Mississippi Sound GMZ532 Marine Forecast
| This Afternoon...Southwest Winds 10 To 15 Knots With Gusts Up To 20 Knots. Waves Around 3 Feet. Showers And Thunderstorms Likely Early, Then A Chance Of Showers And Thunderstorms Late. |
| Tonight...Southwest Winds 10 To 15 Knots. Waves 2 To 3 Feet. A Chance Of Showers And Thunderstorms. |
| Saturday...Southwest Winds 5 To 10 Knots. Waves 1 Foot Or Less, Then Around 2 Feet In The Afternoon. A Chance Of Showers And Thunderstorms. |
| Saturday Night...Southwest Winds 5 To 10 Knots. Waves Around 2 Feet. |
| Sunday...West Winds Around 5 Knots, Becoming Southwest In The Afternoon. Waves 1 Foot Or Less, Then Around 2 Feet In The Afternoon. A Slight Chance Of Showers And Thunderstorms In The Morning, Then A Chance Of Showers And Thunderstorms In The Afternoon. |
| Sunday Night...Southwest Winds Around 10 Knots. Waves Around 2 Feet. |
| Monday...West Winds 5 To 10 Knots, Becoming Southwest In The Afternoon. Waves 1 To 2 Feet. A Slight Chance Of Showers And Thunderstorms. |
| Monday Night...Southwest Winds Around 10 Knots. Waves Around 2 Feet. A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Tuesday...Northwest Winds 5 To 10 Knots, Becoming West In The Afternoon. Waves 1 To 2 Feet. A Chance Of Showers And Thunderstorms, Mainly In The Morning. |
| Tuesday Night...West Winds 5 To 10 Knots. Waves Around 2 Feet. A Slight Chance Of Showers And Thunderstorms In The Evening, Then A Chance Of Showers And Thunderstorms After Midnight. Winds And Waves Higher In And Near Thunderstorms. |
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Area Forecast Discussion National Weather Service New Orleans LA 1104pm CDT Fri July 18 2025 ...New SHORT TER Marine .SHORT TERM... (Saturday through Sunday night) Issued at 1104pm CDT Fri July 18 2025 Saturday looks to be our last day of elevated Probability of Precipitation for the next few days as residual moisture is still available. Coverage will however be more limited than the last few days, scattered at best, with lower PWATs (Precipitable Waters) around 2 inches. Probability of Precipitation peak in the early to mid afternoon hours around 60%. This decrease in thunderstorm coverage does come with an increase in temperatures unfortunately, but still around climate normals for this time of year. Heat indices will also increase, up to the 105F, but will remain below Heat Advisory criteria. Sunday looks to be a different story in terms of Heat Advisory criteria. Heat indices look to be right around or even just above criteria, in the 105-109F range. Surface high pressure begins to build in from the west, bringing drier conditions through the early week. Thunderstorm coverage will be even less on Sunday than Saturday, with PWATs (Precipitable Waters) likely dropping below 2 inches. The NBM seems a little bit hot with the PoPs, so lowered them a touch to ~20-25%. Even just the air temperatures will be back up into the mid 90s for the entire area. Long Term (Sunday through Thursday night) Issued at 1246pm CDT Fri July 18 2025 As ridging builds in from the east Sunday into early next week, precipitable water values fall back into the 1.7 to 1.9 inch range, which is much closer to climatological means for late July. Rain chances in the 20 to 40 percent range may actually be overstating things for Sunday through Tuesday, and it wouldn't be a shock if much of the area remained dry during that period. That's going to allow high temperatures to heat up several degrees into the lower and middle 90s. Looks like we'll have borderline Heat Advisory criteria for portions of the area Sunday afternoon, and more solidly criteria level for Monday and Tuesday. Not quite enough confidence to pull the trigger on an advisory for Sunday yet, but the potential is there. An easterly wave is expected to move through the northern Gulf for Wednesday and Thursday, but some uncertainty as to whether the precipitation shield with that system remains over the Gulf of spreads into portions of the area. That will be the difference between scattered storms and highs around 90, or mostly dry and highs in the mid 90s. Will hang with the NBM numbers for now. Marine Issued at 1104pm CDT Fri July 18 2025 Winds are expected to remain light through the period as high pressure gradually builds in. Additionally convection coverage is expected to continue decreasing into the weekend, with isolated to scattered at best for Saturday and isolated at best beyond that. Moisture returns to the area around mid week, bringing coverage back up. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...None. GM...None. MS...None. GM...None. |
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