Southwest Pass of the Mississippi River to Port Fourchon Louisiana Marine Forecast
| Today...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 7 Seconds. |
| Tonight...South Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: Southeast 2 Feet At 7 Seconds. |
| Friday...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Friday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Saturday...South Winds 5 To 10 Knots. Seas 1 To 2 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds. |
| Saturday Night...South Winds 5 To 10 Knots, Becoming West 10 To 15 Knots After Midnight. Seas 1 To 2 Feet. Wave Detail: Southeast 1 Foot At 5 Seconds. A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Sunday...Northeast Winds 20 To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 4 Feet At 4 Seconds. A Slight Chance Of Showers And Thunderstorms In The Morning. |
| Sunday Night...Northeast Winds 20 To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 5 Seconds. |
| Monday...East Winds 20 To 25 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 6 Seconds. |
| Monday Night...East Winds 15 To 20 Knots. Seas 2 To 4 Feet, Occasionally To 5 Feet. Wave Detail: East 4 Feet At 6 Seconds. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion National Weather Service New Orleans LA 642pm CDT Sunday May 10 2026 .SHORT TERM... (Now through Thursday night) Issued at 150pm CDT Sunday May 10 2026 A few isolated showers are ongoing over Plaquemines Parish this afternoon. Additional development south of I10/12 will be possible this afternoon, but as of now most of the activity has been right along the SE LA Coast. Apart from these showers the main focus is to our northwest where another MCS (Mesoscale Convective System, a complex of thunderstorms which becomes organized on a scale larger than the individual thunderstorms) is developing across northeast Texas this afternoon. Models both mesoscale and global are suggesting this complex of convection will dive southward in response to a strong cold pool. Because of this, expect overnight to be rather dry across the region (IF this pans out). That said, there could still be low stratus develop and perhaps some build down fog. The stratus and fog potential aside, back to the MCS this afternoon across Texas. Although initially this feature misses us to the west (as per guidance), the outflow may spark off additional showers and storms Monday and Monday evening. Again, mesoscale and global models are both on board with this general scenario. Unfortunately, given the setup a line of convection may develop from west to east along the surface frontal boundary and parallel to the mean upper flow. This will again cause ongoing hydro concerns across the region. Considered a FFA, but decided to hold off because the location of this line is a bit unknown. Outside of additional heavy rain today (which seems we are getting a break) there will be some hydro turnover. That plus...WPC estimates of only around an inch tomorrow on areal average, again decided to hold off on a watch for this package. Eventually, the front will move through as the upper level flow transitions to a more northwest flow. Not much in terms of a cool down is expected as upper heigheights quickly start to increase and lower rain chances mean temperatures will start to rebound with a warmer trend starting as early as Tuesday. Surface flow will also breakdown at a surface high pressure begins to spread into the region. (Frye) Long Term (Friday through Saturday night) Issued at 150pm CDT Sunday May 10 2026 Long term the pattern transitions aloft. In terms of weather, not much will change. Temperatures will still be in the middle and upper 80s. Conditions will remain rather dry and free of rainfall. That said, the upper flow does transition from a dry northwesterly flow to a more zonal flow and at the surface, high pressure moves east of the region gradually allowing for a more moisture rich environment to overspread the region from the Gulf. (Frye) Marine Issued at 150pm CDT Sunday May 10 2026 South to southeast winds of 10 to 15 knots will persist through tonight. Anticipating at least one to two more rounds of storms through Monday evening with some strong to severe storms possible across marine waters. Main threats will be wind gusts greater than 34 knots and waterspouts. A frontal boundary will move into the waters tonight into Monday, bringing moderate offshore winds briefly. Otherwise, marine conditions through the rest of the workweek appear to remain rather benign. (Frye) NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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