Sunday, December8, 2019
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Marine Weather and Tides
Pearlington, MS

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 5:00PM Sunday December 8, 2019 7:47 PM CST (01:47 UTC) Moonrise 3:51PMMoonset 4:08AM Illumination 92% Phase: Waxing Gibbous; Moon at 12 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- 547 Pm Cst Sun Dec 8 2019
Tonight..Variable winds near 5 knots becoming south 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Areas of fog.
Monday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday night..South winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers after midnight.
Tuesday..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers in the morning, then showers in the afternoon.
Tuesday night..Northeast winds 15 to 20 knots. Waves 3 to 4 feet. Dominant period 4 seconds. Showers likely.
Wednesday..Northeast winds 15 to 20 knots. Waves 3 to 4 feet. Dominant period 4 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Wednesday night..Northeast winds 15 to 20 knots. Waves 3 to 4 feet. Dominant period 4 seconds. Chance of showers.
Thursday..Northeast winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds. Slight chance of showers.
Thursday night..Northeast winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday..North winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds. Slight chance of Thunderstorms in the morning. Chance of showers through the day.
Friday night..North winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 547 Pm Cst Sun Dec 8 2019
Synopsis..A cold front will move through the coastal waters Tuesday. High pressure will build over the area while a surface low develops over the central and eastern gulf Friday. This low could affect the coastal waters by the end of the week.


7 Day Forecast for Marine Location Near Pearlington, MS
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location: 30.14, -89.48     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 082353 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 553 PM CST Sun Dec 8 2019

UPDATE. Forecast grids and products were updated to include a Dense Fog Advisory for Mississippi Sound tonight and early Monday. 11

PREV DISCUSSION. /issued 302 PM CST Sun Dec 8 2019/

SHORT TERM . Area is coming in transition from moderating high pressure influence to onshore marine layer advection this evening. There has been a convergence boundary off the coast of Jackson Co, drifting westward. Radar is indicating a few shallow showers associated with this feature and should continue through sunset. This boundary passage will be the onset of deeper maritime flow that should be more conducive for sea fog formation in the coastal waters and near shore areas tonight. Temperatures are expected to be warm tonight through Tuesday morning despite extensive cloud cover. Deterministic model guidance and MOS temps are cool, but NBM shows several degrees warmer, which is more believable given recent cold biased model trends. Leading edge of arctic air mass moves shallowly into the forecast area Tuesday with over=running rainfall to ensue and continue into Wednesday. The models have come more in line with a progressive open wave impulse moving through the southern branch flow and have backed off the GFS notion of a negative tilt low previously indicated.

LONG TERM . Modifying arctic air remains settled over the area Wednesday and Thursday while a more vigorous upper level low develops in the southern branch and amplifies troughing upon arrival into the forecast area Friday. While the upper level pattern looks similar in the ECMWF and GFS, the surface and low levels are dramatically different. The ECMWF is considerably more south and slower in indicating gulf cyclogenesis Saturday morning. The GFS meanwhile, shows stronger cold pooling in the southern Plains that enhances baroclincity over the area for cyclogenesis in the north gulf Friday - about 18 hours sooner and well north. At this time, will be blending solutions to show some PoPs for Friday, drier Saturday, in deference to ECMWF. Temperatures will remain cool during the period but well above any critical values to consider winter precipitation, generally lows in the 40s, highs in the lower 60s Friday and Saturday.

MARINE . There may be some sea fog considerations over the sounds and tidal lakes as warm air advection brings dewpoints closer to water temperatures tonight and again Monday night. Light to moderate onshore flow through early Tuesday before wind shift with frontal passage throughout the day Tuesday. Air mass is likely to be shallow at first, with stronger cold air advection in lag but going in earnest Tuesday night for Small Craft Advisory criteria winds and seas, continuing through Wednesday. Gulf low pressure development somewhere in the middle to upper gulf later in the week to affect winds, but does appear to maintain strong winds and rough seas Friday into Saturday.

AVIATION . As winds continue to veer to onshore orientation, marine layer will continue to spread inland, lowering and maintaining MVFR to IFR ceilings. Sea fog advection into KGPT, KPQL, KBIX early this evening and possibly lowering at KNEW, KMSY, KASD, KHDC overnight into early Monday morning. Some slow improvement to MVFR levels heading into the afternoon.

DECISION SUPPORT . DSS code: Blue. Deployed: None. Activation: None. Activities: Support to City of New Orleans.

PRELIMINARY POINT TEMPS/POPS. MCB 52 74 57 69 / 0 30 80 90 BTR 54 77 59 69 / 10 20 70 90 ASD 51 76 60 75 / 0 20 40 90 MSY 56 76 64 76 / 10 10 30 80 GPT 53 71 61 72 / 0 10 20 80 PQL 51 75 61 77 / 0 10 20 80

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . Dense Fog Advisory until 6 AM CST Monday for GMZ532.

MS . None. GM .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 15 mi60 min S 5.1 G 8 63°F 61°F1016.8 hPa
SHBL1 - 8761305 - Shell Beach, LA 21 mi48 min SSE 4.1 G 4.1 61°F 65°F1017 hPa (+0.0)
NWCL1 - 8761927 - New Canal, LA 34 mi48 min Calm G 1 61°F 62°F1016.5 hPa (+0.4)
CARL1 38 mi48 min 51°F
42067 - USM3M02 48 mi48 min NW 3.9 G 5.8 65°F 4 ft1016.3 hPa (-0.3)

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 mi1.9 hrsSE 510.00 miMostly Cloudy63°F60°F94%1016.6 hPa
Slidell, Slidell Airport, LA23 mi55 minN 010.00 miFair59°F54°F83%1017.2 hPa

Link to 5 minute data for KHSA

Wind History from HSA (wind in knots)
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Last 24hrNE4N5------------------CalmN4N3NE5Calm3344SE5SE5SE53
1 day agoE4NE10------------------NE7NE9N7N6N6N9
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2 days agoCalm--------------------CalmCalmCalmS5S8
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Tide / Current Tables for Long Point, Lake Borgne, Louisiana
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Long Point
Click for Map
Sun -- 03:09 AM CST     Moonset
Sun -- 06:42 AM CST     Sunrise
Sun -- 08:12 AM CST     0.09 feet Low Tide
Sun -- 02:51 PM CST     Moonrise
Sun -- 04:58 PM CST     Sunset
Sun -- 10:13 PM CST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.50.40.30.20.10.10.10.10.10.10.20.20.30.30.40.50.50.60.70.70.80.8

Tide / Current Tables for Bay St. Louis, Mississippi
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Bay St. Louis
Click for Map
Sun -- 03:08 AM CST     Moonset
Sun -- 06:41 AM CST     Sunrise
Sun -- 07:50 AM CST     0.18 feet Low Tide
Sun -- 02:50 PM CST     Moonrise
Sun -- 04:56 PM CST     Sunset
Sun -- 09:52 PM CST     1.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.80.60.50.40.30.20.20.20.30.30.40.50.60.70.80.91.11.21.21.31.31.3

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 (20,4,5,8)
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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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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.