Wednesday, January19, 2022
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Marine Weather and Tides
St. Martin, MS

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:50AMSunset 5:21PM Wednesday January 19, 2022 2:47 AM CST (08:47 UTC) Moonrise 8:02PMMoonset 9:16AM Illumination 97% Phase: Waning Gibbous; Moon at 17 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- 915 Pm Cst Tue Jan 18 2022
Rest of tonight..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Wednesday..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Wednesday night..South winds 10 to 15 knots becoming southwest after midnight. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers in the late evening and early morning. Showers likely after midnight.
Thursday..West winds 10 to 15 knots becoming north 15 to 20 knots in the late morning and afternoon. Waves 3 to 5 feet. Dominant period 4 seconds. Showers likely in the morning. Slight chance of Thunderstorms until late afternoon. Chance of showers in the afternoon.
Thursday night..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers in the evening, then showers likely and chance of light freezing rain after midnight.
Friday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers.
Friday night..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Slight chance of showers in the evening.
Saturday..Northeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Saturday night..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Sunday..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Sunday night..Northwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 915 Pm Cst Tue Jan 18 2022
Synopsis..A cold front will sweep through the area tomorrow into tomorrow night. A low pressure will then pass through the northern gulf of mexico Thursday into Friday. High pressure will build in behind this system over the weekend.


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 190533 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1133 PM CST Tue Jan 18 2022

AVIATION UPDATE . Updated for 06Z TAF issuance.

PREV DISCUSSION . /issued 409 PM CST Tue Jan 18 2022/

SHORT TERM (Wednesday through Friday) . A rather complex forecast scenario will play out over the short term period. Initially, the region will remain beneath a zonal flow regime in the mid and upper levels. In the low levels, ridging will remain centered east of the area, and this will allow for continued warm air and moisture advection into the forecast area. As a result, warmer than average temperatures are expected tonight into tomorrow. Lows will dip into the upper 40s and lower 50s tonight and highs tomorrow will climb into the upper 60s and lower 70s. These values are close to 10 degrees warmer than average for this time of year. Additionally, a vigorous upper level trough will begin to strengthen over the southern Plains, and a region of favorable jet dynamics will support the formation of a surface low over the Arklatex by tomorrow afternoon. The increase in moisture and positive vorticity advection in advance of the deepening upper level trough will support the development of showers by the afternoon hours over the northwest portion of the CWA by late Wednesday afternoon.

As the low moves east into the Tennessee Valley tomorrow night, a strong cold front will sweep into the Lower Mississippi Valley. This front should rapidly push through the forecast area during the overnight hours and be located over the northern Gulf by Thursday morning. Although surface based instability will remain somewhat limited, lapse rates steepen above a mid-level inversion in the 3-6km range. This could support some elevated thunderstorm development in advance of the front Wednesday night into Thursday, and have included the mention of thunderstorms in the forecast during this period. Temperatures will cool rapidly behind the front, with a fairly large gradient expected by Thursday morning. Lows in the northwest part of the CWA should drop into the mid 30s, but coastal areas will remain in the lower to middle 50s. Highs on Thursday will maintain this large gradient with temperatures only warming into the upper 40s over parts of Southwest Mississippi, but climbing into the mid 60s along the Louisiana coast.

The forecast gets more interesting from Thursday night through Friday morning, and this is the period of time when the potential for a winter weather event will be maximized. The cold front will remain stalled over the northern Gulf, and a Gulf low is expected to develop in a region of increased lift beneath a passing jet streak. The low will continue to deepen as it moves to the east, and a region of strong deep layer forcing is expected to develop across the CWA. The one limiting factor could be the extent of available moisture, but there should still be sufficient moisture in place based on strong isentropic forcing over the shallow cold pool at the surface to support cloud and rain development. The moisture gradient will be rather sharp with far northern zones seeing lower probabilities of precipitation and coastal areas the highest chance. The cold pool at the surface will see temperatures fall into the upper 20s and lower 30s by Friday morning, but the cold pool will be shallow at 1500 feet or less. Above this shallow cold pool, sounding analysis indicates a nose of very warm air on the order of 4 to 5C or around 40F that will melt any snow falling from higher levels. Since the cold pool is expected to so shallow, refreezing is not expected, and sleet has not been included in the forecast. Thus, freezing rain is expected to develop by the late evening hours of Thursday and persist into the mid-morning hours on Friday. Although QPF values will remain light with values of only around a tenth of an inch or less expected, this amount of ice will have significant impacts in the area. The duration of the colder air will support icing of elevated surfaces like bridges, power lines, and tree limbs late Thursday night into Friday morning. The only region that should remain above freezing is the southshore of metro New Orleans and extreme coastal Louisiana.

Temperatures should warm above freezing by late morning on Friday, and drier air should begin to gradually advect in from the north as the surface low and upper level trough axis pull to the east. However, the 925mb thermal trough will keep clouds in place through the day, and highs will struggle to reach the lower 40s. Continued negative vorticity advection into the region Friday night will allow skies to clear and stronger radiational cooling is expected. Temperatures will plunge into the lower to middle 20s over the northern half of the CWA Friday night, and the lower 30s over the southern half. This could be the coldest night of the season and a hard freeze could occur over northern parts of the CWA.

LONG TERM (Saturday through Tuesday) . Zonal flow will take hold over the weekend in the mid and upper levels while a strong surface high dominates in the low levels. Strong subsidence will keep skies clear and humidity values low on Saturday and Sunday, and temperatures will slowly modify as the 925mb thermal trough axis pulls to the east on Saturday. Highs will remain cooler than average, but will warm from the upper 40s and lower 50s on Saturday into the lower to middle 50s on Sunday. Lows will drop back into the 20s and lower 30s Saturday night, but should be slightly warmer in the lower to middle 30s Sunday night.

Another fast moving upper level low will move along through the zonal flow regime and impact the forecast area on Monday and Tuesday. A surface low should form along the surface front over the northern Gulf and then sweep through the northern Gulf Monday night into Tuesday. Another round of isentropic forcing and favorable jet dynamics will support cloud and shower development from Monday afternoon into Tuesday. Fortunately, the airmass will be significantly warmer during this period with highs in the upper 50s and lows in the upper 30s and lower 40s, so winter weather threats are currently not anticipated with this next system.

AVIATION . VFR conditions are expected for all terminals. Clouds will begin to roll in later today and the ceilings will lower but should remain low VFR. Showers will begin to enter the area from the northwestern most terminals moving southeastward as a cold front approaches the area. -BL

MARINE . A strong low pressure system will bring a period of small craft advisory conditions to the coastal waters beginning tomorrow night and persisting into Saturday. High pressure will briefly build over the waters for Sunday, but the gradient will remain fairly tight over the northern Gulf. As a result, winds should remain elevated at 15 to 20 knots. Another low should then impact the waters early next week, and a period of small craft advisory conditions should return.

PRELIMINARY POINT TEMPS/POPS. MCB 49 72 39 50 / 0 20 70 50 BTR 52 74 42 52 / 0 20 60 40 ASD 49 73 48 60 / 0 10 60 70 MSY 54 74 51 60 / 0 10 60 60 GPT 51 69 52 61 / 0 10 70 70 PQL 48 71 54 64 / 0 10 70 70

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 mi48 min 55°F
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 23 mi48 min SSE 5.1G6 59°F 52°F1019.7 hPa (-0.5)
PTBM6 - 8741003 - Petit Bois Island, MS 25 mi48 min SSE 14G17 64°F 1020.4 hPa (-0.7)
MBPA1 44 mi48 min 56°F
MBLA1 - Middle Bay Light, AL 47 mi78 min SE 14 1020.3 hPa
FMOA1 - 8734673 - Fort Morgan, AL 48 mi48 min SSE 16G18 61°F 1020.5 hPa (-0.9)
MCGA1 - 8736897 - Coast Guard Sector Mobile, AL 48 mi48 min SE 6G8.9 55°F 55°F1020.4 hPa (-0.5)
PTOA1 49 mi48 min 55°F 51°F

Wind History for West Pier, Port of Gulfport, MS
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Last 24 hr
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Keesler Air Force Base / Biloxi, MS2 mi52 minN 010.00 miMostly Cloudy49°F46°F92%1019.6 hPa
Gulfport - Gulfport-Biloxi International Airport, MS9 mi55 minN 08.00 miA Few Clouds43°F42°F97%1019.6 hPa
Moss Point - Trent Lott International Airport, MS20 mi55 minN 010.00 miMostly Cloudy51°F49°F92%1020.3 hPa

Link to 5 minute data for KBIX

Wind History from BIX (wind in knots)
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Last 24 hrNE4000NE4NE3E4E6SE8SE7SE7SE7SE7SE6SE6SE4SE60E3E3E30NE30
1 day ago0NW3NW3NW3NW5NW4NW7N4N4N6NW6N4N6NW50000000000
2 days agoW6W6W5W6W7W8W6NW5NW6NW6NW6NW8NW8NW8NW7NW3NW3NW4NW5NW3W3W40NW3

Tide / Current Tables for Biloxi, Biloxi Bay, Mississippi
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Biloxi
Click for Map
Wed -- 06:51 AM CST     Sunrise
Wed -- 08:15 AM CST     Moonset
Wed -- 09:58 AM CST     -0.79 feet Low Tide
Wed -- 05:20 PM CST     Sunset
Wed -- 07:01 PM CST     Moonrise
Wed -- 11:19 PM CST     1.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Biloxi, Biloxi Bay, Mississippi, Tide feet
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1.6
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1.4
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1.2
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0.8
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0.5
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0.1
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-0.2
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-0.4
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-0.6
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-0.8
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-0.8
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-0.8
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-0.7
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1.6


Tide / Current Tables for Gulfport, Gulfport Harbor, Mississippi
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Gulfport
Click for Map
Wed -- 06:52 AM CST     Sunrise
Wed -- 08:16 AM CST     Moonset
Wed -- 08:45 AM CST     -0.03 feet Low Tide
Wed -- 05:21 PM CST     Sunset
Wed -- 07:02 PM CST     Moonrise
Wed -- 11:43 PM CST     1.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Gulfport, Gulfport Harbor, Mississippi, Tide feet
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Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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