Marine Weather Net

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


TODAY

SW
WINDS
5 - 10
KNOTS

TONIGHT

S
WINDS
5 - 10
KNOTS

MONDAY

SW
WINDS
5 KNOTS

MONDAY NIGHT

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ555 Forecast Issued: 341 PM CDT Sun Jul 03 2022

Today...Southwest Winds 5 To 10 Knots, Becoming Southeast This Afternoon. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Tonight...South Winds 5 To 10 Knots. Seas Around 2 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight.
Monday...Southwest Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Monday Night...South Winds 5 To 10 Knots. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Tuesday...Northwest Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Tuesday Night...South Winds 5 To 10 Knots. Seas Around 2 Feet. A Slight Chance Of Showers And Thunderstorms In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight.
Wednesday...South Winds Around 5 Knots, Becoming Southeast In The Afternoon. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Wednesday Night...South Winds 5 To 10 Knots. Seas Around 2 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight.
Thursday...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. A Chance Of Showers And Thunderstorms.
Thursday Night...South Winds 5 To 10 Knots. Seas 2 To 3 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service New Orleans LA
337pm CDT Sunday July 3 2022

Short Term - Today Through Tuesday
An upper level analysis shows a broad trough moving across the northeast CONUS, another one coming into the PAC NW and a ridge encompassing pretty much everywhere else. The center of that ridge has been gradually shifting east and is now quite close to the CWA. There seems to be quite a bit of moisture still caught inside the ridge as models indicating PW's in the low 2" range. So while temps should increase with 500mb heigheights rising and some subsidence induced suppression of convection may occur, probably still looking at scattered thunderstorms each day during this period. The only appreciable change made to the forecast from NBM is higher POPs in the daily 00Z-03Z timeframe. NBM likes to drop coverage drastically after 00Z while typical dissipation of convection usually takes a few hours to actually occur. Forecast highs are between the 50th and 75th percentile range of the NBM, which is low/mid 90s and slightly above normal.

Long Term - Tuesday through Saturday
The overall forecast really doesn't change that much for the local area. Still looking at daily afternoon thunderstorms over land areas and nocturnal marine convection. The eventual location of the center of the ridge will play into what actual convective coverage is. The further it is away from the local area, the higher the rain chances will be and vice versa. While medium range operational GFS and ECMWF (European Centre for Medium-Range Weather Forecasts) showed slightly different movements of that ridge, today's runs look fairly similar with the center slowly retrograding west as the week progresses. NBM POPs are on the wetter side and today's forecast is no different.

Marine
Surface high pressure will generally remain centered in the northeastern Gulf of Mexico. This location will keep winds onshore and its proximity to the local coastal waters will only support winds in the 5-10kt range in the day and 8-13kt range at night. Daily showers and thunderstorms continue to be the main concern as scattered to numerous showers and storms persist. Coverage may decrease (but not disappear entirely) Monday as a weak upper level high pressure builds into the area, with only isolated to scattered convection in the forecast. A slight increase is expected to follow.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...None. GM...None. MS...None. GM...None.