Sunday, September20, 2020
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Marine Weather and Tides
Waveland, MS

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:45AMSunset 6:59PM Sunday September 20, 2020 7:06 AM CDT (12:06 UTC) Moonrise 10:13AMMoonset 9:32PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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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GMZ534 Lake Borgne- 408 Am Cdt Sun Sep 20 2020
.small craft advisory in effect through Monday evening...
Today..East winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers and slight chance of Thunderstorms.
Tonight..East winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers likely in the evening, then chance of showers after midnight.
Monday..East winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers likely and slight chance of Thunderstorms.
Monday night..East winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers.
Tuesday..East winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers in the morning. Slight chance of Thunderstorms through the day. Showers likely in the afternoon.
Tuesday night..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers through the night. Slight chance of Thunderstorms after midnight.
Wednesday..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Rain likely and slight chance of Thunderstorms.
Wednesday night..Southeast winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of rain and slight chance of Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Waves 1 to 3 feet. Dominant period 4 seconds. Rain likely in the morning. Chance of Thunderstorms through the day. Showers likely in the afternoon.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 408 Am Cdt Sun Sep 20 2020
Synopsis..A weak frontal zone draped across the region will continue to slowly erode over today. Tropical storm beta, located over the western gulf of mexico, will continue to meander over the west and northwestern gulf through early next week. Refer to the latest advisories issued by the national hurricane center regarding tropical storm beta.


7 Day Forecast for Marine Location Near Waveland, MS
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location: 30.13, -89.43     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 201149 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA Issued by National Weather Service Jacksonville FL 649 AM CDT Sun Sep 20 2020

AVIATION. 201200 UTC TO 211200 UTC . Main adjustments for this period were a general lowering of ceilings by 5 to 10 kft as conditions over land appear to be more stable and stratiform than tropical. Convection and stronger rain bands appear to be hinged to the maritime environment and it's going to take some breaks in the stratiform cloudiness over land to lift them. That said I didn't go nearly as low as guidance suggests. Fields closer to the coast GPT, HUM, MSY and NEW introduced the possibility of a rain band coming ashore later in the day and early this evening in case we get enough breaks in the lower stratiform deck and increase instability near the coast. One other minor adjustment was I tweaked the winds and gusts at NOLA Lakefront (NEW) up a tad (2 to 4 knots) due to the open lake exposure.

PREV DISCUSSION. /issued 511 AM CDT Sun Sep 20 2020/

DISCUSSION . Beta continues to look rather unimpressive in the western Gulf. Latest form NHC now keep Beta as a tropical storm through landfall over the central TX coast.

Today and into Monday we will see widespread light to brief periods of heavy rain. The risk for heavier rain will be just outside of the next 36hrs. Deep moisture is already over the area and with the combination of LL convergence and divergence aloft we should see widespread light to brief periods of moderate rain over much of the area but the heaviest rain looks to occur along and south of the I 10/12 corridor. As Beta starts to pull off to the west later today and tonight we should begin to see rain slowly taper off some with mainly just light rain tonight and through much of tomorrow but things could begin to change Monday night.

Biggest concern at this time looks to be rain potential late Monday and through Tuesday night. As Beta continues to weaken and lift north there may be a band of heavy rain detached from Beta that looks to set up over south LA and possibly into southwestern MS overnight Monday, Tuesday and maybe even lingering into Wednesday. There are indications that there could be a rather strong LL convergent axis set up across the area. This will coincide with deep moisture in place, PWs greater than 2", the h85 theta e ridge of 343K draped over the area, and K index values of 35-38C. There may even be divergence aloft and some instability to work with. All of this suggest that rain will be quite efficient and with a few thunderstorms possible and we could see a band of very heavy rain. In addition if this does set up it doesn't appear that it will be quick to move leading to training of storms. Some models are indicating rainfall over the time from Monday night through Tuesday night could be around 2-6 inches with locally higher amounts possible. There is some confidence on this band developing but the biggest question is exactly where this would develop. With this likely not beginning till Monday night and confidence still not great will hold off on a flash flood watch at this time but day shift will need to look harder at this and decide if one is needed.

As Beta begins to lift across the Southern Plains and into the Ozarks it will become absorbed in the main flow but it will leave a trough in place. This could keep slight to chance PoPs in the forecast through the remainder of the week but the threat of heavy rain should be long gone by Thursday. Highs will be around to possibly just below normal mainly thanks to cloud cover and maybe a few showers and thunderstorms. /CAB/

AVIATION . All terminals will continue to see impacts for the next 24 to possibly 72 hours. Biggest issue is cigs where widespread MVFR to IFR cigs are expected. Not anticipating vsbys dropping below 6sm unless there is rain occurring and that will be back and forth through the day today. Also not anticipating anything more than isolated tsra mainly for the terminals south of the lake. /CAB/

MARINE . Conditions remain hazardous across all coastal waters and current headlines will continue. Coastal flood advisory will remain in place and tides of 1-3 feet above normal are still expected across much of the coast. Once Tropical Storm warnings drop for the waters south and west of the mouth of the River they will likely move into a small craft advisory and these advisories look to continue through at least Wednesday. Winds should finally begin to relax late Wednesday or Thursday. /CAB/

PRELIMINARY POINT TEMPS/POPS. MCB 75 65 74 64 / 50 30 40 40 BTR 76 67 75 67 / 60 50 60 50 ASD 76 65 75 66 / 60 40 60 40 MSY 77 72 77 72 / 60 50 60 50 GPT 75 66 75 67 / 40 30 40 30 PQL 77 64 77 65 / 40 30 40 30

LIX WATCHES/WARNINGS/ADVISORIES. LA . Wind Advisory until 7 AM CDT this morning for LAZ056>070.

Coastal Flood Advisory until 3 AM CDT Wednesday for LAZ040-049- 050-058-060>062-064-066>070-072.

GM . Tropical Storm Warning for GMZ550-552-570-572-575.

Small Craft Advisory until 7 AM CDT Monday for GMZ530-532-534- 536-538-555-557-577.

MS . Coastal Flood Advisory until 3 AM CDT Wednesday for MSZ080>082.

GM . Tropical Storm Warning for GMZ552-570-572-575.

Small Craft Advisory until 7 AM CDT Monday for GMZ532-534-536- 538-555-557-577.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 15 mi55 min ENE 17 G 21 71°F 74°F1015.8 hPa
SHBL1 - 8761305 - Shell Beach, LA 22 mi49 min NE 26 G 31 72°F 78°F1013.6 hPa
NWCL1 - 8761927 - New Canal, LA 37 mi49 min ENE 27 G 31 71°F 78°F1012.2 hPa
CARL1 40 mi49 min 83°F
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 49 mi55 min 76°F
PTBM6 - 8741003 - Petit Bois Island, MS 49 mi49 min ENE 25 G 28 71°F 1015.9 hPa

Wind History for Bay Waveland Yacht Club, MS
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay St. Louis, Stennis International Airport, MS16 mi12 minNNE 10 G 165.00 miRain66°F64°F94%1015.9 hPa

Link to 5 minute data for KHSA

Wind History from HSA (wind in knots)
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NE8NE7NE8NE8NE8NE8NE6NE6NE10NE10--------------------NE10
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1 day agoN6NE5NE7N6N6N6N5N5N5--N5N5N5--------------------NE6
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Tide / Current Tables for Long Point, Lake Borgne, Louisiana
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Long Point
Click for Map
Sun -- 02:29 AM CDT     1.08 feet High Tide
Sun -- 06:45 AM CDT     Sunrise
Sun -- 10:14 AM CDT     Moonrise
Sun -- 12:59 PM CDT     0.37 feet Low Tide
Sun -- 06:56 PM CDT     Sunset
Sun -- 09:32 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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111.11.1110.90.80.70.60.50.40.40.40.40.40.50.50.60.70.70.80.91

Tide / Current Tables for Bay St. Louis, Mississippi
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Bay St. Louis
Click for Map
Sun -- 01:50 AM CDT     1.68 feet High Tide
Sun -- 06:44 AM CDT     Sunrise
Sun -- 10:13 AM CDT     Moonrise
Sun -- 01:26 PM CDT     0.61 feet Low Tide
Sun -- 06:55 PM CDT     Sunset
Sun -- 09:31 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.71.71.71.61.51.41.21.10.90.80.70.60.60.60.70.70.80.91.11.21.41.51.7

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
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.