Tuesday, May26, 2020
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Marine Weather and Tides
Port Sulphur, 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 5:59AMSunset 7:54PM Tuesday May 26, 2020 12:51 PM CDT (17:51 UTC) Moonrise 9:15AMMoonset 11:39PM Illumination 21% 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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GMZ538 Expires:202005270415;;784825 Fzus54 Klix 261519 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 1019 Am Cdt Tue May 26 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. Gmz536-538-270415- Chandeleur Sound-breton Sound- 1019 Am Cdt Tue May 26 2020
Rest of today..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers late in the morning. Chance of Thunderstorms through the day. Showers likely in the afternoon.
Tonight..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms early in the morning, then showers and Thunderstorms likely in the late morning and afternoon.
Wednesday night..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of Thunderstorms early in the evening. Chance of showers through the night. Slight chance of Thunderstorms after midnight.
Thursday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Thursday night..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers after midnight.
Friday..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday night..Southwest winds 5 to 10 knots becoming northwest after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday..North winds 5 to 10 knots becoming south late in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday night..West winds 5 to 10 knots becoming north 10 to 15 knots after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the evening.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1019 Am Cdt Tue May 26 2020
Synopsis..High pressure will slowly setup over the mid-atlantic through Thursday and extend into the north central gulf through the weekend.


7 Day Forecast for Marine Location Near Port Sulphur, LA
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location: 29.6, -89.62     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 261739 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1239 PM CDT Tue May 26 2020

AVIATION.

Primarily VFR conditions at present, with convection in the process of departing the KBTR and KHUM terminal areas. Where convection is occurring, it's producing MVFR ceilings and occasional IFR visibilities. Wouldn't be shocked to see a 30 knot gust somewhere, but those have been pretty sparse this morning. Looks like convection may be east of all terminals except KGPT by about 21z. Not sure we'll see recovery for additional convective development this afternoon. HRRR indicates precipitation will be very low coverage overnight if it occurs at all. Potential for some MVFR ceilings toward morning, and then some convection at mid-morning Wednesday, but areal coverage expected to be considerably less than this morning. 35

PREV DISCUSSION. /issued 416 AM CDT Tue May 26 2020/

SHORT TERM . Today and Wednesday should show precip numbers to be high. Guidance is now trying to push the bulk of rain to the east of the area for Thursday and basically dry slot us. Numbers have been backed off from previous values but will keep the whole area in 30-50% until this becomes a dominant trend. Some thunderstorms today and especially Wed could be strong to possibly severe and produce very heavy rainfall. Although rain accumulations area wide are not large, some isolated locations could receive around 2+ inches with any training echoes in a short period causing flooding of low lying and poor drainage areas.

Winds will begin to ease today over the gulf waters causing tides to fall back toward more normal levels, so one more day of minor coastal flooding at high tide today and we should begin to recede. Temperatures should remain in the mid 80s or lower in most areas today through Wed because of the expected greater coverage of sh/ts developing earlier in the day. Thursday looks to be warmer if the area can stay in this dry trend.

LONG TERM . The extended portion of the forecast will be a rather significant change from from what we are expecting in the first 72 hours. Models have come into better agreement with the setup in the midlevels and it looks dry to end the weekend and begin the next week. The bad news, Summer may hit us like a ton of bricks early next week.

Friday and to start the weekend the cutoff low that was over the ARKLATEX and moving into the Lower/Mid MS Valley will already be opening up and merging into the developing L/W trough over the eastern CONUS. We will still have decent rain chances Fri and possibly Sat as the trough axis slowly works across the area. Moisture does recover for Fri and with the trough axis back to the west we should see broad lift combine with daytime heating and weak lake/seabreeze influence that will likely lead to scattered to possibly numerous showers and thunderstorms during the day. Sat may be much the same but a lot will depend on where the trough is. Trends have been to speed things up a bit but it still may be over the area. That changes as we head into Sunday.

The L/W trough is expected to deepen over the east coast with northwest flow over the region and a rather stout ridge building over the Rockies and into the southern Plains. This will along with drier air working in from the north will likely keep things dry on Sunday now.

Monday and afterwards the ridge building to our west will continue to work east with a ridge axis extending east-southeast through the north-central Gulf Sunday night and by late Monday could be centered over the ARKLATEX region. This suggest rather warm temperatures for the area and a good chance that upper 80s to lower 90s will be seen with far more sites likely seeing lower 90s by Tuesday. Heat index could be an issue but there is one silver lining, it looks like the drier air that is expected to work into the region Sunday should remain in place through Tuesday so heat index values right now aren't forecast abv the mid 90s, at least not yet. /CAB/

AVIATION . VFR conditions should be around for at least several hours today. But all terminals should have at least some IFR or lower conditions for some duration today as scattered to numerous TSRA move over the area. A few of these could last into the early evening hours as well but the major portion of the overnight should be VFR.

MARINE . Small craft advisories will expire this morning as winds continue to ease. The major component of seas today will be swell as winds ease and periods extend. A more typical high pressure ridge over the eastern gulf coast/southeast states will bring a return of light to moderate south to southeast winds mostly in the 10 to 15 knots range through the remainder of the week. Winds and seas will be higher in and around scattered to numerous showers and thunderstorms through much this week.

PRELIMINARY POINT TEMPS/POPS. MCB 83 69 84 68 / 80 60 80 40 BTR 85 69 84 67 / 90 60 80 30 ASD 85 69 86 68 / 70 50 80 40 MSY 85 72 85 71 / 80 50 70 30 GPT 82 73 83 72 / 60 50 80 50 PQL 84 70 85 69 / 60 40 80 50

LIX WATCHES/WARNINGS/ADVISORIES. LA . Coastal Flood Advisory until 5 PM CDT this afternoon for LAZ062- 064-069-070.

GM . None. MS . Coastal Flood Advisory until 5 PM CDT this afternoon for MSZ080.

GM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHBL1 - 8761305 - Shell Beach, LA 19 mi51 min NNE 6 G 8.9 78°F 83°F1012.4 hPa (+0.6)
GISL1 - 8761724 - Grand Isle, LA 29 mi51 min 2.9 G 5.1 81°F
KDLP 33 mi16 min SW 6 82°F 75°F
PILL1 35 mi51 min S 8 G 9.9 78°F 72°F1012.1 hPa (+0.9)
CARL1 36 mi51 min 72°F
NWCL1 - 8761927 - New Canal, LA 39 mi51 min ENE 6 G 7 78°F 81°F1012 hPa (+0.9)
BYGL1 - 8762482 - Bayou Gauche, LA 44 mi51 min Calm G 2.9 77°F 82°F1012.7 hPa (+1.0)
KXPY 45 mi11 min NNW 11 G 17 79°F 73°F
KMIS 46 mi16 min SE 2.9 84°F 73°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 48 mi51 min 78°F 1010.7 hPa (+0.8)
BURL1 - Southwest Pass, LA 49 mi51 min 6 G 7

Wind History for Shell Beach, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

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 Gardner Island, Breton Sound, Louisiana
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Gardner Island
Click for Map
Tue -- 12:24 AM CDT     -0.41 feet Low Tide
Tue -- 05:59 AM CDT     Sunrise
Tue -- 09:13 AM CDT     Moonrise
Tue -- 01:12 PM CDT     1.86 feet High Tide
Tue -- 07:50 PM CDT     Sunset
Tue -- 11:38 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.4-0.3-0.200.20.50.711.31.51.71.81.91.81.71.61.31.10.80.50.2-0-0.2

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
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Shell Beach
Click for Map
Tue -- 04:17 AM CDT     -0.36 feet Low Tide
Tue -- 05:59 AM CDT     Sunrise
Tue -- 09:14 AM CDT     Moonrise
Tue -- 04:53 PM CDT     1.62 feet High Tide
Tue -- 07:51 PM CDT     Sunset
Tue -- 11:40 PM CDT     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.
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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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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.