Boothville, LA to Southwest Pass of the Mississippi River Marine Forecast
| Today...Southeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: Southeast 2 Feet At 7 Seconds. |
| Tonight...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Friday...Southeast Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Friday Night...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: Southeast 2 Feet At 6 Seconds. |
| Saturday...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 5 Seconds. |
| Saturday Night...South Winds 5 To 10 Knots, Becoming West 10 To 15 Knots With Gusts Up To 20 Knots After Midnight. Seas Around 2 Feet. Wave Detail: West 2 Feet At 4 Seconds And Southeast 1 Foot At 5 Seconds. A Slight Chance Of Showers And Thunderstorms After Midnight. |
| Sunday...North Winds 15 To 20 Knots, Becoming Northeast 20 To 25 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 5 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, Building To 5 To 7 Feet, Occasionally To 9 Feet After Midnight. Wave Detail: Northeast 5 Feet At 5 Seconds, Becoming Northeast 7 Feet At 6 Seconds. |
| Monday...Northeast Winds 20 To 25 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: Northeast 7 Feet At 7 Seconds. |
| Monday Night...East Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: East 6 Feet At 8 Seconds. Winds And Seas Higher In And Near Thunderstorms. |
| Area Forecast Discussion ...UPDATED National Weather Service New Orleans LA 626pm CDT Fri August 21 2026 .SHORT TERM... (Now through Monday night) Issued at 1224pm CDT Fri August 21 2026 Tonight through the weekend, upper level ridging will remain in place over the area. Southerly surface winds will continue to help advect warm air and moisture into the area, increasing the humidity. Scattered showers and storms will be expected daily during the afternoon and early evening. These storms will have the potential for frequent lightning and gusty subsevere winds (40- 50mph). These storms are not expected to be severe. The heat continues. Highs in the mid to upper 90s combined with heat index values in the 103-110 degrees range will be quite warm. Heat advisories are in effect for Saturday and will likely be needed Sunday. Be sure to stay hydrated and take frequent breaks if you will be spending time outdoors. MSW Long Term (Tuesday through Thursday night) Issued at 1224pm CDT Fri August 21 2026 High pressure continues to build over the area for the workweek. Southerly surface winds will continue to advect warm and moist air into the region, increasing humidities for the area. Conditions will be quite dry overall for the beginning of next week with Probability of Precipitation less than 10-20% for the long term forecast. An isolated shower/storm will be possible daily during peak heating hours in the afternoon/evening. The main risk with these storms where they occur would be frequent lightning and gusty winds (30-50mph). The heat will continue as well with highs in the mid to upper 90s and heat index values in the 105-110 degree range. So, be sure to stay hydrated and take frequent breaks if spending time outdoors. MSW Marine Issued at 1224pm CDT Fri August 21 2026 Surface high pressure centered over the central Gulf will maintain a generally weak pressure gradient through much of the period. A predominantly westerly flow will continue, with higher winds during the early morning and late night hours. Isolated to scattered thunderstorms will remain possible with winds and waves higher in and near this activity. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA...Extreme Heat Warning until 8pm CDT this evening for LAZ034>037- 039-046>048-056>058-064-070-071-076>087-089>100. Heat Advisory from 11am to 8pm CDT Saturday for LAZ034>037-039- 046>048-056>058-064-070-071-076>087-089>100. GM...None. MS...Extreme Heat Warning until 8pm CDT this evening for MSZ068>071- 077-083>088. Heat Advisory from 11am to 8pm CDT Saturday for MSZ068>071-077- 083>088. GM...None. |
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