Saturday, August15, 2020
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Marine Weather and Tides
Golden Meadow, LA

Version 3.4
NOTICE
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 6:30AMSunset 7:44PM Saturday August 15, 2020 11:27 AM CDT (16:27 UTC) Moonrise 1:48AMMoonset 4:14PM Illumination 11% Phase: Waning Crescent; Moon at 26 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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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- 1023 Am Cdt Sat Aug 15 2020
Rest of today..West winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tonight..Northwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms early in the evening. Slight chance of showers and Thunderstorms after midnight.
Sunday..Northwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
Sunday night..Northwest winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds.
Monday..Northwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms through the day.
Monday night..Northwest winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers through the night. Slight chance of Thunderstorms after midnight.
Tuesday..Northwest winds 5 to 10 knots becoming southwest late in the afternoon. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms through the day.
Tuesday night..Southwest winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms through the night.
Wednesday..Northwest winds 5 to 10 knots becoming south in the afternoon. Seas 1 foot or less. Chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots. Seas 1 foot or less. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1023 Am Cdt Sat Aug 15 2020
Synopsis..Weak high pressure will prevail across the northeastern gulf of mexico today. A weak frontal boundary will stall as it moves into coastal waters. A weak surface low will track from east to west along the gulf coast from florida to texas.


7 Day Forecast for Marine Location Near Golden Meadow, LA
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location: 29.13, -90.42     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 150852 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 352 AM CDT Sat Aug 15 2020

SYNOPSIS.

Weak upper trough remains across the area with a rather wet airmass. Precipitable water on the 00z LIX sounding was at 2.17 inches. The tail of a weak shortwave over Alabama was triggering isolated convection from Natchez southeastward to Mobile, clipping the northern counties of our area. In addition, a few showers/storms over the lower portions of the Louisiana coastal parishes. Early morning temperatures generally in the mid and upper 70s across the area.

SHORT TERM.

Earlier forecast expectations remain reasonable. Scattered convection this morning across the area, then as low level winds become more northwesterly during the day, the column begins to dry out. By 00z this evening, GFSBufr sounding for New Orleans shows precipitable water values dropping from the aforementioned 2+ inches to 1.6 inches. Beyond tonight, moisture levels remain unseasonably low into the early part of the workweek, generally well below 1.5 inches. Expect at that point, little or no convection should develop over land on Sunday. Any convection Monday will be very isolated and limited to sea breeze boundaries. Very tempted to go with a completely dry forecast beyond this afternoon through Monday.

Will continue forecast trends of high temperatures at the upper end of the guidance envelope. One thing to watch for on Sunday, and probably Monday, is if north winds are strong enough, say near 10 mph, to cancel out the sea breeze, high temperatures could get above forecast expectations along the Mississippi coast and north of Interstate 12.

LONG TERM.

Low level winds remain offshore through at least Wednesday, and even after that, moisture levels as measured by precipitable water values doesn't return to 1.75 inches until Thursday night or Friday. Don't see any indications of any organized convective threat through the end of the week, but as moisture levels slowly increase, could see a little more convection near lake/sea breeze boundaries during the afternoon hours. Will continue trend of using the upper end of the guidance envelope for high temperature forecasts.

AVIATION.

Seeing a few MVFR ceilings this morning at KASD and KHUM. Can't rule out a convective threat at KMCB and KGPT prior to the 12z forecast issuance, and will handle those with amendments if necessary. HRRR/RAP solutions don't really pick up on much in the way of TSRA until well beyond 18z, closer to 20-21z, so may push back initiation of VCTS a couple of hours to fit this. Once convective threat diminishes beyond sunset, don't expect much in the way of flight restrictions the rest of the weekend.

MARINE.

Outside of the threat of thunderstorms, particularly today, no marine issues anticipated. Winds should remain below 15 knots outside of thunderstorms through the period.

PRELIMINARY POINT TEMPS/POPS. MCB 92 74 94 73 / 30 0 10 0 BTR 94 75 97 75 / 30 0 10 10 ASD 93 74 97 74 / 30 10 10 0 MSY 93 78 95 79 / 30 10 10 10 GPT 91 76 94 76 / 40 10 10 10 PQL 93 74 97 74 / 40 10 10 10

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
KXPY 12 mi27 min NW 9.9 90°F 75°F
GISL1 - 8761724 - Grand Isle, LA 26 mi57 min 89°F
BYGL1 - 8762482 - Bayou Gauche, LA 46 mi57 min 87°F 86°F1015.1 hPa
KDLP 46 mi32 min NW 7 G 13 86°F 75°F
KMDJ 47 mi32 min NW 7 86°F 79°F

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA12 mi27 minNW 1010.00 mi90°F75°F63%1015.2 hPa
Galliano, South Lafourche Airport, LA23 mi50 minWNW 410.00 miMostly Cloudy88°F77°F70%1015.2 hPa

Link to 5 minute data for KXPY

Wind History from XPY (wind in knots)
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1 day agoCalmSE3SW6S8S5E8CalmCalmCalmS4CalmCalmSW6SW4SW3SW5SW7SW5NW4CalmSW7CalmW8SW8
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Tide / Current Tables for Pelican Islands, Timbalier Bay, Mississippi River Delta, Louisiana
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Pelican Islands
Click for Map
Sat -- 02:47 AM CDT     Moonrise
Sat -- 06:30 AM CDT     Sunrise
Sat -- 09:13 AM CDT     1.55 feet High Tide
Sat -- 05:13 PM CDT     Moonset
Sat -- 07:41 PM CDT     Sunset
Sat -- 09:13 PM CDT     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.70.811.11.31.41.51.61.51.51.41.210.80.60.40.30.10.1000.1

Tide / Current Tables for Timbalier Island, Timbalier Bay, Mississippi River Delta, Louisiana
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Timbalier Island
Click for Map
Sat -- 02:47 AM CDT     Moonrise
Sat -- 06:31 AM CDT     Sunrise
Sat -- 07:06 AM CDT     1.59 feet High Tide
Sat -- 05:14 PM CDT     Moonset
Sat -- 07:10 PM CDT     0.03 feet Low Tide
Sat -- 07:41 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.911.21.31.51.51.61.61.51.41.210.80.60.40.30.10.1000.10.20.4

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
Wind Forecast for New Orleans/Baton Rouge, LA (12,3,4,5)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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weather_mapweather_map weather_map

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 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.