Friday, September24, 2021
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Marine Weather and Tides
Gretna, 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 6:48AMSunset 6:55PM Friday September 24, 2021 8:22 PM CDT (01:22 UTC) Moonrise 8:13PMMoonset 9:04AM Illumination 87% Phase: Waning Gibbous; Moon at 18 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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GMZ530 Lake Pontchartrain And Lake Maurepas- 331 Pm Cdt Fri Sep 24 2021
Tonight..Northeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..Northeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Saturday night..Northeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Sunday..Northeast winds 5 to 10 knots becoming east late in the afternoon. Waves 1 foot or less. Dominant period 4 seconds.
Sunday night..Southeast winds near 5 knots. Waves less than 1 foot. Dominant period 4 seconds.
Monday..Northeast winds 5 to 10 knots becoming east in the afternoon. Waves 1 foot or less. Dominant period 4 seconds.
Monday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Tuesday..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers in the afternoon.
Tuesday night..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Wednesday..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Wednesday night..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Waves or seas subsiding to less than 1 foot. Dominant period 4 seconds after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 331 Pm Cdt Fri Sep 24 2021
Synopsis.. High pressure will remain over the coastal waters through the weekend and into early next week.


7 Day Forecast for Marine Location Near Gretna, LA
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location: 29.95, -90.07     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 242027 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 327 PM CDT Fri Sep 24 2021

SHORT TERM (This evening through Sunday Night).

Another beautiful day full of zero complaints about the weather. Much needed after the past month or two. We will end the day today with dry conditions and mostly clear skies. As expected, only a few patchy cirrus around due to moisture advection in the H2 to H3 layer. Mostly clear and calm tonight. Adjustments to the lows were not as aggressive as Friday morning, riding very close to the deterministic NBM which places many areas in the mid to upper 50's to the low to mid 60's across the southshore and SE LA due to warmer surrounding waters. Only minor attention was given to typical drainage locations across the northshore east to coastal MS placing forecast lows few degrees cooler than guidance.

Saturday is looking beautiful as well, starting the weekend off right. Only some patchy upper-level cirrus persist as moisture advection continues out ahead of an amplifying/digging trough/attendant fast moving surface cold front into the midwestern states. This system quickly pulls east across the northeast and occludes, meanwhile the cold front never pushes far enough south as this boundary aligns parallel with the upper- level flow and undergoes frontolysis. However, this will transition a reinforcing area of high pressure into the area following this system, helping to keep calm/dry conditions going with easterly surface winds. Otherwise, no adjustments were really needed to highs and lows against deterministic NBM, with only some minor tweaks to daily afternoon dewpoints to account for mixing processes. Enjoy! KLG

LONG TERM (Monday through Thursday Night).

Starting of the new work week, the aforementioned reinforcing surface high builds east allowing for more of a southeasterly wind transition at the surface. Moisture return will be slow and shallow initially as it will be fighting such a dry overall tropospheric profile accompanied by strong low to mid-level subsidence anchored in place. Meaning, Monday looks dry with dewpoints starting to creep back into the low to mid 60's. Mid- level altocumulus/upper-level cirrus will be on the increase as moisture advects east from a slow-moving closed off upper-level low spinning across southern Arizona blocked under large-scale ridging in the western US. But, a nice day regardless of these minor details. Tuesday, southeasterly return flow deepens as the surface high and attendant 850mb ridge pulls to the east. Deeper tropospheric moisture content (PW's) and WAA in a veered profile will allow for isolated to scattered showers to break out well to our west across southeastern Texas/western LA. However for here, the dry air will win over again keeping the area dry and calm.

Wednesday and Thursday, this same closed low slowly drifts east, as does the ridge axis eventually amplifying and absorbing/stretching the low along SW to NE flow. Meanwhile messy PVA within a generalized area of upper-level weakness and deep low-level Gulf flow provides widespread showers and storms along the Arklatex region, but struggles pressing east as deep troughing develops over the northeastern states, building upstream upper- level convergence leading to high pressure to dive south across the eastern US - pressing this shower activity just to our west and preventing much of any eastward movement. Complicated? You betcha. But should this could be a trend leaning on more of a drier forecast mid to late-week, especially if this building ridge wins against this plume of moisture to our west. Regardless, one thing worth mentioning is some weak energy/PVA does drift east enough into our area at times, primarily Wednesday through Thursday but with lingering dry air in place in the low-levels, this would be likely stratiform light showers, or virga - just unsure on coverage/intensity or if evaporative cooling can win over in this type of scenario. These are mesoscale questions in a long-term discussion, so will continue to monitor if these trends continue or not before jumping on board with any possible adjustments. KLG

AVIATION (18Z TAF DISCUSSION).

Expect VFR conditions for all area terminals through the forecast period with light surface winds and SKC/FEW250 today and tonight. KLG

MARINE.

Light winds and calm seas will prevail through this weekend and into next week. Eventual wind shift from the east to eventual southeast can be expected early next week, persisting through the rest of the week with very little marine impacts expected over the next 5 to 7 days. KLG

PRELIMINARY POINT TEMPS/POPS. MCB 54 81 58 85 / 0 0 0 0 BTR 54 81 57 84 / 0 0 0 0 ASD 55 83 58 86 / 0 0 0 0 MSY 64 82 65 85 / 0 0 0 0 GPT 57 83 60 85 / 0 0 0 0 PQL 55 82 58 85 / 0 0 0 0

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 4 mi52 min 82°F
NWCL1 - 8761927 - New Canal, LA 6 mi52 min E 1.9 G 2.9 74°F 79°F1016.5 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 22 mi52 min 73°F 79°F1017.6 hPa
SHBL1 - 8761305 - Shell Beach, LA 22 mi52 min SE 5.1 G 5.1 71°F 81°F1017.5 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 47 mi52 min NNE 6 G 7 76°F 77°F1017.5 hPa
GISL1 - 8761724 - Grand Isle, LA 48 mi52 min 6 G 9.9 78°F1017.5 hPa

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans, New Orleans Lakefront Airport, LA7 mi29 minSE 410.00 miFair72°F56°F57%1016.9 hPa
New Orleans Naval Air Station - Alvin Callender Field, LA9 mi27 minSSE 310.00 miA Few Clouds70°F61°F73%1017.3 hPa
New Orleans, New Orleans International Airport, LA10 mi29 minN 010.00 miA Few Clouds71°F59°F66%1017.7 hPa

Link to 5 minute data for KNEW

Wind History from NEW (wind in knots)
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Last 24hrNE12NE11NE14NE14NE14E12E14E14E12E11NE11NE10NE10NE8NE9N10N8N6NW6NW64CalmCalmSE4
1 day agoN23
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N24N23NE20NE19NE17NE19NE18NE18NE17NE16NE16NE15NE9NE10NE6N6Calm4CalmN10N12NE12
2 days agoSW5SW6S4E9S5S5SW6W8NW20N16N19N26N17N21N16
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Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Fri -- 05:05 AM CDT     1.16 feet High Tide
Fri -- 06:49 AM CDT     Sunrise
Fri -- 10:04 AM CDT     Moonset
Fri -- 04:00 PM CDT     0.47 feet Low Tide
Fri -- 06:53 PM CDT     Sunset
Fri -- 09:12 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.9111.11.11.21.21.11.110.90.80.70.60.50.50.50.50.50.60.60.70.80.8

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
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Shell Beach
Click for Map
Fri -- 04:18 AM CDT     1.37 feet High Tide
Fri -- 06:48 AM CDT     Sunrise
Fri -- 10:02 AM CDT     Moonset
Fri -- 03:02 PM CDT     0.55 feet Low Tide
Fri -- 06:52 PM CDT     Sunset
Fri -- 09:11 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.21.31.31.41.41.31.31.210.90.80.70.60.60.60.60.60.70.70.80.911.1

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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