Sunday, January17, 2021
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Marine Weather and Tides
Grand Isle, LA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:54AMSunset 5:26PM Sunday January 17, 2021 3:40 AM CST (09:40 UTC) Moonrise 10:09AMMoonset 9:59PM Illumination 16% Phase: Waxing Crescent; Moon at 4 days in cycle
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:202101171515;;034028 Fzus54 Klix 170236 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 836 Pm Cst Sat Jan 16 2021 Pascagoula To Atchafalaya River Out To 60 Mile 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 Ten Percent Of The Waves. Gmz550-552-171515- 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 Mile- 836 Pm Cst Sat Jan 16 2021
Rest of tonight..Northwest winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 4 seconds.
Sunday..West winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Sunday night..Northwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Monday..North winds 10 to 15 knots becoming east 5 to 10 knots in the afternoon. Seas 2 to 4 feet. Dominant period 4 seconds.
Monday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Tuesday..East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Tuesday night..East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds.
Wednesday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet.
Wednesday night..South winds 10 to 15 knots. Seas 3 to 5 feet.
Thursday..South winds 10 to 15 knots. Seas 2 to 4 feet. Slight chance of showers in the afternoon.
Thursday night..Southwest winds 10 to 15 knots. Seas 2 to 4 feet. Slight chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 836 Pm Cst Sat Jan 16 2021
Synopsis..High pressure will remain over the waters through tonight. Another cold front will sweep across the area tomorrow and high pressure will build back in for Monday and Tuesday. The high will shift toward the eastern gulf by Wednesday.


7 Day Forecast for Marine Location Near Grand Isle, LA
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location: 29.2, -90.05     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 170932 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 332 AM CST Sun Jan 17 2021

SHORT TERM. Some light freezing temps during the next few nights mainly for the most northern portion of the area. A slow warming trend will begin Tuesday.

LONG TERM (Wednesday through Saturday). Zonal upper level flow pattern and weak ridging will set up over the area Wednesday through Friday morning. Southerly surface winds these days will help to bring warm and moist air into the region. Weak upper level divergence will help to introduce some instability and lifting into the atmosphere, as well. As a result, temperatures are expected to be closer to normal later in the week with drier weather conditions.

Friday into Saturday, a weak shortwave upper level trough is expected to move through the Western US and then get wrapped up in an upper level zonal flow pattern by the time it reaches our area. As the remnants of this shortwave influence the zonal flow slightly, it will help enhance the potential for some rain in our area Friday night into Saturday morning, especially with the help of the warm and moist air that would already be in place over the area. This rainfall would likely be light or moderate and lightning potential would be low, based on the models currently. The potnetial for rain is highly dependent upon how these flow patterns develop over the next week.

Saturday evening and beyond, weak upper level ridging and zonal flow sets up again over our area with some drier conditions and more normal temperatures expected. MSW

AVIATION.

VFR conditions through this taf cycle.

MARINE.

Winds have eased quite a bit over the past 12 hours. The wind field will remain light with winds of less than 10 knots as high pressure continues to settle directly over the waters. Seas have subsided to around 2 to 3 feet in response to the lighter winds. Another front will push through on Sunday, and this will allow winds to increase to 10 to 15 knots for Sunday night and Monday. Return flow will begin to develop Monday night into Tuesday but should remain around 10kt then rise toward the end of the upcoming week.

PRELIMINARY POINT TEMPS/POPS. MCB 60 33 61 38 / 0 0 0 0 BTR 62 35 62 41 / 0 0 0 0 ASD 60 34 61 39 / 0 0 0 0 MSY 60 40 61 45 / 0 0 0 0 GPT 59 36 60 40 / 0 0 0 0 PQL 59 34 60 38 / 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 WavesPressureDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi52 min 8 G 8.9 57°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi41 min NW 9.9 G 17 51°F 2 ft1018.1 hPa33°F
BURL1 - Southwest Pass, LA 39 mi40 min 11 G 12
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi52 min N 11 G 12
KMDJ 41 mi25 min NW 8.9 54°F 39°F
PILL1 42 mi52 min N 5.1 G 7 44°F 44°F1017.6 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi52 min WSW 1.9 G 4.1 40°F 49°F1018.4 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA20 mi45 minN 07.00 miFair34°F33°F94%1018.3 hPa

Link to 5 minute data for KXPY

Wind History from XPY (wind in knots)
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Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Caminada Pass (bridge)
Click for Map
Sun -- 01:35 AM CST     0.62 feet High Tide
Sun -- 06:54 AM CST     Sunrise
Sun -- 10:08 AM CST     Moonrise
Sun -- 12:28 PM CST     -0.13 feet Low Tide
Sun -- 05:26 PM CST     Sunset
Sun -- 09:58 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Sun -- 12:35 AM CST     0.58 feet High Tide
Sun -- 06:54 AM CST     Sunrise
Sun -- 10:08 AM CST     Moonrise
Sun -- 11:17 AM CST     -0.25 feet Low Tide
Sun -- 05:25 PM CST     Sunset
Sun -- 09:58 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station



Gulf Stream Current



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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.