Tuesday, March31, 2020
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Marine Weather and Tides
Boothville, 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 6:48AMSunset 7:19PM Tuesday March 31, 2020 10:22 AM CDT (15:22 UTC) Moonrise 11:34AMMoonset 1:02AM Illumination 51% Phase: First Quarter Moon; Moon at 7 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:202003312200;;357787 Fzus54 Klix 311447 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 947 Am Cdt Tue Mar 31 2020 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. Gmz536-538-312200- Chandeleur Sound-breton Sound- 947 Am Cdt Tue Mar 31 2020
.small craft advisory in effect through Wednesday morning...
Rest of today..Southwest winds 20 to 25 knots becoming northwest in the afternoon. Waves 3 to 6 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms in the morning.
Tonight..North winds 25 to 30 knots easing to 15 to 20 knots after midnight. Waves 3 to 5 feet with occasional waves to 6 feet. Dominant period 4 seconds.
Wednesday..Northeast winds 15 to 20 knots becoming northwest near 10 knots late in the afternoon. Waves 3 to 6 feet. Dominant period 4 seconds. Waves subsiding to 2 to 4 feet in the afternoon. Dominant period 4 seconds in the afternoon.
Wednesday night..Northwest winds 5 to 10 knots becoming northeast 10 to 15 knots in the late evening. Waves 2 to 4 feet. Dominant period 4 seconds.
Thursday..East winds 10 to 15 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Thursday night..Southeast winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Friday..Southeast winds 10 to 15 knots. Waves 2 to 4 feet.
Friday night..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Slight chance of showers after midnight.
Saturday..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Chance of showers.
Saturday night..East winds 10 to 15 knots. Waves 2 to 4 feet. Chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 947 Am Cdt Tue Mar 31 2020
Synopsis..A cold front will pass through the coastal waters today. High pressure will build over the waters tonight and remain in place through Thursday. The high will slide toward the eastern gulf by Friday and remain east of the area on Saturday.


7 Day Forecast for Marine Location Near Boothville, LA
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location: 29.49, -89.17     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 310901 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 401 AM CDT Tue Mar 31 2020

SHORT TERM. Marginal risk of severe will move east as a cold front passes today. Some deeper and stronger convective cells could form this morning with strong wind gusts the primary concern.

By this afternoon, dry air advection will take hold of the area. Skies will begin to clear and a breezy west wind will develop. Cold air advection will be delayed behind the front, and the combination of strong solar insolation and dry air will allow for near record highs in the middle 80s. The cold air will finally begin to advect into the region tonight, and overnight lows should be near to slightly below average in the upper 40s and lower 50s. Deep layer ridging will dominate the forecast area Wednesday with clear skies, low humidity, and near normal temperatures expected.

LONG TERM. Upper level ridge will move eastward on Thursday, and an approaching shortwave trough will begin to approach from the west. Gradually increasing cloud cover is expected through the day, and temperatures will remain near normal as the flow pattern aloft turns largely zonal. The shortwave feature will quickly push through the forecast area Thursday night, and expect to see cloudy skies and isolated to scattered rain showers develop. Any rainfall should be on the lighter side as this system will be fairly weak and have limited amounts of moisture to work with. The zonal flow pattern in the mid and upper levels will continue to dominate the Gulf South through the weekend, and a series of fast moving vorticity maxima will slide through the region. Conditions on Friday will largely be similar to Thursday night as limited moisture keeps rainfall on the lighter side and isolated to widely scattered in nature. However, a higher theta e airmass and the associated higher precipitable water values will overspread the forecast area on the back of increased onshore flow by Saturday night. This pool of deeper moisture will allow for higher rain chances in the 50 to 60 percent chance range on Sunday as the strongest of the shortwave features passes through the area. Lapse rates will not be incredibly steep, but will be supportive of some isolated thunderstorms Saturday night into Sunday. The rainfall over the weekend will be welcome after a rather dry stretch these past couple of weeks. Upper level ridging and increasing subsidence should begin to overspread the region Sunday night into Monday, and gradually decreasing rain chances are expected. Temperatures through the weekend will be above normal with highs in the lower 80s and lows in the 60s. As the upper level ridge builds over the area on Monday, temperatures should further warm into the middle 80s.

AVIATION. MVFR ceilings becoming predominant early this morning ahead of the low pressure/cold front approaching the Mississippi River near Monroe, with the front stretching back to near KLCH. Movement is somewhat slower than what was anticipated 24 hours ago, roughly by 4 to 6 hours. This would have wind shift line to KBTR somewhere around 12z, KASD-New Orleans-KHUM around 15-16z, and the MS-AL state line around 18z. At this point, any mention of TSRA in the 12z package would likely be limited to KMCB, unless additional development becomes apparent in the next hour or two. Improvement in ceilings to VFR may lag the wind shift/front by a few hours. Once conditions improve to VFR behind the front, they should remain there for the remainder of the forecast period. KNEW and KMSY will likely see 25 knot gusts for most of the afternoon hours. 35

MARINE. Small craft advisories will remain through 7am Wednesday but may be exteneded for at least a few more hours as winds may not ease back below criteria until later Wed morning. Northeasterly Winds will ease back through the day Wed to around 10-15kt and begin to shift to east Thursday and back to SE by Thursday night. These conditions should remain through the weekend with some sh/ts moving in over the weekend.

DECISION SUPPORT. DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support for COVID-19 outdoor test sites. River Flood Warnings Small Craft Advisories Monitoring convection this morning

PRELIMINARY POINT TEMPS/POPS. MCB 78 48 73 52 / 60 0 0 0 BTR 77 49 74 54 / 50 0 0 0 ASD 82 49 75 54 / 40 0 0 0 MSY 83 57 74 60 / 30 0 0 0 GPT 82 52 73 56 / 50 0 0 0 PQL 85 49 75 52 / 40 0 0 0

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . Small Craft Advisory from 7 AM this morning to 7 AM CDT Wednesday for GMZ530-532-534-536-538-550-552-555-557-570- 572-575-577.

MS . None. GM . Small Craft Advisory from 7 AM this morning to 7 AM CDT Wednesday for GMZ532-534-536-538-550-552-555-557-570-572- 575-577.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KMIS 22 mi27 min WSW 16 79°F 72°F
PILL1 22 mi52 min WSW 18 G 22 74°F 60°F1010.4 hPa
KDLP 32 mi27 min SW 18 G 24 77°F 73°F
SHBL1 - 8761305 - Shell Beach, LA 37 mi52 min 78°F 78°F1009.4 hPa
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 41 mi52 min WSW 21 G 25
KVKY 42 mi27 min WSW 26 75°F 73°F
BURL1 - Southwest Pass, LA 43 mi82 min 20 G 21
GISL1 - 8761724 - Grand Isle, LA 45 mi52 min NNW 21 G 28 79°F

Wind History for Shell Beach, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Main Pass 140B (Apache Corp), LA22 mi27 minWSW 164.00 miFair with Haze79°F71°F79%1010.5 hPa

Link to 5 minute data for KBVE

Wind History from BVE (wind in knots)
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1 day agoS12SW12SW12S11S10S9S12S10S10S8S9S9S10S10S9S9SW10SW13N11
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2 days agoNE7NE6NE5E4NE5E3CalmCalmCalmSE3CalmCalmN3CalmSE3SE4S7S6S9S8S10S11S11S12

Tide / Current Tables for Breton Islands, Louisiana
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Breton Islands
Click for Map
Tue -- 01:02 AM CDT     Moonset
Tue -- 02:31 AM CDT     -0.26 feet Low Tide
Tue -- 06:46 AM CDT     Sunrise
Tue -- 11:33 AM CDT     Moonrise
Tue -- 03:50 PM CDT     1.37 feet High Tide
Tue -- 07:14 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-0.2-0.3-0.3-0.2-0.100.20.30.50.70.911.21.31.41.41.31.21.10.90.70.50.2

Tide / Current Tables for Jack Bay, Louisiana
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Jack Bay
Click for Map
Tue -- 01:02 AM CDT     Moonset
Tue -- 03:16 AM CDT     -0.23 feet Low Tide
Tue -- 06:47 AM CDT     Sunrise
Tue -- 11:34 AM CDT     Moonrise
Tue -- 04:23 PM CDT     1.17 feet High Tide
Tue -- 07:15 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0-0.1-0.2-0.2-0.2-0.2-0.10.10.20.30.50.70.80.911.11.21.21.110.90.70.50.3

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 (11,2,3,4)
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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 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.