Monday, September20, 2021
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Marine Weather and Tides
Pass Christian, 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 6:42AMSunset 6:56PM Monday September 20, 2021 1:39 AM CDT (06:39 UTC) Moonrise 7:09PMMoonset 6:15AM Illumination 98% Phase: Waxing Gibbous; Moon at 14 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- 1012 Pm Cdt Sun Sep 19 2021
Rest of tonight..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms through the night.
Monday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms through the day.
Monday night..Southwest winds 5 to 10 knots becoming west after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms early in the evening.
Tuesday..West winds 5 to 10 knots becoming southwest in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..West winds 5 to 10 knots becoming northwest 10 to 15 knots after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Wednesday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the morning.
Wednesday night..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Thursday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Thursday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1012 Pm Cdt Sun Sep 19 2021
Synopsis..A seabreeze cycle will dominate the waters through tomorrow. A front will approach the waters on Tuesday and pass through the waters by Wednesday afternoon. High pressure will then build in from the north by Thursday.


7 Day Forecast for Marine Location Near Pass Christian, MS
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location: 30.22, -89.11     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 200503 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1203 AM CDT Mon Sep 20 2021

AVIATION. updated for 06z taf issuance.

PREV DISCUSSION. /issued 333 PM CDT Sun Sep 19 2021/

SHORT TERM (Tonight through Tuesday Night) . An elongated trough axis will linger over the area through tomorrow. This trough axis should shift east of the area on Tuesday allowing a more westerly or zonal flow pattern to take hold for a brief period of time. By Tuesday night, all of the guidance indicates that a strong northern stream trough axis and attendant cold front will begin to sweep through the forecast area.

The atmosphere will remain relatively moist and unstable through the entire short term period. This is evident through precipitable water values ranging from 1.75 to 2 inches and mixed layer CAPE values of around 1000 to 1500 J/KG during the afternoon hours both Monday and Tuesday. The overall convective pattern will be entirely diurnal and any convective development will tend to form along weak mesoscale boundaries like the landbreeze/seabreeze or any pre-existing outflows.

One of the main limiting factors for convective development will be a decrease in upper level forcing as the trough axis pulls to the east and some drier air advecting into the mid-levels. This dry air advection aloft will weaken mid-level lapse rates to around 5.5C/km, so the prospects of deep and sustained updrafts will be lowered. However, a few deeper convective cells and scattered marine layer shower activity is anticipated for both Monday and Tuesday afternoon as the convective in the mid 80s is reached. The decrease in cloud development and rainfall, combined with a more westerly flow pattern will allow for warmer temperatures on Monday and Tuesday. Highs should climb into the upper 80s and possibly lower 90s, and this could push heat index values above 100 in some of the hurricane impacted parishes. Will need to monitor for any heat advisory issuances in parishes with limited power restoration.

The strong northern stream front and upper level trough axis will begin to push through the forecast area Tuesday night, and this front could provide enough low level forcing to keep a risk of isolated to scattered showers and thunderstorms in place through the overnight hours. If any convection forms along the front, it will likely be in the form of a weak line of showers and thunderstorms. Fortunately, directional and speed shear values will be very low and lapse rates will be fairly weak as the front moves through. This will keep any severe risk at bay as the cold front sweeps in. Some cold air advection will likely begin to take hold across Southwest Mississippi and portions of metro Baton Rouge late Tuesday night, and have lows dipping into the middle to upper 60s in these areas.

LONG TERM (Wednesday through Saturday) . The cold front will continue to push through the area and then offshore Wednesday morning, and this will keep some lingering cloud cover and a slight to low end chance of showers and thunderstorms in the forecast for areas mainly along and south of I-10 through the morning hours. By the afternoon, the front will be clearing the coastal waters and a surge of very dry and cooler air will begin to sweep into the region. Deep layer northwest flow and increasing negative vorticity advection will also become the rule by Wednesday afternoon. These conditions will persist through Saturday with clear skies, low humidity, and cooler than normal temperatures forecast through the extended period. The heart of the 925mb thermal trough axis will reside over the region from Thursday through Friday, and this will push high temperatures down into the middle to upper 70s and overnight lows into the 50s and lower 60s. In fact, a few locations may touch the upper 40s if enough cold air drainage down the Pearl and Pascagoula River valleys occurs. Some modification in temperatures is expected by Saturday as the heart of the 925mb thermal trough axis shifts to the east, but readings will continue to run cooler than average.

AVIATION . While all terminals are currently VFR or MVFR, a similar setup like the previous few days are expected where IFR or LIFR conditions are possible due to low ceilings and patchy dense fog is expected early tomorrow morning around 08-12z, especially for terminals along and north of I-12. Afterwards, fog and low ceilings should lift after sunrise and then another batch of diurnal convection in the afternoon hours. -BL


MARINE . Other than the threat of gusty winds and waterspouts from scattered shower and thunderstorm activity, the forecast calls for fairly benign conditions over the coastal waters through Tuesday. Winds will be southwesterly at 5 to 10 knots and seas will generally be 2 feet or less. However, a strong cold front will sweep through the waters on Wednesday. Strong thermal mixing over the warm Gulf waters will allow winds to increase into small craft advisory range of 20 to 25 knots after the front moves through. Seas will respond to these winds and increase to over 6 feet by Wednesday night. These conditions persist into Thursday with some relaxation of the wind field into the 15 to 20 knot range expected by Friday.

PRELIMINARY POINT TEMPS/POPS. MCB 71 87 71 88 / 30 50 30 50 BTR 72 88 72 90 / 30 50 30 50 ASD 73 89 72 88 / 30 50 30 50 MSY 75 88 75 89 / 30 50 30 50 GPT 74 86 74 87 / 30 50 30 50 PQL 73 87 72 88 / 30 50 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
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 14 mi52 min SSW 2.9 G 5.1 80°F 81°F1014.1 hPa
PNLM6 - 8741533 - Pascagoula NOAA Lab, MS 31 mi52 min 79°F
PTBM6 - 8741003 - Petit Bois Island, MS 32 mi52 min SSW 11 G 12 81°F 1014.4 hPa
SHBL1 - 8761305 - Shell Beach, LA 38 mi52 min S 5.1 G 6 76°F 84°F1013.9 hPa

Wind History for Gulfport Outer Range, MS
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gulfport - Gulfport-Biloxi International Airport, MS13 mi47 minS 410.00 miMostly Cloudy78°F74°F87%1013.4 hPa
Keesler Air Force Base / Biloxi, MS18 mi44 minSSW 710.00 miPartly Cloudy77°F72°F84%1013.5 hPa

Link to 5 minute data for KGPT

Wind History from GPT (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmNE4N4NE3NE5E5SE6S8SE7SE11SE10SE8S4S6S8S7S4CalmS4
1 day agoCalmCalmCalmCalmCalmCalmCalmS4SE6SE7SE10
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S9S7S8SE9E4S4CalmSE5E6SE4SE7SE7S4
2 days agoSE6SE10SE4CalmSE3NE4SE9S5SE13S7SE8S11SW7S65S4S4S3S4CalmCalmCalmCalmCalm

Tide / Current Tables for Cat Island (West Point), Mississippi
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Cat Island (West Point)
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Mon -- 06:15 AM CDT     Moonset
Mon -- 06:44 AM CDT     Sunrise
Mon -- 11:05 AM CDT     1.83 feet High Tide
Mon -- 06:54 PM CDT     Full Moon
Mon -- 06:55 PM CDT     Sunset
Mon -- 07:09 PM CDT     Moonrise
Mon -- 09:13 PM CDT     1.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.9111.11.21.31.41.61.71.81.81.81.71.61.51.41.31.21.11111.1

Tide / Current Tables for Ship Island Pass, Mississippi
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Ship Island Pass
Click for Map
Mon -- 06:14 AM CDT     Moonset
Mon -- 06:43 AM CDT     Sunrise
Mon -- 11:07 AM CDT     1.84 feet High Tide
Mon -- 06:54 PM CDT     Sunset
Mon -- 06:54 PM CDT     Full Moon
Mon -- 07:08 PM CDT     Moonrise
Mon -- 08:36 PM CDT     1.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.9111.11.21.31.51.61.71.81.81.81.81.61.51.41.21.11.1111.11.1

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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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