Grand Isle, LA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Grand Isle, LA

May 19, 2024 6:17 PM CDT (23:17 UTC) Change Location
Sunrise 6:03 AM   Sunset 7:50 PM
Moonrise 3:28 PM   Moonset 2:41 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
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GMZ552 Expires:202405200830;;497623 Fzus54 Klix 192001 Cwflix
coastal waters forecast national weather service new orleans la 301 pm cdt Sun may 19 2024
pascagoula to atchafalaya river out to 60 nm
seas are provided as a range of the average height of the highest 1/3 of the waves - .along with the occasional height of the average highest 10 percent of the waves.
gmz550-552-200830- coastal waters from port fourchon la to lower atchafalaya river la out 20 nm- coastal waters from the southwest pass of the mississippi river to port fourchon louisiana out 20 nm- 301 pm cdt Sun may 19 2024

Tonight - Southeast winds around 5 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 7 seconds.

Monday - East winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 7 seconds.

Monday night - Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 6 seconds.

Tuesday - Southeast winds around 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds.

Tuesday night - Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 5 seconds.

Wednesday - Southeast winds around 10 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 5 seconds.

Wednesday night - Southeast winds around 10 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 4 seconds.

Thursday - Southeast winds around 10 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 5 seconds.

Thursday night - Southeast winds around 10 knots. Seas 1 to 2 feet.

Friday - South winds around 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 5 seconds.

Friday night - South winds around 10 knots. Seas 1 to 2 feet.

GMZ500 301 Pm Cdt Sun May 19 2024

Synopsis for pascagoula to atchafalaya river out 60 nm -
high pressure continues to build into the area allowing for mostly benign marine conditions to start the new workweek. Return flow will spread across the northern gulf of mexico early to midweek and remain in place through the end of the week. Winds are forecast to stay at or below 15kts.


7 Day Forecast for Marine Location Near Grand Isle, LA
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Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 192040 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 340 PM CDT Sun May 19 2024

NEW SHORT TERM, LONG TERM, MARINE

SHORT TERM
(This evening through Monday night)
Issued at 305 PM CDT Sun May 19 2024

Generally a quite pattern has evolved for our local CWFA. Aloft, a dry northwesterly flow around the eastern periphery of a 594dam high over Mexico will remain across our region through the short term period. At the surface a high pressure will continue to rule the overall surface pattern with light and variable winds. Skies should remain on the clear side. This could again generate some shallow radiation fog tonight with calm winds and clear skies.
SREF guidance is pinging the best potential along the Atchafalaya late tonight or around sunrise on Monday. Kept patchy fog in the grids for now. This should lift pretty rapidly after sunrise. The main story here will be temperatures. As high pressure begins to move east a weak onshore flow will initiate allowing temperatures to be slightly cooler right along the immediate coast...at least cooler than today with a weak northerly flow over our region limiting impacts from the cooler shelf waters. (Frye)

LONG TERM
(Tuesday through Saturday night)
Issued at 305 PM CDT Sun May 19 2024

Tuesday the southerly return flow will be more noticeable. Again, this should moderate temperatures right along the immediate coast with the interaction of the cooler SSTs. However, inland will be a few degrees warmer with most locations ending up in the upper 80s or even perhaps lower 90s. Aloft, the upper ridge mentioned in the short term portion will spread northeast toward the Rio Grande Valley. There will be upper level ridging along the Texas coast and spreading into our region, however, the heights are just a bit lower than previously advertised so temps were knocked down a degree or two from previous higher forecasts. That said, it will still be a warm week ahead with temperatures warming into the middle and upper 80s each day with perhaps the warmer locations such as Baton Rouge reaching the 90F mark each afternoon.

By Thursday a weak frontal boundary tries to move southward but stalls to our north across the midsouth region. There will be an upper level impulse overhead and with a more rich boundary layer from a few days of return flow. Think the rain chances will be nonzero, especially across interior southwest MS closer to the front and best upper level dynamics. But largely most of the region appears to be dry with the best QPF signal along and north of the I20 corridor. Going into late week and into the weekend a warming trend is progged by the guidance as upper level heights again try to increase with the upper high strengthening to around 595dam over Deep South Texas. If this does, indeed, occur many across our forecast area will see their warmest temperatures of the season late this week and especially into the next weekend.
(Frye)

AVIATION
(18Z TAFS)
Issued at 1224 PM CDT Sun May 19 2024

Mostly VFR conditions through this cycle. Perhaps MVFR VIS overnight for the fog favored terminals such as MCB and HUM.
Otherwise, light and variable winds expected. (Frye)

MARINE
Issued at 305 PM CDT Sun May 19 2024

High pressure will continue to build into the region early this week. This will lead to favorable marine conditions through the forecast period. High pressure will begin to exit the region allowing for southerly winds to take shape, but winds should remain at and mostly below 15kts through the week. (Frye)

PRELIMINARY POINT TEMPS/POPS
MCB 65 90 66 89 / 0 0 0 0 BTR 70 92 70 93 / 0 0 0 0 ASD 69 91 70 90 / 0 0 0 0 MSY 73 89 72 89 / 0 0 0 0 GPT 69 87 70 87 / 0 0 0 0 PQL 67 90 68 89 / 0 0 0 0

LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...None.
MS...None.
GM...None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi47 min ESE 6G8.9 80°F29.89
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi66 min ESE 8G8.9 78°F 2 ft29.8974°F
42084 26 mi47 min 80°F 82°F3 ft
BURL1 - Southwest Pass, LA 39 mi77 min 11G11
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi47 min E 8.9G11 75°F29.89
PILL1 42 mi47 min E 6G8 74°F29.90
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi47 min 83°F29.89


Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KGAO SOUTH LAFOURCHE LEONARD MILLER JR,LA 20 sm22 minSE 0410 smClear84°F72°F66%29.88
Link to 5 minute data for KXPY


Wind History from XPY
(wind in knots)
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Tide / Current for Caminada Pass (bridge), Mississippi River Delta, Louisiana
   
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Caminada Pass (bridge)
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Sun -- 03:41 AM CDT     Moonset
Sun -- 06:05 AM CDT     Sunrise
Sun -- 10:05 AM CDT     0.65 feet High Tide
Sun -- 04:27 PM CDT     Moonrise
Sun -- 07:47 PM CDT     Sunset
Sun -- 07:58 PM CDT     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Caminada Pass (bridge), Mississippi River Delta, Louisiana, Tide feet
12
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0.4
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11
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Tide / Current for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
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Sun -- 03:41 AM CDT     Moonset
Sun -- 06:05 AM CDT     Sunrise
Sun -- 08:42 AM CDT     0.84 feet High Tide
Sun -- 04:27 PM CDT     Moonrise
Sun -- 06:58 PM CDT     0.28 feet Low Tide
Sun -- 07:47 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana, Tide feet
12
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0.5
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0.6
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0.7
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0.8
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11
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0.7
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0.6
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Weather Map
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GEOS Local Image of Southern Mississippi Valley   
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New Orleans/Baton Rouge, LA,




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