Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Metairie, LA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:58AMSunset 7:15PM Thursday March 23, 2017 5:31 AM CDT (10:31 UTC) Moonrise 2:58AMMoonset 2:00PM Illumination 18% Phase: Waning Crescent; Moon at 25 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- 346 Am Cdt Thu Mar 23 2017
Today..East winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Tonight..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..Southeast winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Friday night..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Showers and Thunderstorms likely.
Saturday night..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers in the evening.
Sunday..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 346 Am Cdt Thu Mar 23 2017
Synopsis..A storm system developing in the great plains today and Friday will produce strong onshore flow from this afternoon through the weekend.

7 Day Forecast for Marine Location Near Metairie, LA
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location: 30.03, -90.11     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 230844
afdlix
area forecast discussion
national weather service new orleans la
344 am cdt Thu mar 23 2017

Short term
In typical springtime fashion, the area will be impacted every few
days by a new weather system. Starting off with today, an upper
ridge will be passing over the gulf south. This will lead to second
day of near record high temperatures across the forecast area. Mav
guidance was the starting point but increased MAX temps from there
by a few degrees or so.

Friday will be the first of impactful weather to the cwa. An upper
level trough currently moving into southern california will be
racing across the southern rockies Thursday and into the central
plains Friday. A few showers and thunderstorms will begin to develop
over the forecast area ahead of this approaching system. Intensity
and coverage will be quite limited due to minimal instability in
place and precip water value of barely over an inch. As the upper
and surface troughs move closer to the area during the evening and
overnight hours, mid level temps will drop while surface moisture
increases. This will increase instability quite a bit in the mid
levels with relatively steep lapse rates and MLCAPE values over 1000
j/kg. Llvl shear isnt overly impressive at less than 30 knots but
there is some turning with height. All those parameters indicated a
slight risk for severe thunderstorms to develop as the surface
trough moves through. The biggest uncertainty ATTM is timing. The
gfs is about 6 hours quicker than the ecmwf.

The bulk of strong activity should be shifting from western portions
of the CWA to eastern by late morning into the afternoon hours with
showers tapering off Saturday night. Temperatures will cool somewhat
behind the boundary but not expecting a drop of any significance.

Long term...

conditions will be much quieter on Sunday as the trough exits and
weak ridging passing over. Increasing heights will allow
temperatures to rebound with mid 80s returning for the day. This
day of partly cloudy skies will be short lived as a weak trough
races across the southern plains. Strong surface heating and
increasing moisture will lead to afternoon thunderstorm
development Monday over the region. A few strong to possibly
severe storms could be possible.

Tuesday and Wednesday are looking to be on the drier side but a few
stray showers will be possible as subsidence will not be overly
strong.

Meffer

Aviation
Currently, all terminals reportingVFR conditions with the exception
of khum, which is vlifr in fog. Stratus has been slower to develop
this morning. With most areas reporting dew points 5-8 degrees lower
than the last few mornings, fog threat should be considerably lower
this morning. Can't rule out some brief radiation fog around sunrise
in a few locations, but vad wind profiler for klix showing 20 knots
at 1000 feet again, similar to last 2 mornings. Difference being
those winds are out of the east this morning instead of the west.

Any flight restrictions this morning should improve toVFR around
15z. As southeast winds become more established at the surface this
afternoon, low level moisture will begin to increase and expect
clouds to start increasing from southeast to northwest. Likely to
see ceilings in the MVFR range develop during the evening, possibly
lowering to ifr by 06z. 35

Marine
Weak surface high over the northern gulf of mexico to the south of
morgan city is producing light northwest winds across much of the
open waters, but northeast winds occurring along the mississippi
coast early this morning. As western system exits the rockies today,
general gradient wind flow should become southeasterly by afternoon.

With pressure gradient tightening, winds will increase from east to
west. Will raise small craft exercise caution headlines for far
eastern waters plus mississippi and chandeleur sounds from 18z-00z,
and expect that area to expand to all but the tidal lakes overnight
tonight. Headlines, either exercise caution or small craft advisory,
will be necessary for most of the waters into Saturday. Mariners
should also be aware of the potential for one or more lines of
thunderstorms to move through the waters late Friday night into
Saturday. Likely to be a prolonged period of southeast or south
winds over the waters through at least midweek next week, outside of
thunderstorms. 35

Decision support
Dss code: green.

Deployed: none.

Activation: none.

Activities: assessing convective threat for Friday night/Saturday.

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 85 62 79 65 / 0 10 20 70
btr 86 64 80 67 / 0 10 20 70
asd 84 65 78 66 / 0 10 20 30
msy 84 67 81 67 / 0 10 20 40
gpt 81 66 76 66 / 0 10 20 20
pql 83 63 76 63 / 0 10 20 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
NWCL1 - 8761927 - New Canal, LA 0 mi44 min NNW 1 G 2.9 69°F 72°F1020.1 hPa
CARL1 7 mi44 min 54°F
FREL1 17 mi44 min Calm G 1.9 64°F 1019.8 hPa63°F
BYGL1 - 8762482 - Bayou Gauche, LA 23 mi44 min WNW 2.9 G 4.1 66°F 75°F1021.1 hPa
SHBL1 - 8761305 - Shell Beach, LA 26 mi44 min NE 11 G 13 71°F 73°F1020.6 hPa
OSTF1 - Stennis Test Facility 35 mi42 min Calm G 1.9 63°F 1021.4 hPa (+0.0)56°F
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 46 mi44 min ENE 8.9 G 11 66°F 72°F1020.7 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, LA4 mi39 minENE 87.00 miFair70°F66°F87%1020.4 hPa
New Orleans, New Orleans International Airport, LA8 mi39 minN 08.00 miA Few Clouds64°F63°F96%1021.1 hPa
New Orleans, Naval Air Station - Alvin Callender Field, LA15 mi37 minN 010.00 miFair0°F0°F%1020.7 hPa

Wind History from MSY (wind in knots)
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Last 24hrW8W9NW7NW9NW7N9
G16
NW9NW9N9NW6NW6CalmCalmCalmCalmSW6SW4SW3CalmSW3W3CalmNW3Calm
1 day agoSW44W3W3W8W11W10W12W10SW74W9SW6SW6SW8SW7SW7SW8SW7SW6SW5SW3SW3Calm
2 days agoCalmCalmCalmW4W6W5W53SW7SW11W7SW10SW8SW11SW6SW10SW11SW7SW4SW5S3CalmCalmSW4

Tide / Current Tables for New Canal USCG station, Lake Pontchartrain, Louisiana
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New Canal USCG station
Click for Map
Thu -- 03:57 AM CDT     Moonrise
Thu -- 04:08 AM CDT     0.39 feet High Tide
Thu -- 07:00 AM CDT     Sunrise
Thu -- 03:00 PM CDT     Moonset
Thu -- 03:46 PM CDT     0.12 feet Low Tide
Thu -- 07:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.30.40.40.40.40.40.40.30.30.30.20.20.10.10.10.10.10.10.20.20.20.20.3

Tide / Current Tables for Michoud Substation, ICWW, Louisiana
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Michoud Substation
Click for Map
Thu -- 03:56 AM CDT     Moonrise
Thu -- 06:59 AM CDT     Sunrise
Thu -- 10:11 AM CDT     -0.13 feet Low Tide
Thu -- 02:59 PM CDT     Moonset
Thu -- 07:13 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.110.90.80.70.50.30.1-0-0.1-0.1-0.1-0.100.10.30.40.50.60.70.80.911

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 (6,6,7,8)
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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.