Sunday, September19, 2021
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Marine Weather and Tides
Belle Chasse, LA

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 6:46AMSunset 7:01PM Sunday September 19, 2021 8:59 AM CDT (13:59 UTC) Moonrise 5:42PMMoonset 4:19AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 412 Am Cdt Sun Sep 19 2021
Today..East winds 5 to 10 knots becoming south late. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the morning. Showers and Thunderstorms likely early in the afternoon, then chance of showers and Thunderstorms late.
Tonight..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers early in the morning. Chance of Thunderstorms through the day. Showers likely in the late morning and afternoon.
Monday night..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of Thunderstorms in the evening. Slight chance of showers through the night. Slight chance of Thunderstorms after midnight.
Tuesday..West winds near 5 knots. Waves less than 1 foot. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..West winds near 5 knots becoming northwest 10 to 15 knots after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the evening.
Wednesday..North winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers through the day.
Wednesday night..North winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Thursday..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Thursday night..Northeast winds 10 to 15 knots. Waves 1 to 3 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 412 Am Cdt Sun Sep 19 2021
Synopsis..A seabreeze cycle will dominate the waters through Monday. 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 Belle Chasse, LA
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location: 29.78, -90     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 190906 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 406 AM CDT Sun Sep 19 2021

SYNOPSIS.

Upper trough over Louisiana is stuck to the south of a Great Lakes ridge. Northern stream troughs are along the east and west coasts. Some convection over marine areas this morning, but not nearly the amount of coverage compared to the last week or so. Early morning temperatures and dew points remain in the lower and middle 70s.

SHORT TERM (through Tuesday night).

Upper trough currently over Louisiana will gradually shear out over the next few days. Still have abundant deep layer moisture and forcing, so the daily diurnally induced convection will continue, generally commencing over land in the late morning along lake and sea breeze boundaries. As the afternoons progress, the convection will spread further inland, and then dissipate with the loss of heating during the evening. Moisture levels do decrease a bit for Monday and Tuesday, so the areal coverage should gradually shrink over the next couple of days. With precipitable water values remaining near 2 inches today, still a heavy rain threat, but storm motion should be enough to avoid any widespread problems. As areal coverage shrinks Monday and Tuesday, so does the heavy rain threat.

Inversions during the late night hours could aid in fog development the next few mornings, but don't expect it to be wide enough to present significant travel problems.

Regarding temperatures, don't expect much change in overnight lows the next couple of nights. High temperatures today should be fairly similar to yesterday, primarily in the mid 80s, although a few areas that don't get rained on could get a little warmer. Monday, and even moreso Tuesday, with the areal coverage of convection expected to decrease, that may allow temperatures to increase into the upper 80s to around 90. There are still a few Louisiana Parishes with significant utility issues, so there may be a need for Heat Advisories in some of those parishes tomorrow and/or Tuesday. 35

LONG TERM (Wednesday and beyond).

Strong upper level trough extending from the upper Great Lakes region southward will amplify, bringing a cold front down into the area. This front should be moving in Tuesday night or early Wednesday, eventually pushing offshore later in the day, flushing out most of the precipitation chances and bringing cooler temperatures and lower humidity. High temperatures are looking to be in the upper 70s to lower 80s and low temps hovering in the 50s and low 60s from Wednesday afternoon onward.

Upper level ridging and surface high pressure will then begin to build in with an early taste of fall like weather will be in store through at least Saturday. Any significant increase in moisture, and associated rain chances, is unlikely to occur until onshore flow returns, which currently is not anticipated until at least next Sunday. Overall the weather pattern should pleasant and be a welcome respite for the area. -BL/35

AVIATION.

While most terminals were VFR at 08z, there have been a few locations begin to report low stratus. KMCB (IFR) and KBTR (MVFR) were the only ones with ceilings at that time, but cannot rule out IFR or lower conditions at any terminal prior to sunrise. Any flight restrictions should improve to at least MVFR by 15z, with the threat of TSRA increasing after that point. Any convection that does develop over land areas should dissipate near or after sunset.

MARINE.

Outside of the gusty wind and waterspout threat from developing convection, the pattern will remain fairly benign over the coastal waters through Tuesday afternoon. Gradient winds will typically range around 10 knots and seas of 1 to 3 feet are anticipated. However, a strong cold front will sweep through the waters on Wednesday. Winds will quickly shift to the northwest and strong cold air advection over the warmer waters will allow for winds of 15 to 25 knots to mix down to the surface. Seas will also increase to 4 to 7 feet in the open gulf waters and 3 to 5 feet in the sounds and lakes as these winds persist into Thursday. Small craft advisory or exercise caution headlines will likely be necessary from Wednesday through Thursday.

PRELIMINARY POINT TEMPS/POPS. MCB 86 72 86 71 / 80 50 60 10 BTR 86 72 86 71 / 80 30 50 10 ASD 87 73 88 72 / 80 50 60 10 MSY 88 76 89 75 / 80 40 60 20 GPT 86 75 87 74 / 80 50 60 20 PQL 86 74 86 73 / 70 50 60 20

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
CARL1 13 mi60 min 82°F
NWCL1 - 8761927 - New Canal, LA 18 mi60 min E 2.9 G 5.1 78°F 81°F1014.3 hPa (+0.6)
SHBL1 - 8761305 - Shell Beach, LA 18 mi60 min ENE 5.1 G 6 78°F 82°F1015.4 hPa (+0.9)
BYGL1 - 8762482 - Bayou Gauche, LA 22 mi60 min 77°F 80°F1015.2 hPa (+0.9)
GISL1 - 8761724 - Grand Isle, LA 36 mi60 min 1.9 G 5.1 80°F

Wind History for Shell Beach, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans Naval Air Station - Alvin Callender Field, LA4 mi65 minN 010.00 mi0°F0°F%1014.9 hPa
New Orleans, New Orleans Lakefront Airport, LA18 mi67 minE 510.00 miFair79°F75°F88%1014.5 hPa
New Orleans, New Orleans International Airport, LA19 mi67 minENE 310.00 miFair77°F75°F94%1015.3 hPa

Link to 5 minute data for KNBG

Wind History from NBG (wind in knots)
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Last 24hrSE6E6E5SW14CalmCalm--Calm5E5E7SE3SE4SE5SE4SE4CalmCalmCalmCalmCalmCalm--Calm
1 day ago--CalmCalmCalm6SE7S63S9--S6S5SE5SE5SE5E4SE3E4SE3--NE3NE3--E4
2 days agoSE8SE9S8SE8S7SW8S11S8--S9SE10SE9S9S11S7S3S7SE4E5SE5SE5E5E4Calm

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Sun -- 01:43 AM CDT     0.33 feet Low Tide
Sun -- 05:18 AM CDT     Moonset
Sun -- 06:46 AM CDT     Sunrise
Sun -- 02:50 PM CDT     1.35 feet High Tide
Sun -- 06:41 PM CDT     Moonrise
Sun -- 06:59 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.30.40.40.50.50.60.70.80.91.11.21.31.31.41.31.31.21.10.90.80.70.6

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
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Shell Beach
Click for Map
Sun -- 12:45 AM CDT     0.39 feet Low Tide
Sun -- 05:17 AM CDT     Moonset
Sun -- 06:45 AM CDT     Sunrise
Sun -- 02:03 PM CDT     1.59 feet High Tide
Sun -- 06:39 PM CDT     Moonrise
Sun -- 06:58 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.40.50.50.60.70.811.11.21.41.51.61.61.61.51.41.31.110.80.70.7

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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