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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:34AM | Sunset 7:36PM | Friday August 23, 2019 5:56 AM CDT (10:56 UTC) | Moonrise 11:38PM | Moonset 12:36PM | Illumination 46% |  |
GMZ550 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- 411 Am Cdt Fri Aug 23 2019
Today..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 6 seconds. Showers likely in the morning. Chance of Thunderstorms through the day. Chance of showers in the afternoon.
Tonight..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Saturday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Saturday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Sunday night..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers in the evening. Chance of Thunderstorms through the night. Showers likely after midnight.
Monday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Monday night..South winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Chance of showers and Thunderstorms after midnight.
Today..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 6 seconds. Showers likely in the morning. Chance of Thunderstorms through the day. Chance of showers in the afternoon.
Tonight..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Saturday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Saturday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Sunday night..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers in the evening. Chance of Thunderstorms through the night. Showers likely after midnight.
Monday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Monday night..South winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Chance of showers and Thunderstorms after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 411 Am Cdt Fri Aug 23 2019
Synopsis..Weak extension of bermuda high pressure area across the northeast gulf of mexico will persist through the weekend. An unsettled pattern will provide periods of Thunderstorms over the coastal waters through Tuesday.
Synopsis..Weak extension of bermuda high pressure area across the northeast gulf of mexico will persist through the weekend. An unsettled pattern will provide periods of Thunderstorms over the coastal waters through Tuesday.
7 Day Forecast for Marine Location Near Golden Meadow, LA
Hourly EDIT Helplocation: 29.13, -90.42 debug
Area Discussion for - New Orleans/Baton Rouge, LA
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus64 klix 230951 afdlix area forecast discussion national weather service new orleans la 451 am cdt Fri aug 23 2019 Short term (today through Sunday) Infrared satellite imagery shows a broad mid level low over the west to northwest gulf of mexico that is moving north. This has already brought a surge of deep tropical moisture into southeast louisiana and south mississippi with precipitable water (pw) values running high in the 2 to 2.25 inch range. The models remain in decent agreement taking this low trough north today across the northwest gulf towards the mouth of the sabine river tonight and Saturday. This will maintain the deep tropical moisture over the forecast area today, so have maintained the high rain chances from the previous forecast, especially given the fact that there is so much scattered shower activity already during the overnight to early morning hours. While the rain chances are high, most locations should see rainfall amounts in the half inch to one inch range today since the showers and thunderstorms should be moving at a decent pace. The weather prediction center has mainly coastal areas of louisiana in a marginal risk of excessive rainfall today where more repetitive convection could occur. With much less sunshine expected today, most locations should see high temperatures staying below 90 degrees. Most of the rain should diminish this evening but then redevelop again offshore overnight and impact at least southwest portions of the area around south central louisiana. On Saturday, deep tropical moisture will persist and support high rain chances again along with locally heavy rainfall. The heaviest rainfall amounts are expected along the southwest and south central louisiana coastline where there is a slight risk of excessive rainfall, and the marginal risk extends across most inland portions of south louisiana. At this time, a flash flood watch is not warranted, however that could change if rainfall amounts exceed what is expected. A potent shortwave trough will be moving southeast from the central and southern plains into the lower mississippi valley Sunday. This will help pick up and phase in the mid level trough over the western gulf coast region and pull it east across south louisiana. Once again, this will maintain deep tropical moisture and a favorable environment for fairly widespread rainfall and a threat of locally very heavy downpours from heavier showers and thunderstorms. The entire forecast area is in a marginal risk of excessive rainfall on Sunday and Sunday night. At this time, the average rainfall amounts for the three days today through Sunday night are mostly in the 1 to 2 inch range, however this pattern will likely support some higher totals in the 3 to 5 inch range, particularly south of i-10 in louisiana. Long term (Monday through Thursday) This system should finally start to exit the region on Monday as the mid level trough moves east, however there will still be deep tropical moisture over the region to support scattered to numerous showers and thunderstorms. In fact, it should remain a fairly wet pattern Tuesday into Wednesday as a frontal boundary will start to approach the region from the north as a fairly potent series of shortwave troughs carve out a broader mid upper level trough across the upper to mid mississippi valley and great lakes region. The ecmwf is stronger pushing the cold front through the forecast area on Thursday and Thursday night while the GFS keeps the boundary mostly north of the forecast area. Have indicated a bit of a drying trend for Thursday, but confidence is low at this time. 22 td |
Aviation All terminals currentlyVFR. Radar is showing an area of showers moving onshore between kbve and khum. If they hold together, likely to reach knew and kmsy prior to 10z. Have already added early morning vcts to those, and may need to do the same for khdc and kasd. Likely to see MVFR ceilings and ifr visibilities with these showers storms. Should see more daytime areal coverage of shra tsra than yesterday, with significant areal coverage during the afternoon hours. Will carry prevailing shra beyond 17-18z with vcts. Expect a diminishing trend around 00z, with the cycle likely to repeat 24 hours from now. 35 Marine No significant issues with prevailing light onshore winds and low seas outside of convection, which is blossoming this morning. The air mass will become increasingly more conducive for tropical funnel and waterspout formation in the near shore waters, near shore marshes and tidal lakes bays through at least the weekend. 24 35 Decision support Dss code: yellow. Deployed: none. Activation: none. Activities: marginal risk excessive rainfall today Sunday. Marginal to slight risk Saturday. Decision support services (dss) code legend green = no weather impacts that require action. Blue = long-fused watch, warning, or advisory in effect or high visibility event; marginal risk severe or excessive rain. Yellow = heightened impacts with short-fused watch, warning or advisory issuances; radar support for slight risk severe or excessive rain. Orange = high impacts; enhanced risk severe; nearby tropical events; hazmat or other large episodes. Red = full engagement for moderate to high risk of severe and or excessive rainfall, or direct tropical threats; events of national significance. Preliminary point temps pops Mcb 88 71 89 71 60 20 70 30 btr 87 74 88 74 70 20 70 30 asd 89 73 90 73 60 20 60 20 msy 88 77 89 76 70 20 60 30 gpt 86 74 88 74 60 20 50 40 pql 89 73 91 73 60 30 50 40 Lix watches warnings advisories La... None. Gm... None. Ms... None. Gm... None. |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| KXPY | 12 mi | 22 min | SSW 5.1 | 82°F | 77°F | |||
| SPLL1 - South Timbalier Block 52, LA / CSI06 | 18 mi | 117 min | S 9.9 G 11 | 85°F | ||||
| GISL1 - 8761724 - Grand Isle, LA | 26 mi | 57 min | SSW 4.1 G 6 | 85°F | ||||
| LOPL1 - Louisiana Offshore Oil Port, LA | 27 mi | 35 min | 8 G 11 | 83°F | 2 ft | 1016.1 hPa | 73°F | |
| BYGL1 - 8762482 - Bayou Gauche, LA | 46 mi | 63 min | SSE 1.9 G 1.9 | 78°F | 85°F | 1015 hPa | ||
| KMDJ | 47 mi | 22 min | SW 6 | 84°F | 75°F |
Wind History for Grand Isle, LA
(wind in knots) EDIT (on/off) Help| 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | |
| Last 24hr | SE | SE | SE | SE G7 | SE | SE | E G8 | E G9 | SE | SE G7 | S | E | SE G10 | SE G8 | SE G7 | S G13 | S G13 | S G12 | S G7 | S | S | S G16 | S G9 | SW |
| 1 day ago | S | S | S | SE | SE | SE G7 | SE G8 | SE G8 | SE G6 | E | SE | SE | SE | SE | SE G6 | SE | SE | SE G8 | SE G9 | SE G10 | SE G8 | SE G7 | S | S |
| 2 days ago | N | E | N G13 | SW | S | S | NE | S G10 | SW G19 | SW G14 | S G11 | SW G12 | SW G10 | SW G8 | S | SW | S G7 | S | S | S | S | S | SW | S |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Port Fourchon, LA | 12 mi | 82 min | S 4 | 10.00 mi | Mostly Cloudy | 82°F | 78°F | 89% | 1015.2 hPa |
| Galliano, South Lafourche Airport, LA | 23 mi | 82 min | N 0 | 10.00 mi | Mostly Cloudy | 0°F | 0°F | % | 1014.9 hPa |
Link to 5 minute data for KXPY
Wind History from XPY (wind in knots)
| 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | |
| Last 24hr | E | SE | S | SE | SE | SW | Calm | SE | SE G13 | SE | S | SE G13 | S | S G15 | S | S | S | S | S | S | SW | S | ||
| 1 day ago | S | Calm | S | S | S | SE G11 | SE | E | SE | SE | SE | SE | SE | SE | SE | SE | SE G12 | S | SE | Calm | Calm | SE | ||
| 2 days ago | E | Calm | N | W G14 | E | S | SW G21 | SW | SW | SW | S | S | SW | S | S | S | S | S | S | S | Calm | Calm | S |
Tide / Current Tables for Pelican Islands, Timbalier Bay, Mississippi River Delta, Louisiana
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPelican Islands
Click for Map
Fri -- 05:54 AM CDT 1.24 feet High Tide
Fri -- 06:34 AM CDT Sunrise
Fri -- 09:58 AM CDT Last Quarter
Fri -- 01:36 PM CDT Moonset
Fri -- 05:51 PM CDT 0.36 feet Low Tide
Fri -- 07:33 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 05:54 AM CDT 1.24 feet High Tide
Fri -- 06:34 AM CDT Sunrise
Fri -- 09:58 AM CDT Last Quarter
Fri -- 01:36 PM CDT Moonset
Fri -- 05:51 PM CDT 0.36 feet Low Tide
Fri -- 07:33 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 0.9 | 1 | 1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1 | 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.6 | 0.7 |
Tide / Current Tables for Timbalier Island, Timbalier Bay, Mississippi River Delta, Louisiana
EDIT (on/off) Help One Week of DataTimbalier Island
Click for Map
Fri -- 03:47 AM CDT 1.27 feet High Tide
Fri -- 06:35 AM CDT Sunrise
Fri -- 09:58 AM CDT Last Quarter
Fri -- 01:37 PM CDT Moonset
Fri -- 03:48 PM CDT 0.36 feet Low Tide
Fri -- 07:34 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 03:47 AM CDT 1.27 feet High Tide
Fri -- 06:35 AM CDT Sunrise
Fri -- 09:58 AM CDT Last Quarter
Fri -- 01:37 PM CDT Moonset
Fri -- 03:48 PM CDT 0.36 feet Low Tide
Fri -- 07:34 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
| 12 am | 1 am | 2 am | 3 am | 4 am | 5 am | 6 am | 7 am | 8 am | 9 am | 10 am | 11 am | 12 pm | 1 pm | 2 pm | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 1.1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.2 | 1.2 | 1.1 | 1 | 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 1 |
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES 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
Wind Forecast for New Orleans/Baton Rouge, LA (6,6,7,8)
(on/off) Help
Ground Weather Radar Station New Orleans/Baton Rouge, LA
(on/off) Help
Gulf Stream Current
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Disclaimer: 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 numerious 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. |