Saturday, January25, 2020
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Marine Weather and Tides
Mandeville, LA

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 6:52AMSunset 5:30PM Saturday January 25, 2020 7:24 AM CST (13:24 UTC) Moonrise 7:36AMMoonset 6:21PM Illumination 0% Phase: New Moon; Moon at 0 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- 353 Am Cst Sat Jan 25 2020
Today..North winds 5 to 10 knots becoming south late. Waves 1 foot or less. Dominant period 4 seconds.
Tonight..Southeast winds near 5 knots. Waves less than 1 foot. Dominant period 4 seconds. Chance of showers after midnight.
Sunday..Southeast winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Showers.
Sunday night..East winds 5 to 10 knots becoming north after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers in the evening.
Monday..North winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Monday night..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Tuesday night..Southeast winds 5 to 10 knots becoming northeast after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and isolated Thunderstorms.
Wednesday..Northeast winds 10 to 15 knots. Waves 1 to 3 feet. Dominant period 4 seconds. Slight chance of showers in the morning.
Wednesday 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- 353 Am Cst Sat Jan 25 2020
Synopsis..High pressure will settle over the area tonight and Saturday before moving east Sunday. A low pressure system will move across the coastal waters Sunday. Another low pressure system is expected to affect the coastal waters late Tuesday into Wednesday morning.


7 Day Forecast for Marine Location Near Mandeville, LA
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location: 30.33, -90.08     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 250952 AFDLIX

AREA FORECAST DISCUSSION National Weather Service New Orleans LA 352 AM CST Sat Jan 25 2020

SHORT TERM. Post frontal airmass will move into the area as a surface ridge tracks right along the northern Gulf Coast. Expect mostly clear skies, light winds and mild temps. Highs should be right around normal for this time of year and roughly what was observed yesterday. Increasing clouds from the west this evening and tonight will bring up overnight temps for Sunday morning. These clouds will be coming in response to the next approaching system. This weak open shortwave will be passing across the southern Mississippi Valley midday Sunday, bringing a fairly high chance for mostly showers. Models are in good agreement that a wide swath of light to moderate rain showers will move in Sunday morning and be exiting the CWA by late in the day. Overcast skies throughout the day will keep temps from moderating much. Thus expecting highs to mostly remain in the 50s.

LONG TERM. Zonal flow to start the week should lead to moderating temps without rain. Went with MAV/MEX for forecast highs instead of NBM as the NBM is typically too cool on the return of warmer air. Showers and a few thunderstorms should be returning to the local area mid week as a slightly more amplified trough moves right in the path of the one before it. This progressive pattern of approximately 36 hours between rain events may persist into next weekend.

MEFFER

AVIATION. SKC and excellent VSBY are expected to prevail through most of the day. Beyond 0Z, a mid level cloud deck will be moving in from the West. VFR conditions will prevail even with clouds moving in since they should be around 10kft. West to northwest winds will be mostly around 10 knots or less through tonight and lighter on Saturday.

MEFFER


MARINE. Surface ridge centered just northwest of the coastal waters will track east across central LA, MS, and AL today. This will keep offshore flow persistent, but with a rotation from due north early morning to northeast late in the day. A gradual weakening in wind speeds is likely as well as the center of the ridge closes in on the local area. Higher winds will return as a shortwave passes over the Gulf Coast states and a weak surface low develops in the central Gulf of Mexico. A cold front associated with the shortwave will bring northerly winds back to the coastal waters Monday. Not expecting winds on the backside of this boundary to be strong based on the lack of upper level amplification of the trough. A stronger open wave trough will moving through mid week. This one should bring the return on low-end small craft conditions after it passes through.

MEFFER

DECISION SUPPORT.

DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support for Stennis Space Center. River Flood Warnings

PRELIMINARY POINT TEMPS/POPS. MCB 61 45 56 49 / 0 30 70 40 BTR 64 48 58 50 / 0 50 80 30 ASD 63 46 58 49 / 0 30 80 30 MSY 61 50 60 53 / 0 30 80 30 GPT 60 46 56 50 / 0 20 70 30 PQL 61 43 58 49 / 0 10 60 40

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
NWCL1 - 8761927 - New Canal, LA 21 mi55 min Calm G 1 46°F 56°F1022.2 hPa
FREL1 24 mi55 min Calm G 1 47°F 1021.9 hPa
CARL1 28 mi55 min 49°F
SHBL1 - 8761305 - Shell Beach, LA 39 mi55 min NNE 2.9 G 2.9 49°F 55°F1022.9 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 40 mi55 min W 1.9 G 2.9 40°F 52°F1022.9 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 41 mi55 min Calm G 0 42°F 54°F1023.2 hPa

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA14 mi32 minN 010.00 miFair34°F30°F89%1023.1 hPa
New Orleans, New Orleans Lakefront Airport, LA20 mi32 minSSE 410.00 miFair45°F37°F77%1022.7 hPa
Hammond, Hammond Municipal Airport, LA22 mi50 minN 010.00 miFair34°F33°F100%1023 hPa

Link to 5 minute data for KASD

Wind History from ASD (wind in knots)
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Last 24hrCalmNW54N6N7SW7
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6CalmCalmCalmN4CalmCalmCalmCalmCalmN4CalmCalmCalmCalm
1 day agoE4E3E4SE4E5SE7SE8SE7SE9SE4SE5NE3CalmCalmCalmCalmNW3N3NW66NW7NW5NW7NW3
2 days agoN5NE5NE7E44SE4E6E3E4SE7E6E6E5E4CalmNE4E3E64NE3NE4NE4E5E4

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Sat -- 02:49 AM CST     1.05 feet High Tide
Sat -- 06:53 AM CST     Sunrise
Sat -- 07:34 AM CST     Moonrise
Sat -- 03:00 PM CST     -0.47 feet Low Tide
Sat -- 05:30 PM CST     Sunset
Sat -- 06:21 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.91110.90.80.60.40.20-0.2-0.3-0.4-0.5-0.5-0.5-0.4-0.3-0.2-0.10.10.30.4

Tide / Current Tables for Long Point, Lake Borgne, Louisiana
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Long Point
Click for Map
Sat -- 12:09 AM CST     0.95 feet High Tide
Sat -- 06:52 AM CST     Sunrise
Sat -- 07:33 AM CST     Moonrise
Sat -- 11:33 AM CST     -0.43 feet Low Tide
Sat -- 05:28 PM CST     Sunset
Sat -- 06:20 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.90.70.60.40.2-0-0.2-0.3-0.4-0.4-0.4-0.4-0.3-0.3-0.2-00.10.20.40.50.70.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (8,2,3,4)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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weather_mapweather_map weather_map

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.