Wednesday, April25, 2018 L-36.com


Marine Weather and Tides
Pointe a la Hache, LA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:21AMSunset 7:35PM Wednesday April 25, 2018 1:05 PM CDT (18:05 UTC) Moonrise 3:29PMMoonset 3:49AM Illumination 79% Phase: Waxing Gibbous; Moon at 10 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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GMZ552 Coastal Waters From Port Fourchon La To Lower Atchafalaya River La Out 20 Nm- Coastal Waters From The Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Mile- 1042 Am Cdt Wed Apr 25 2018
Rest of today..North winds 5 to 10 knots becoming west late in the afternoon. Seas 1 to 2 feet. Dominant period 4 seconds.
Tonight..West winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers after midnight.
Thursday..West winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the morning.
Thursday night..Northwest winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 4 seconds.
Friday..Northwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the afternoon.
Friday night..North winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 4 seconds.
Saturday..Northeast winds 10 to 15 knots becoming southeast 5 to 10 knots late in the afternoon. Seas 2 to 4 feet. Dominant period 4 seconds.
Saturday night..South winds 5 to 10 knots becoming northeast after midnight. Seas 1 to 2 feet. Dominant period 4 seconds.
Sunday..East winds 10 to 15 knots. Seas 1 to 2 feet.
Sunday night..East winds 10 to 15 knots. Seas 2 to 4 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1042 Am Cdt Wed Apr 25 2018
Synopsis..A series of weak cold fronts will sweep across the coastal waters through Friday. High pressure will then settle over the coastal waters for the upcoming weekend.

7 Day Forecast for Marine Location Near Pointe a la Hache, LA
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location: 29.43, -89.98     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 250845
afdlix
area forecast discussion
national weather service new orleans la
345 am cdt Wed apr 25 2018
first short wave on the way this morning as it moves through
nebraska. The attendant cold front will move through with some
showers Thursday morning while there is the possibility of some
thunderstorms over the northern most portion of the area as well.

Severe thunderstorm activity, if any, should stay north and east
of our area.

The second short wave will be quick on the heels of this one and
should move through Friday. It is currently located over northern
canada. This will also help keep the area in a rather cool and
mostly dry forecast. This short wave will also be coupled with
some rather cold 500mb temps. There is very little moisture
associated with it, but the strong dynamic lift will cause layer
lifting which in turn causes instability of these layers and high
enough rh levels to produce rainfall. Sounding profiles are
supportive of hail with any thunderstorm activity that is capable
of getting started. So of the two systems, the one having the best
opportunity of having strong or a severe thunderstorm with it will
be the Friday system. While this system is moving through,
stability will increase along with more dry air intrusion. This
will cause thunderstorms to decay as they move through the area
Friday.

Warm air and moisture will begin to return to the area by the
start of the new week. This could lead to some convergent showers
moving in from the gulf by Tuesday and Wednesday. There is some
indication of a large slow moving cold front possibly affecting
the area by the end of next week.

Aviation
Vfr conditions will prevail at the majority of the terminals through
06z. However, at kmcb some light fog could develop around 12z and
push visibilities into MVFR range for an hour or two. After 06z, an
approaching front will bring lower ceilings to most of the
terminals. Expect to see prevailing ifr and MVFR ceilings in place
by 12z tomorrow. Some scattered showers and isolated thunderstorms
should also accompany the frontal passage by 12z tomorrow, but any
visibility restrictions will be short-lived as the convection passes
through quickly. 32

Marine
A passing frontal boundary late tonight and tomorrow should result
in west-northwest winds of 15 to 20 knots and higher seas developing
late tonight into tomorrow morning over the open gulf waters and
sounds. Gradient flow should relax back to around 10 knots by
Thursday night. However, another front will pass through the
coastal waters on Friday. Another surge of stronger northerly winds
of 15 to 20 knots and higher seas will once again develop over the
open gulf waters and sounds for late Friday and Friday night. High
pressure should settle directly over the waters for the weekend, and
winds should turn more variable and drop to 10 knots or less. Seas
should also fall back to 3 feet or less for the weekend. 32

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: sandhill crane nwr outreach support
new orleans navy week support
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; marginal risk severe or excessive rain.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support for slight risk severe or
excessive rain.

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

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

Preliminary point temps pops
Mcb 77 58 71 53 10 60 20 10
btr 81 59 73 54 10 50 20 10
asd 79 62 74 56 0 30 40 10
msy 80 64 74 59 0 30 40 10
gpt 79 64 75 57 0 20 50 10
pql 78 63 75 56 0 20 50 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
GISL1 - 8761724 - Grand Isle, LA 11 mi48 min N 1.9 G 5.1 71°F 71°F1017.3 hPa
KXPY 24 mi31 min NNE 8 75°F 52°F
KDLP 31 mi31 min Calm 72°F 61°F
SHBL1 - 8761305 - Shell Beach, LA 34 mi48 min NNE 1.9 G 2.9 68°F 74°F1017.1 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 34 mi150 min Calm G 4.1 76°F 73°F1017.8 hPa
CARL1 36 mi48 min 59°F
LOPL1 - Louisiana Offshore Oil Port, LA 38 mi57 min N 2.9 G 5.1 69°F 1 ft1018.1 hPa
PILL1 42 mi48 min N 7 G 8 68°F 59°F1017 hPa
NWCL1 - 8761927 - New Canal, LA 42 mi48 min NNW 2.9 G 5.1 70°F 72°F1017.2 hPa
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 46 mi48 min N 4.1 G 7 71°F 59°F1017.8 hPa
SPLL1 - South Timbalier Block 52, LA / CSI06 47 mi126 min NNE 4.1 G 6
BURL1 - Southwest Pass, LA 47 mi66 min N 4.1 G 5.1 70°F 1017.5 hPa (-0.7)58°F

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA15 mi71 minNNE 410.00 miFair76°F53°F45%1017.6 hPa
Port Fourchon, LA24 mi71 minNE 510.00 miFair75°F53°F47%1017.6 hPa

Wind History from GAO (wind in knots)
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Last 24hrW10
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NW5N9N7NW5CalmCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmN3NE4NE4NE4
1 day agoSW13
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W9W5W4W3W3W5N4CalmCalmCalmCalmCalmCalmNW4NW8N6NW4NW4
2 days agoSW18
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W9W6W3NW10NW7NW9NW7NW5NW5CalmCalmCalmCalmW4NW6W9W11W13
G18

Tide / Current Tables for Manilla, Mississippi River Delta, Louisiana
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Manilla
Click for Map
Wed -- 03:49 AM CDT     Moonset
Wed -- 06:23 AM CDT     Sunrise
Wed -- 07:39 AM CDT     0.09 feet Low Tide
Wed -- 03:29 PM CDT     Moonrise
Wed -- 07:32 PM CDT     Sunset
Wed -- 08:43 PM CDT     0.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.50.40.30.20.20.10.10.10.10.20.20.30.40.40.50.50.60.60.70.70.70.70.7

Tide / Current Tables for Independence Island, Mississippi River Delta, Louisiana
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Independence Island
Click for Map
Wed -- 03:49 AM CDT     Moonset
Wed -- 06:23 AM CDT     Sunrise
Wed -- 06:24 AM CDT     0.09 feet Low Tide
Wed -- 03:28 PM CDT     Moonrise
Wed -- 07:32 PM CDT     Sunset
Wed -- 08:40 PM CDT     0.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.40.30.20.20.10.10.10.10.20.20.30.30.40.40.50.50.50.60.60.60.60.60.6

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (14,3,4,5)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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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.