Monday, May22, 2017 L-36.com


Marine Weather and Tides
Grand Isle, 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 6:01AMSunset 7:52PM Monday May 22, 2017 4:32 PM CDT (21:32 UTC) Moonrise 2:50AMMoonset 3:30PM Illumination 8% Phase: Waning Crescent; Moon at 27 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- 1030 Am Cdt Mon May 22 2017
.small craft exercise caution in effect from 7 pm cdt this evening through Tuesday evening...
Rest of today..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms in the late morning and early afternoon, then showers and Thunderstorms likely late in the afternoon.
Tonight..Southwest winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 5 seconds. Showers and Thunderstorms likely.
Tuesday..Southwest winds 15 to 20 knots. Seas 3 to 6 feet. Dominant period 5 seconds. Showers and Thunderstorms.
Tuesday night..West winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Wednesday..Northwest winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 5 seconds. Slight chance of showers in the morning.
Wednesday night..Northwest winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 6 seconds.
Thursday..Southwest winds near 10 knots. Seas 3 to 5 feet. Dominant period 7 seconds.
Thursday night..South winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Friday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet.
Friday night..South winds 10 to 15 knots. Seas 3 to 5 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1030 Am Cdt Mon May 22 2017
Synopsis..A slow moving cold front will stall near the coast today and Tuesday before moving through the coastal waters Wednesday. An area of low pressure is expected to move east along the frontal boundary on Tuesday.

7 Day Forecast for Marine Location Near Grand Isle, LA
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location: 29.2, -90.05     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 221756
afdlix
area forecast discussion
national weather service new orleans la
1256 pm cdt Mon may 22 2017

Update
Heavier rain and embedded thunderstorms have been slow to advance
east from southeast texas into southern louisiana, and the rainfall
forecast from 7 am to 1 pm had to be reduced dramatically. Like
yesterday, this delay may once again cause more moderate to heavy
rain and some stronger thunderstorms with torrential downpours will
move/develop quickly into the forecast area either later this
afternoon or this evening/tonight. Cloud cover has reduced
instability, but additional slow priming of the atmosphere will take
place, at least over the southeast half of the area, where
temperatures were warming into the upper 70s to near 80. Forecast
updates will be issued shortly. 22/td

Aviation
Most convection well back to the southwest at this time, and
threat of tsra in the short term is fairly low. Kbtr currently
with ifr ceilings and several other terminals with MVFR ceilings,
but the majority are currentlyVFR. Do anticipate that MVFR
ceilings will become prevailing condition at most terminals by
sunset. Will carry vcts after about 03z at all terminals, but once
location of primary development becomes more apparent, amendments
will be necessary to beef up threat. Local ifr conditions will be
likely in thunderstorms. Thunderstorm threat will continue through
18z Tuesday. 35

Prev discussion /issued 920 am cdt Mon may 22 2017/
sounding discussion...

atmospheric conditions are not nearly has 'loaded' as they were
yesterday morning. The precip water has dropped from over 2" to
under 1.7". There is virtually no instability and 2 quite
pronounced dry layers in the bottom 500mb. This means convection
this morning will continue to be fairly weak. Top down saturation
is needed to reduce the dewpoint depressions. As this happens
today, will see a steady uptick in convection coverage and
intensities as pw & instability increases.

Meffer

Preliminary point temps/pops
Mcb 74 63 82 59 / 100 80 60 40
btr 76 64 83 62 / 100 90 60 30
asd 80 64 82 63 / 80 90 80 40
msy 82 68 81 66 / 80 80 80 30
gpt 80 66 80 67 / 70 90 80 40
pql 82 65 80 67 / 70 90 80 50

Lix watches/warnings/advisories
La... Flash flood watch through Tuesday evening for laz034>037-039-040-
046>050-056>072.

Gm... None.

Ms... Flash flood watch through Tuesday evening for msz068>071-077-
080>082.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi44 min SE 1.9 G 4.1 78°F 80°F1014.4 hPa
GRBL1 8 mi92 min SE 4.1 G 6 1014.9 hPa (-1.6)
KXPY 10 mi37 min ESE 5.1 79°F 72°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi84 min ESE 7 G 8.9 77°F 2 ft1013.1 hPa
KDLP 27 mi32 min ESE 5.1 84°F 73°F
SPLL1 - South Timbalier Block 52, LA / CSI06 32 mi92 min E 7 G 8.9
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi44 min SE 4.1 G 5.1
BURL1 - Southwest Pass, LA 39 mi32 min SSE 5.1 G 6 78°F 1014.8 hPa (-1.4)73°F
KMDJ 41 mi37 min SE 6 79°F 73°F
PILL1 42 mi44 min S 5.1 G 5.1 78°F 71°F1014.2 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi44 min ESE 2.9 G 5.1 78°F 81°F1014.5 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA10 mi37 minESE 510.00 miA Few Clouds79°F71°F79%1014.2 hPa
Galliano, South Lafourche Airport, LA20 mi37 minE 310.00 miMostly Cloudy79°F70°F76%1014.2 hPa

Wind History from XPY (wind in knots)
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Last 24hrSE13S8S145S4SE7NW7SE9S7
G13
S17CalmCalmNE5N10N7NE10E8E11E12E11E9E7E6SE5
1 day agoSE12S10S11S11S7S9S8S9S7
G13
S10S7S6S5S5SW4SW5SW6SW5SW7S8S10SE13
G18
E21
G29
E14
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2 days agoE12
G17
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E11SE13SE12
G19
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SE11SE10SE9SE11SE10
G16
SE10SE10SE11SE11SE11SE12

Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
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Caminada Pass (bridge)
Click for Map
Mon -- 01:53 AM CDT     0.37 feet Low Tide
Mon -- 03:50 AM CDT     Moonrise
Mon -- 06:04 AM CDT     Sunrise
Mon -- 10:39 AM CDT     0.63 feet High Tide
Mon -- 04:29 PM CDT     Moonset
Mon -- 07:49 PM CDT     Sunset
Mon -- 08:08 PM CDT     0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.40.40.40.50.50.60.60.60.60.60.60.50.40.40.30.20.20.20.20.20.2

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Mon -- 03:49 AM CDT     Moonrise
Mon -- 06:04 AM CDT     Sunrise
Mon -- 09:10 AM CDT     0.82 feet High Tide
Mon -- 04:29 PM CDT     Moonset
Mon -- 07:15 PM CDT     0.27 feet Low Tide
Mon -- 07:49 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.50.50.60.60.70.70.80.80.80.80.80.70.60.50.50.40.30.30.30.30.30.30.4

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 (17,4,5,8)
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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.