Saturday, December7, 2019
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Marine Weather and Tides
Lafitte, LA

Version 3.4
NOTICE
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.
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 6:41AMSunset 5:02PM Saturday December 7, 2019 12:40 PM CST (18:40 UTC) Moonrise 2:22PMMoonset 2:17AM Illumination 82% Phase: Waxing Gibbous; Moon at 11 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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GMZ538 Expires:201912080430;;993014 Fzus54 Klix 071525 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 925 Am Cst Sat Dec 7 2019 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. Gmz536-538-080430- Chandeleur Sound-breton Sound- 925 Am Cst Sat Dec 7 2019
Rest of today..Northeast winds 15 to 20 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tonight..Northeast winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday..East winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers in the afternoon.
Monday night..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers.
Tuesday..Southwest winds 10 to 15 knots becoming northwest late in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds. Showers likely.
Tuesday night..Northeast winds 20 to 25 knots. Waves 3 to 6 feet with occasional waves to 8 feet. Dominant period 4 seconds. Showers likely in the evening, then chance of showers after midnight.
Wednesday..Northeast winds 20 to 25 knots. Waves 3 to 6 feet with occasional waves to 8 feet. Dominant period 4 seconds. Chance of showers.
Wednesday night..Northeast winds 20 to 25 knots. Waves 3 to 6 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 925 Am Cst Sat Dec 7 2019
Synopsis..High pressure will settle over the north central gulf through Sunday. Another cold front will move through the coastal waters late Tuesday.


7 Day Forecast for Marine Location Near Lafitte, LA
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location: 29.54, -90.06     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 071802 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1202 PM CST Sat Dec 7 2019

UPDATE. Updated aviation section for 18z taf issuance.

PREV DISCUSSION. /issued 348 AM CST Sat Dec 7 2019/

SHORT TERM . The shallow shortwave that moved through the region yesterday is quickly racing east. It does look like clouds will hang in the area for most of the day. This combined with weak cold air advection should keep temps on the cool side today. Went just below MAV guidance for highs. For precip, a few lingering offshore showers will be possible. Sunday will bring a continuation of Saturday, albeit slightly warmer. Could once again see a few lingering showers in the coastal waters as weak surface low could develop in the northeastern Gulf of Mexico.

LONG TERM . A much more amplified upper level trough will move into the midsection of the country Monday, before lifting northeast Wednesday. It will start out as 2 separate troughs, one coming out of Canada and another racing through the Desert Southwest. They will merge Tuesday, spanning across the entire eastern half of the country. A cold front associated with this feature will move through the forecast area Tuesday morning. Expecting showers ahead of, along, and post frontal. Event qpf amounts suggested by medium range models are higher than previous forecasts, but still on the relatively low side at less than an inch. POP forecast is generally a blend of those 2 models, peaking at basically 100% Tuesday. The rain should quickly exit Wednesday as the apex of the trough passes east of the region.

Below normal temperatures will dominate the rest of the week and into the weekend as the CWA generally remains under upper level trough at varying degrees. While Thursday won't see rain, models have been showing the potential for a Gulf low to develop as a southern stream trough tracks across south Texas and into the northwestern Gulf of Mexico. At the least, this would provide moderate amounts of rain over the local area.

MEFFER

AVIATION . Overcast skies are expected for the forecast period. Ceilings will be more or less MVFR but some IFR dips are possible. There may be a small window of fog overnight into early morning but generally left out or put tempo groups since confidence is low. -BL

MARINE . A few locations showing fog this morning will begin to lift this morning as northerly winds rise over the nearshore waters. Winds will remain northerly around 10-15kt through today then become light and variable once again Sunday before abruptly becoming south Sunday night around 15-20kt. These conditions should hold into Monday night as another cold front approaches. Strong northerly winds and widespread showers will develop and remain through the day Tuesday evening. These conditions will be pressed south into the central gulf Wednesday night, but will rapidly move back into the area for the end of next week.

DECISION SUPPORT .

DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support to City of New Orleans

PRELIMINARY POINT TEMPS/POPS. MCB 50 70 53 75 / 0 0 0 30 BTR 49 72 54 81 / 0 0 0 30 ASD 49 72 52 77 / 0 10 0 20 MSY 54 71 57 77 / 0 0 0 20 GPT 52 69 55 72 / 0 10 0 10 PQL 51 72 53 74 / 0 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
GISL1 - 8761724 - Grand Isle, LA 20 mi52 min NNE 9.9 G 13 65°F
BYGL1 - 8762482 - Bayou Gauche, LA 26 mi58 min NNE 1.9 G 5.1 60°F 62°F1023.2 hPa
CARL1 27 mi52 min 51°F
KXPY 30 mi25 min NNE 8.9 63°F 59°F
SHBL1 - 8761305 - Shell Beach, LA 31 mi70 min NNE 8.9 G 11 59°F 64°F1023 hPa
NWCL1 - 8761927 - New Canal, LA 34 mi52 min NNE 8.9 G 11 59°F 61°F1022.2 hPa
KDLP 40 mi25 min NE 11 G 18 61°F 57°F
FREL1 44 mi52 min N 8 G 8.9 60°F 1022 hPa
LOPL1 - Louisiana Offshore Oil Port, LA 45 mi87 min NNE 19 G 22 62°F 3 ft1022.1 hPa56°F
PILL1 49 mi52 min NE 7 G 14 61°F 51°F1021.7 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA13 mi45 minN 710.00 miOvercast63°F55°F77%1022.3 hPa
New Orleans Naval Air Station - Alvin Callender Field, LA20 mi45 minNNE 710.00 miOvercast63°F55°F78%1022.5 hPa

Link to 5 minute data for KGAO

Wind History from GAO (wind in knots)
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Last 24hrSW8SW9SW6W7SW5SW6SW4SW3W5W3W3N4N4N7N6N7N10N8N5N7N8N9N6N8
1 day agoSE7SE6E6E4CalmCalmE3E3CalmCalmCalmCalmSE4CalmCalmSE3SE3SE3CalmSE4S10S11SW5SW8
2 days agoCalmCalmE4S4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE5NE7E5SE6

Tide / Current Tables for Manilla, Mississippi River Delta, Louisiana
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Manilla
Click for Map
Sat -- 02:16 AM CST     Moonset
Sat -- 06:41 AM CST     Sunrise
Sat -- 09:02 AM CST     0.24 feet Low Tide
Sat -- 02:21 PM CST     Moonrise
Sat -- 05:01 PM CST     Sunset
Sat -- 09:27 PM CST     0.65 feet High Tide
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 Independence Island, Mississippi River Delta, Louisiana
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Independence Island
Click for Map
Sat -- 02:16 AM CST     Moonset
Sat -- 06:40 AM CST     Sunrise
Sat -- 07:48 AM CST     0.22 feet Low Tide
Sat -- 02:21 PM CST     Moonrise
Sat -- 05:01 PM CST     Sunset
Sat -- 09:24 PM CST     0.59 feet High Tide
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
Wind Forecast for New Orleans/Baton Rouge, LA (13,3,4,5)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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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.