Breton Sound Marine Forecast
| Today...Southeast Winds 5 To 10 Knots. Waves 1 Foot Or Less, Then Around 2 Feet This Afternoon. |
| Tonight...South Winds 5 To 10 Knots. Waves Around 2 Feet In The Evening, Then 1 Foot Or Less. |
| Friday...South Winds 5 To 10 Knots. Waves 1 Foot Or Less, Then Around 2 Feet In The Afternoon. |
| Friday Night...South Winds Around 10 Knots. Waves Around 2 Feet. |
| Saturday...South Winds 5 To 10 Knots. Waves Around 2 Feet. |
| Saturday Night...South Winds 5 To 10 Knots, Becoming West 10 To 15 Knots With Gusts Up To 20 Knots After Midnight. Waves 2 To 4 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Sunday...North Winds 20 To 25 Knots. Waves 4 To 5 Feet. A Slight Chance Of Showers And Thunderstorms In The Morning. |
| Sunday Night...Northeast Winds 20 To 25 Knots. Waves 4 To 5 Feet. |
| Monday...Northeast Winds 20 To 25 Knots, Becoming East 15 To 20 Knots In The Afternoon. Waves 3 To 5 Feet. |
| Monday Night...East Winds 15 To 20 Knots. Waves 3 To 4 Feet. Winds And Waves Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 634pm CDT Wednesday August 5 2026 .SHORT TERM... (Now through Saturday night) Issued at 1257pm CDT Wednesday August 5 2026 A fairly typical August atmospheric set up. Generally, at the surface we are on the western periphery of the Bermuda high and in the upper levels we have high pressure to the west and east with a very weak corridor of slightly lower pressure in between. This brings the typical August weather of afternoon showers and weak storms following mesoscale boundaries and offshore convection overnight into the very early morning hours. Temperatures are also typical with lows in the lower to mid 70s an highs in the lower to mid 90s. The afternoon cloud cover will help to manage the highs and keep us just below the thresholds for heat headlines. Long Term (Sunday through Tuesday night) Issued at 1257pm CDT Wednesday August 5 2026 A fairly typical summertime pattern will be in place through the extended period. Broad troughing extending across the central and eastern CONUS will keep stronger upper-level ridging displaced west of the region, while the western periphery of the Bermuda ridge maintains generally south to southeast low-level flow across the central Gulf Coast. This will continue transporting deeper Gulf moisture into the area, with precipitable water values above 2 inches through much of the period. With no well-defined synoptic forcing expected, convection will primarily be driven by daytime heating and mesoscale boundaries. Showers and thunderstorms will initially develop over the coastal waters during the overnight and morning hours before transitioning inland along the sea breeze during the afternoon. Additional development will be possible along outflow boundaries from earlier convection. Scattered to numerous coverage is expected each day, generally favoring southern and coastal portions of the CWA (County Warning Area) early before spreading farther inland during peak heating. Weak steering flow through much of the column will favor slow-moving, pulse-type storms capable of producing frequent lightning, brief gusty winds, and locally heavy rainfall. Convective coverage and placement will likely vary considerably from one location to another each day. Little meaningful change in the overall pattern is currently apparent Monday and Tuesday. The region should remain beneath weak flow aloft with ample moisture and only subtle forcing, allowing the daily marine and sea-breeze convective cycle to continue. Any weak perturbations embedded within the flow could locally enhance coverage, but confidence remains low regarding their timing and placement at this range. Temperatures will be near to slightly above early-August normals. Afternoon highs should generally reach the lower to mid 90s across inland areas, with upper 80s to lower 90s closer to the immediate coast. Earlier convective development may hold some locations several degrees cooler. Overnight lows will range from the lower to mid 70s inland to the upper 70s near the coast and tidal lakes. The combination of increasing humidity and temperatures in the 90s will produce afternoon heat index values generally in the 100 to 107 degree range. A few locations could briefly approach Heat Advisory criteria before convection develops, but widespread hazardous heat is not currently anticipated. [Meffer/Schlotz] Marine Issued at 1257pm CDT Wednesday August 5 2026 Surface high-pressure axis over the southern Gulf is being absorbed by the Bermuda ridge. The low- level pressure gradient may tighten slightly Friday into the weekend as surface high pressure becomes better established over the eastern Gulf while lower pressures persist over the southern Plains and lower Mississippi Valley. This will alter flow to more of a south to southeast direction Thursday and then southeasterly to easterly through the weekend. Speeds should generally remain around 5 to 10 knots, although periods of 10 to 15 knots will be possible over the outer waters as an easterly fetch becomes better established late in the week. Seas will generally remain 1 to 2 feet through Thursday. Increasing Gulf moisture will also bring a gradual increase in showers and thunderstorms beginning Thursday and continuing through the weekend and into early next week. Convection will be most common, in typical summertime fashion, over the coastal waters during the overnight and morning hours. Then activity shifts inland with the developing sea breeze during the afternoons. /Schlotz/ NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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