In Detail:
GMZ555 Forecast Issued: 702 AM CDT Mon May 27 2024

Today...Southwest Winds 10 To 15 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: South 3 Feet At 6 Seconds. A Slight Chance Of Showers And Thunderstorms Early This Afternoon.
Tonight...Southwest Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: South 3 Feet At 6 Seconds.
Tuesday...North Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas 2 To 3 Feet. Wave Detail: South 3 Feet At 6 Seconds.
Tuesday Night...Southwest Winds Around 5 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 6 Seconds.
Wednesday...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 5 Seconds. A Slight Chance Of Showers And Thunderstorms In The Afternoon.
Wednesday Night...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet In The Evening, Then 1 Foot Or Less. Wave Detail: Southeast 1 Foot At 4 Seconds, Becoming Southeast 1 Foot At 5 Seconds.
Thursday...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: East 1 Foot At 4 Seconds And South 1 Foot At 5 Seconds. A Slight Chance Of Showers And Thunderstorms.
Thursday Night...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet In The Evening, Then 1 Foot Or Less. Wave Detail: Southeast 1 Foot At 5 Seconds, Becoming Southeast 1 Foot At 4 Seconds.
Friday...East Winds 5 To 10 Knots. Seas 1 Foot Or Less, Then Around 2 Feet In The Afternoon. Wave Detail: Southeast 1 Foot At 4 Seconds. A Slight Chance Of Showers And Thunderstorms In The Morning.
Friday Night...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 1 Foot 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.