Sunday, February16, 2020
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Marine Weather and Tides
St. Martin, MS

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 6:33AMSunset 5:45PM Sunday February 16, 2020 2:17 PM CST (20:17 UTC) Moonrise 1:57AMMoonset 12:49PM Illumination 44% Phase: Third Quarter Moon; Moon at 23 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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GMZ532 Mississippi Sound- 937 Am Cst Sun Feb 16 2020
Rest of today..East winds 10 to 15 knots. Waves 1 to 3 feet. Dominant period 4 seconds. Showers and slight chance of Thunderstorms in the late morning and early afternoon. Visibility 1 mile or less in the late morning and early afternoon.
Tonight..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Patchy fog after midnight.
Monday..East winds near 5 knots becoming southeast in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Patchy fog early in the morning. Chance of showers and slight chance of Thunderstorms in the afternoon.
Monday night..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Tuesday..South winds 5 to 10 knots. Waves 1 to 2 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..South winds 5 to 10 knots becoming east after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday..North winds 10 to 15 knots. Waves 1 foot or less. Dominant period 4 seconds. Waves or seas building to 1 to 3 feet. Dominant period 4 seconds in the afternoon. Chance of showers and slight chance of Thunderstorms.
Wednesday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers.
Thursday..North winds 15 to 20 knots. Waves 3 to 5 feet. Showers likely.
Thursday night..Northeast winds 15 to 20 knots. Waves 3 to 5 feet. Slight chance of showers in the evening.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 937 Am Cst Sun Feb 16 2020
Synopsis..An area of low pressure will pass through the coastal waters today. Another stronger low pressure system will push a warm front through the area Monday night. As a low to the northwest pulls east, a strong cold front will sweep through the coastal waters Wednesday into Thursday.


7 Day Forecast for Marine Location Near St. Martin, MS
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location: 30.41, -88.9     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 160952 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 352 AM CST Sun Feb 16 2020

SYNOPSIS.

Warm front appears to have made it about as far north as Interstate 10 based on the wind field. Southern stream impulse moving eastward across Texas providing numerous rain showers across the area. There have even been a few elevated lightning flashes over the last few hours. Most of the rain is north of the warm front, but there is another batch of rain over the Gulf of Mexico to the southwest of Morgan City. Temperatures at 3 AM CST were in the 50s north of the front, lower 60s to the south.

SHORT TERM.

Texas shortwave should push most of the rain north and east of the CWA by about mid-day, with the exception of the Mississippi coastal counties and Louisiana coastal parishes. Even there, should be dry by about 3 PM. Continued day shift mention of fog overnight tonight, as we will be in the warmer air with an advective fog situation depicted by the GFS LAMP data. Another shortwave in a very active southern stream will move across the area Monday afternoon and night, with another round of showers and a few storms. Frontal system to the north sinks into the area Tuesday afternoon and evening, with more showers and a few storms. Bottom line . any sun will be extremely limited to non-existent through Tuesday, with multiple periods of wet weather. Don't expect to have any severe weather or flash flooding issues, but things won't be a total washout.

Regarding temperatures, MET guidance appears to be overly cool through Monday, with much lower dew points than remaining models. Trended toward a blend of GFS/ECMWF numbers. 35

LONG TERM.

Another couple of rounds of rain, Tuesday night and Wednesday night into Thursday, before northern stream shortwave finally pushes front well out into the Gulf of Mexico. Will continue slight chances of thunder in the forecast as long as we remain in the warm air. We'll finally dry out late Thursday night into Friday. Friday will really be the next opportunity for significant sunshine. That'll continue into Saturday. Beyond Saturday, ECMWF and GFS exhibit significant differences in solutions, so will go along with the consensus solution for now.

Will trend somewhat below blended numbers on lows for the extended, as the blends are running higher than either the GFS or ECMWF solutions by several degrees. Will accept the highs, however. 35

AVIATION.

Elevated convection has been mostly steady moderate rainfall with occasional embedded heavier rainfall in TSRA near KBTR. Ceilings should run generally MVFR but lower in heavier rain to around BKN- OVC 009-011. Convection should move out of the area from west to east between 18Z-21Z, then IFR ceilings persist into the night as cooler air becomes trapped under increasing frontal inversion aloft. 24/RR

MARINE.

Don't anticipate winds being a significant factor for marine areas until after the Wednesday night cold frontal passage. Clearly will be in a Small Craft Advisory situation for most of the waters Thursday into Friday, with model indications of gale force gusts over the Gulf. As mentioned above, there will be a threat of sea fog tonight, and potentially for the following 2 nights. Will only mention it for tonight for now, and let day shift re-assess. 35

DECISION SUPPORT. DSS code: Blue. Deployed: None. Activation: None. Activities: River flooding on Mississippi and Pearl; Ongoing NASA Stennis support; Parade safety briefings. Decision Support Services (DSS) Code Legend Green = No weather impacts that require action. Blue = Long-fused watch, warning, or advisory in effect or high visibility event; Marginal risk severe or excessive rain. Yellow = Heightened impacts with short-fused watch, warning or advisory issuances; radar support for slight risk severe or excessive rain. Orange = High Impacts; Enhanced risk severe; nearby tropical events; HazMat or other large episodes. Red = Full engagement for Moderate to high risk of severe and/or excessive rainfall, or direct tropical threats; Events of National Significance.

PRELIMINARY POINT TEMPS/POPS. MCB 63 53 72 63 / 90 10 40 60 BTR 68 56 75 66 / 90 10 60 50 ASD 65 54 73 63 / 100 10 40 50 MSY 67 58 74 66 / 100 10 40 30 GPT 63 55 69 62 / 100 10 30 50 PQL 63 54 73 62 / 100 10 30 50

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
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 18 mi54 min 58°F
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 23 mi54 min 56°F 58°F1017.3 hPa
PTBM6 - 8741003 - Petit Bois Island, MS 25 mi54 min 55°F 1016.2 hPa
GDXM6 - Grand Bay Reserve, MS 26 mi93 min ENE 9.9 55°F 1019 hPa54°F
42067 - USM3M02 30 mi78 min E 16 G 21 60°F 5 ft1015.6 hPa (-3.7)
KATA1 - Katrina Cut, AL 38 mi78 min ENE 12 55°F 1017.6 hPa (-3.0)
CRTA1 - Cedar Point, AL 41 mi48 min NNE 11 55°F 1016.3 hPa
MBPA1 44 mi48 min 55°F 55°F
DPIA1 - Dauphin Island, AL 45 mi78 min ENE 8.9 G 11 58°F 1017.3 hPa (-3.1)
FMOA1 - 8734673 - Fort Morgan, AL 48 mi54 min 61°F 1016.4 hPa
MCGA1 - 8736897 - Coast Guard Sector Mobile, AL 48 mi48 min 62°F 57°F1017.2 hPa
PTOA1 49 mi54 min 55°F 53°F

Wind History for West Pier, Port of Gulfport, MS
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Keesler Air Force Base / Biloxi, MS2 mi82 minNE 32.75 miRain Fog/Mist54°F53°F100%1017.9 hPa
Gulfport - Gulfport-Biloxi International Airport, MS9 mi25 minN 710.00 miOvercast56°F52°F87%1016.6 hPa
Moss Point - Trent Lott International Airport, MS20 mi25 minNNE 58.00 miOvercast57°F55°F93%1016.8 hPa

Link to 5 minute data for KBIX

Wind History from BIX (wind in knots)
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Last 24hrSE12SE10SE11SE7SE6SE4SE5E4E6E6E4CalmE3E6NE8NE12NE10NE9NE9E8NE9E8NE3N6
1 day agoNE12NE7N9N6NE6NE6NE7NE9NE8NE9NE7NE7NE8NE7NE7NE6E7E8E7E7SE9SE13SE14SE11
2 days agoN16
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Tide / Current Tables for Biloxi, Biloxi Bay, Mississippi
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Biloxi
Click for Map
Sun -- 12:56 AM CST     Moonrise
Sun -- 03:39 AM CST     -0.53 feet Low Tide
Sun -- 06:35 AM CST     Sunrise
Sun -- 11:48 AM CST     Moonset
Sun -- 04:36 PM CST     1.56 feet High Tide
Sun -- 05:44 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.3-0.5-0.5-0.5-0.5-0.4-0.2-0.10.10.40.60.91.11.31.51.51.61.51.31.10.90.60.2

Tide / Current Tables for Gulfport, Gulfport Harbor, Mississippi
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Gulfport
Click for Map
Sun -- 12:57 AM CST     Moonrise
Sun -- 05:03 AM CST     0.29 feet Low Tide
Sun -- 06:36 AM CST     Sunrise
Sun -- 11:49 AM CST     Moonset
Sun -- 04:28 PM CST     1.70 feet High Tide
Sun -- 05:45 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.40.30.30.30.30.40.50.70.80.91.11.31.51.61.71.71.61.61.51.31.10.8

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 (15,3,4,5)
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Ground Weather Radar Station Mobile, AL
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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.