Friday, January19, 2018 L-36.com


Marine Weather and Tides
Mandeville, LA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:53AMSunset 5:26PM Friday January 19, 2018 5:17 PM CST (23:17 UTC) Moonrise 8:36AMMoonset 7:55PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 318 Pm Cst Fri Jan 19 2018
Tonight..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers.
Saturday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Sunday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..Southeast winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers after midnight.
Monday..Southwest winds near 10 knots becoming northwest in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds. Showers and slight chance of Thunderstorms in the morning, then slight chance of showers in the afternoon.
Monday night..North winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Tuesday..Northeast winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday night..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
Wednesday..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
Wednesday night..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 318 Pm Cst Fri Jan 19 2018
Synopsis..High pressure will shift to the east tonight. Southerly flow will develop over the region. Cold near shore waters and warm moist air will create a threat of sea fog Saturday night through Sunday morning and again Sunday night. A cold front will move through the area Monday. A trough will develop over the gulf by mid week. This feature will prolong an easterly flow over the coastal waters from Wednesday through next weekend.

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 192157
afdlix
area forecast discussion
national weather service new orleans la
357 pm cst Fri jan 19 2018

Short term
The upper level trough that brought wintry precip and bitterly cold
temperatures continues to lift northeast. A piece of that trough was
pinched off and is located in texas. Increasing 500mb heights from
the exiting trough and moisture cloud increase from disturbance to
the west will result in significant rises in nighttime lows. Expect
a 15 degree jump in tomorrow lows and highs from today. At the same
time, scattered showers will be possible as this week upper
trough low drifts east across the northern gulf coast. Hrrr precip
output shows light showers pushing into forecast zones along the
atchafalaya basin overnight. Therefore, have introduced slight
chance pops west of a btr to hum line. Moving into Saturday,
guidance is slightly higher than previous solutions but still quite
a bit lower than older runs. Decided to bump up rain chances for
areas west of i-55 but kept them at a halfway point between previous
forecast of 20% and mav met 40%. Additionally, sea fog will likely
become an issue along coastal parishes of la beginning late tonight
as dewpoints rise into the mid 50s. Attm, it appears this will
mainly be limited to areas west of the mississippi river. Ridge will
then build in Sunday which will stunt rain and allow continued
warming. You may think summertime has come early on Sunday compared
to last week when temperatures rise into the low 70s.

Long term
The CWA may be looking at a few thunderstorms at the start of next
week. Models show an upper trough tracking west across the southwest
us Saturday and Sunday. A low will develop at the base of the trough
and race northeast towards the great lakes Monday. This weather
pattern typically brings a relatively thin line of showers with
embedded thunderstorms through. Intensity shouldn't be of much
concern as instability and dynamics will not be very conducive for
vigorous development. Temperatures will likely drop back down behind
the front mid week, but only on the order of 10ish degrees with a
quick rebound by the end of the week.

Meffer

Aviation
Weak upper level wave over east texas will spread moisture amd
ceilings over most terminals from west to east through this evening.

Most will be around ovc080 but will lower to ovc050 this afternoon
for kbtr and khum. These ceilings should remain rather stable at
ovc050-060 through tonight. All terminals will show some possibility
towards observing either -dz or -ra by Saturday morning. At this
time, rain chances remain slight. Therefore, will hold off adding
precip to latter part of the forecast. 18

Marine
High pressure will shift east through tonight bringing return flow
back to the northern gulf tonight into Saturday along with some
rain. Foggy conditions near the coast could develop Saturday night
through Sunday morning and Sunday night ahead of the next cold front
which will move through Monday. A stretch of strong northerly winds
look to occur again behind this front through next Wednesday. A
trough will develop over the gulf by mid week. This feature will
prolong an easterly flow over the coastal waters from Wednesday
through next weekend. 18

Decision support
Dss code: green.

Deployed: none.

Activation: none.

Activities: none.

Decision support services (dss) code legend
green = no weather impacts that require action.

Blue = long-fused watch, warning, or advisory in effect or
high visibility event.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support.

Orange = high impacts; slight to moderate risk severe; nearby
tropical events; hazmat or other large episodes.

Red = full engagement for moderate risk of severe and or
direct tropical threats; events of national significance.

Preliminary point temps pops
Mcb 40 64 51 71 10 20 0 10
btr 41 66 54 72 10 30 10 10
asd 41 65 52 70 10 20 0 10
msy 46 66 55 70 10 20 0 10
gpt 40 63 50 66 10 20 0 10
pql 36 65 48 67 10 10 0 10

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 mi47 min SSE 1 G 5.1 52°F 45°F1024.8 hPa
FREL1 24 mi47 min Calm G 1 49°F 1023.8 hPa33°F
CARL1 28 mi47 min 40°F
SHBL1 - 8761305 - Shell Beach, LA 39 mi47 min E 8 G 9.9 49°F 46°F1024.7 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 40 mi47 min SSE 7 G 8 45°F 44°F1024.5 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 41 mi47 min SE 4.1 G 6 53°F 51°F1024.9 hPa

Wind History for New Canal Station, LA
(wind in knots)    EDIT      (on/off)   Help
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N5
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N15
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N19
G23
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G25
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA14 mi24 minN 010.00 miMostly Cloudy52°F23°F32%1024.7 hPa
New Orleans, New Orleans Lakefront Airport, LA20 mi24 minESE 710.00 miMostly Cloudy50°F33°F52%1024.2 hPa
Hammond, Hammond Municipal Airport, LA22 mi42 minS 510.00 miFair52°F23°F32%1024.7 hPa

Wind History from ASD (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmN4CalmCalmCalmCalmCalmCalmCalmE6CalmCalmCalmS6S8SE7Calm
1 day agoN3N7N5N5N5N4CalmCalmCalmN3N5N4N6CalmN6N10N8N75NW4N43CalmSW4
2 days agoN15
G20
N12
G18
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N11N7N9
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N8N8N7N9N14N12N13
G20
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G22
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G21
N10
G19
N10N11

Tide / Current Tables for Tchefuncta River, Lake Pontchartrain, Louisiana
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Tchefuncta River
Click for Map
Fri -- 06:57 AM CST     Sunrise
Fri -- 08:36 AM CST     Moonrise
Fri -- 08:40 AM CST     0.39 feet High Tide
Fri -- 05:25 PM CST     Sunset
Fri -- 07:55 PM CST     Moonset
Fri -- 07:55 PM CST     -0.25 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-000.10.20.20.30.40.40.40.40.30.30.20.1-0-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.2

Tide / Current Tables for Bayou BonFouca, Route 433, Louisiana
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Bayou BonFouca
Click for Map
Fri -- 06:55 AM CST     Sunrise
Fri -- 08:16 AM CST     0.35 feet High Tide
Fri -- 08:34 AM CST     Moonrise
Fri -- 05:24 PM CST     Sunset
Fri -- 07:05 PM CST     -0.22 feet Low Tide
Fri -- 07:53 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-00.10.10.20.20.30.30.40.30.30.30.20.10-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for New Orleans/Baton Rouge, LA (18,4,5,8)
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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 numerious 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.