Marine Weather and Tide Forecast for Slidell, LA
April 23, 2025 12:39 PM CDT (17:39 UTC) Change Location
 | Sunrise 6:21 AM Sunset 7:33 PM Moonrise 3:43 AM Moonset 3:11 PM |
GMZ534 Lake Borgne- 955 Am Cdt Wed Apr 23 2025
Rest of today - Southeast winds 5 to 10 knots. Waves 1 foot or less, then around 2 feet this afternoon. A slight chance of showers and Thunderstorms.
Tonight - Southeast winds 5 to 10 knots. Waves 1 foot or less. A slight chance of showers and Thunderstorms.
Thursday - Southeast winds 5 to 10 knots. Waves 1 foot or less, then around 2 feet in the afternoon.
Thursday night - Southeast winds 5 to 10 knots. Waves around 2 feet in the evening, then 1 foot or less.
Friday - Southeast winds 5 to 10 knots. Waves around 2 feet.
Friday night - Southeast winds 5 to 10 knots. Waves 1 foot or less.
Saturday - East winds around 5 knots, becoming southeast in the afternoon. Waves 1 foot or less.
Saturday night - South winds 5 to 10 knots, becoming southwest after midnight. Waves 1 foot or less.
Sunday - Northeast winds around 5 knots, becoming southeast in the afternoon. Waves 1 foot or less.
Sunday night - South winds 5 to 10 knots. Waves 1 foot or less.
winds and waves higher in and near Thunderstorms.
winds and waves higher in and near Thunderstorms.
GMZ500 955 Am Cdt Wed Apr 23 2025
Synopsis for pascagoula to atchafalaya river out 60 nm -
onshore flow will primarily be the rule into early next week, although diurnal land breeze and sea breeze cycles are possible along the immediate coast over the weekend. Winds will remain below 15 knots through the weekend outside of Thunderstorms.
onshore flow will primarily be the rule into early next week, although diurnal land breeze and sea breeze cycles are possible along the immediate coast over the weekend. Winds will remain below 15 knots through the weekend outside of Thunderstorms.
7 Day Forecast for Marine Location Near Slidell, LA
NEW! Add second zone forecast
| Tide / Current data from XTide NOT FOR NAVIGATION |
Bayou BonFouca, Route 433, Louisiana, Tide feet
| Tide / Current data from XTide NOT FOR NAVIGATION |
Pearlington, Pearl River, Mississippi, Tide feet
Area Discussion for New Orleans/Baton Rouge, LA
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FXUS64 KLIX 231738 AFDLIX
Area Forecast Discussion National Weather Service New Orleans LA 1238 PM CDT Wed Apr 23 2025
New AVIATION
SHORT TERM
(Today through Thursday)
Issued at 310 AM CDT Wed Apr 23 2025
Shortwave moving eastward across Texas with upper ridging now well off the Florida coast. Some semblance of mid-level ridging to the west of the Texas shortwave. At the surface, the Bermuda high has a westward extension into the eastern Gulf. A stationary boundary was noted near Interstate 40. There is likely an outflow boundary from evening convection near or northwest of Baton Rouge and McComb. Temperatures at 3 AM CDT were mainly in the upper 60s and lower 70s, but ranged from 62 at Trent Lott Airport to 75 at Gulfport and Biloxi, which were being warmed by light southerly winds over waters from Mississippi Sound where water temperatures were in the mid 70s.
The Texas shortwave will move east-northeast across the area today and Thursday, while weakening somewhat. Precipitable water values that were near 1.5 inches last evening will dry out slightly over the next 36 hours to about 1.3 inches. There remains sufficient moisture and instability for the development of scattered thunderstorms, especially during the afternoon hours. The best environment for storms today should be across about the northern half of the area, from about the Interstate 10/12 corridor northward, with the remnant outflow boundary mentioned above as a possible focus for development. On Thursday, as ridging builds into coastal areas, convection may be limited to about the northwest third of the area, such as southwest Mississippi and the adjacent Florida Parishes of southeast Louisiana. Storms will continue to have the potential to produce locally heavy rainfall due to rather slow storm movement.
High temperatures should be primarily in the lower and middle 80s today and Thursday. Not much change in overnight lows, either, but did depart from the NBM numbers somewhat in Jackson County, where the Pascagoula River Basin drainage is producing somewhat cooler conditions than anywhere else.
LONG TERM
(Thursday night through Tuesday)
Issued at 310 AM CDT Wed Apr 23 2025
Ridging is expected to build across the western Gulf and southern Plains Friday and Saturday, and across much of the Mississippi and Ohio River Valleys over the weekend into early next week. This will help the airmass dry out somewhat, with precipitable water values falling off to around 1 inch for Friday through at least Monday before increasing slightly by Tuesday. Any thunderstorm development during that period looks to be isolated in coverage, if any develops at all. High temperatures are likely to be in the mid and upper 80s away from the immediate coast, where sea breezes may cap off heating at midday. Won't rule out a few spots reaching 90, perhaps on Sunday, although the 91 in the MEX numbers at PQL looks a little out of place unless there is an offshore wind.
Little day to day change in overnight lows.
AVIATION
(18Z TAFS)
Issued at 1234 PM CDT Wed Apr 23 2025
Convective activity will be displaced toward BTR and MCB this afternoon as a weak boundary continues to slowly shift further inland. PROB30 wording for the thunderstorm threat is included generally between 18z and 02z at these terminals with prevailing MVFR restrictions. After 02z, the loss of daytime heating should allow the convection to dissipate and a brief period of prevailing VFR conditions will take hold. However, the development of another inversion that will gradually strengthen through the night will allow for another round of low stratus to form between 07z and 12z. This will lead to a mix of IFR and MVFR ceilings ranging from 500 to 1500 feet at all of the terminals. MCB and BTR are expected to see the lowest ceilings and some fog will also form, especially at MCB, between 10z and 14z. After 14z, increased mixing of the boundary layer will allow the inversion to lift and prevailing MVFR and VFR conditions to take hold at all of the terminals by 16z. PG
AVIATION
(12Z TAFS)
Issued at 632 AM CDT Wed Apr 23 2025
IFR or lower conditions at KHUM, KMCB and KBTR are expected to improve quickly around 14z to MVFR and then VFR by midday.
Scattered TSRA could impact KBTR, KMCB, KHDC, KASD and KHUM this afternoon, and have used PROB30 for those. Threat is non-zero elsewhere, but too low to carry in the TAF. IFR conditions will again be possible around sunrise Thursday, but threat not quite as high as this morning.
MARINE
Issued at 310 AM CDT Wed Apr 23 2025
Aside from the potential for thunderstorms over the protected waters during the next 36 hours or so, favorable conditions for maritime operations are expected. Onshore flow is likely to continue through the period with wind speeds for the most part remaining near 10 knots or less.
PRELIMINARY POINT TEMPS/POPS
MCB 65 84 65 86 / 40 10 0 30 BTR 67 86 67 87 / 40 10 0 30 ASD 67 84 67 86 / 30 10 0 10 MSY 70 84 70 86 / 30 10 0 10 GPT 68 81 68 82 / 20 10 0 10 PQL 65 83 65 84 / 10 10 0 10
LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.
Area Forecast Discussion National Weather Service New Orleans LA 1238 PM CDT Wed Apr 23 2025
New AVIATION
SHORT TERM
(Today through Thursday)
Issued at 310 AM CDT Wed Apr 23 2025
Shortwave moving eastward across Texas with upper ridging now well off the Florida coast. Some semblance of mid-level ridging to the west of the Texas shortwave. At the surface, the Bermuda high has a westward extension into the eastern Gulf. A stationary boundary was noted near Interstate 40. There is likely an outflow boundary from evening convection near or northwest of Baton Rouge and McComb. Temperatures at 3 AM CDT were mainly in the upper 60s and lower 70s, but ranged from 62 at Trent Lott Airport to 75 at Gulfport and Biloxi, which were being warmed by light southerly winds over waters from Mississippi Sound where water temperatures were in the mid 70s.
The Texas shortwave will move east-northeast across the area today and Thursday, while weakening somewhat. Precipitable water values that were near 1.5 inches last evening will dry out slightly over the next 36 hours to about 1.3 inches. There remains sufficient moisture and instability for the development of scattered thunderstorms, especially during the afternoon hours. The best environment for storms today should be across about the northern half of the area, from about the Interstate 10/12 corridor northward, with the remnant outflow boundary mentioned above as a possible focus for development. On Thursday, as ridging builds into coastal areas, convection may be limited to about the northwest third of the area, such as southwest Mississippi and the adjacent Florida Parishes of southeast Louisiana. Storms will continue to have the potential to produce locally heavy rainfall due to rather slow storm movement.
High temperatures should be primarily in the lower and middle 80s today and Thursday. Not much change in overnight lows, either, but did depart from the NBM numbers somewhat in Jackson County, where the Pascagoula River Basin drainage is producing somewhat cooler conditions than anywhere else.
LONG TERM
(Thursday night through Tuesday)
Issued at 310 AM CDT Wed Apr 23 2025
Ridging is expected to build across the western Gulf and southern Plains Friday and Saturday, and across much of the Mississippi and Ohio River Valleys over the weekend into early next week. This will help the airmass dry out somewhat, with precipitable water values falling off to around 1 inch for Friday through at least Monday before increasing slightly by Tuesday. Any thunderstorm development during that period looks to be isolated in coverage, if any develops at all. High temperatures are likely to be in the mid and upper 80s away from the immediate coast, where sea breezes may cap off heating at midday. Won't rule out a few spots reaching 90, perhaps on Sunday, although the 91 in the MEX numbers at PQL looks a little out of place unless there is an offshore wind.
Little day to day change in overnight lows.
AVIATION
(18Z TAFS)
Issued at 1234 PM CDT Wed Apr 23 2025
Convective activity will be displaced toward BTR and MCB this afternoon as a weak boundary continues to slowly shift further inland. PROB30 wording for the thunderstorm threat is included generally between 18z and 02z at these terminals with prevailing MVFR restrictions. After 02z, the loss of daytime heating should allow the convection to dissipate and a brief period of prevailing VFR conditions will take hold. However, the development of another inversion that will gradually strengthen through the night will allow for another round of low stratus to form between 07z and 12z. This will lead to a mix of IFR and MVFR ceilings ranging from 500 to 1500 feet at all of the terminals. MCB and BTR are expected to see the lowest ceilings and some fog will also form, especially at MCB, between 10z and 14z. After 14z, increased mixing of the boundary layer will allow the inversion to lift and prevailing MVFR and VFR conditions to take hold at all of the terminals by 16z. PG
AVIATION
(12Z TAFS)
Issued at 632 AM CDT Wed Apr 23 2025
IFR or lower conditions at KHUM, KMCB and KBTR are expected to improve quickly around 14z to MVFR and then VFR by midday.
Scattered TSRA could impact KBTR, KMCB, KHDC, KASD and KHUM this afternoon, and have used PROB30 for those. Threat is non-zero elsewhere, but too low to carry in the TAF. IFR conditions will again be possible around sunrise Thursday, but threat not quite as high as this morning.
MARINE
Issued at 310 AM CDT Wed Apr 23 2025
Aside from the potential for thunderstorms over the protected waters during the next 36 hours or so, favorable conditions for maritime operations are expected. Onshore flow is likely to continue through the period with wind speeds for the most part remaining near 10 knots or less.
PRELIMINARY POINT TEMPS/POPS
MCB 65 84 65 86 / 40 10 0 30 BTR 67 86 67 87 / 40 10 0 30 ASD 67 84 67 86 / 30 10 0 10 MSY 70 84 70 86 / 30 10 0 10 GPT 68 81 68 82 / 20 10 0 10 PQL 65 83 65 84 / 10 10 0 10
LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| NWCL1 - 8761927 - New Canal, LA | 24 mi | 51 min | S 2.9G | 30.11 | ||||
| WYCM6 - 8747437 - Bay Waveland Yacht Club, MS | 25 mi | 51 min | SSE 11G | 76°F | 30.09 | |||
| SHBL1 - 8761305 - Shell Beach, LA | 28 mi | 51 min | SSE 11G | 68°F | 30.12 | |||
| CARL1 | 30 mi | 51 min | 67°F | |||||
| BYGL1 - 8762482 - Bayou Gauche, LA | 47 mi | 51 min | 77°F | 30.10 |
Wind History for New Canal Station, LA
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Link to 1 hour of 5 minute data for KASD
Terminal Aerodrome Forecast (TAF) for KASD
Wind History Graph: ASD
(wind in knots)
GEOS Local Image of Southeast
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New Orleans/Baton Rouge, LA,
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