Monday, March18, 2019 L-36.com


Marine Weather and Tides
Grand Isle, LA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:05AMSunset 7:11PM Monday March 18, 2019 10:29 AM CDT (15:29 UTC) Moonrise 3:45PMMoonset 4:30AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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 Expires:201903190315;;558568 Fzus54 Klix 181437 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 937 Am Cdt Mon Mar 18 2019 Pascagoula To Atchafalaya River Out To 60 Mile Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest Ten Percent Of The Waves. Gmz550-552-190315- 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- 937 Am Cdt Mon Mar 18 2019
.small craft advisory in effect until 3 pm cdt this afternoon...
Rest of today..Northeast winds 20 to 25 knots. Seas 3 to 6 feet with occasional seas to 7 feet. Dominant period 5 seconds.
Tonight..Northeast winds 15 to 20 knots. Seas 3 to 6 feet. Dominant period 4 seconds.
Tuesday..Northeast winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 7 feet. Dominant period 7 seconds.
Tuesday night..Northeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds.
Wednesday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 6 seconds.
Wednesday night..North winds 5 to 10 knots. Seas 3 to 5 feet. Dominant period 6 seconds.
Thursday..North winds near 10 knots. Seas 3 to 5 feet. Dominant period 7 seconds.
Thursday night..North winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
Friday..East winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
Friday night..East winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 937 Am Cdt Mon Mar 18 2019
Synopsis..High pressure moves in the area for the first part of the week. A weak cold front will pass into the coastal waters Tuesday morning followed by another one Wednesday night. High pressure then returns for the rest of the week.


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 180921
afdlix
area forecast discussion
national weather service new orleans la
421 am cdt Mon mar 18 2019

Short term
A few reinforcing fronts will move through the area over through
Wednesday but will be dry. There is a slight possibility of a
shower with the front that moves through Wed night into Thursday
morning. But for the most part, all areas should stay dry through
much of Saturday. These weak reinforcing boundaries will not even
be capable of shifting wind direction to any great extent. Winds
will begin to shift to more of an easterly component by Friday and
moisture will begin to stream into the area for the weekend
frontal system. Models are in a great amount of disagreement at
the moment about when and how strong this front will move through.

The milder GFS brings some sh TS ahead of and along the boundary
Sunday while the euro brings a much more dynamic fronatal system
through Monday into Monday night with strong and severe
thunderstorms. At the moment, this time frame is too far along to
give any high confidence in which solution would fit best. But, as
far as climatology is concerned, we are in severe weather season
and the euro would seem to fit that scenario.

Aviation Vfr conditions are at all terminals right now and
expected to prevail for the forecast period. Mid to high level
clouds will increase in coverage today then decrease later tonight.

-bl

Marine High pressure builds in the area and expected to stick
around for most of the week. A weak and dry cold front passage has
increased winds behind it and small craft advisory conditions will
persist for today for the coastal waters small craft exercise
caution for the lakes and sounds. Winds will continue to be strong
and may require an extension on the current advisory or a exercise
caution for the coastal waters. Winds speeds will relax Wednesday
and should remain for the rest of the work week. -bl

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: river flood warnings small craft advisories
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, or direct tropical threats; events of national significance.

Preliminary point temps pops
Mcb 68 45 64 39 0 0 0 0
btr 68 47 67 41 0 0 0 0
asd 68 47 66 43 0 0 0 0
msy 66 52 65 48 0 0 0 0
gpt 68 47 65 44 0 0 0 0
pql 69 45 65 43 0 0 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory until 3 pm cdt this afternoon for gmz536-
538-550-552-555-557-577.

Small craft advisory until 6 pm cdt this evening for gmz570-572-
575.

Ms... None.

Gm... Small craft advisory until 3 pm cdt this afternoon for gmz538-
550-552-555-557-577.

Small craft advisory until 6 pm cdt this evening for gmz572-575.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi48 min ENE 9.9 G 14 57°F 60°F1024.4 hPa
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi55 min ENE 20 G 26 60°F 3 ft1024.1 hPa46°F
KDLP 27 mi35 min 2.9 63°F 46°F
SPLL1 - South Timbalier Block 52, LA / CSI06 32 mi90 min NE 18 G 24 61°F
BURL1 - Southwest Pass, LA 39 mi90 min NE 18 G 20 58°F 1022.8 hPa (+1.3)46°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi42 min NE 17 G 19
PILL1 42 mi42 min ENE 8 G 15 59°F 49°F1024.1 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi42 min NNE 2.9 G 8 56°F 62°F1025.4 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA20 mi35 minNE 1010.00 miFair55°F40°F59%1024.7 hPa

Wind History from XPY (wind in knots)
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Last 24hrSE5SE8SE7SE6SE6SE7SE4S4SE7SE6E6SE4SE6SE6SE5SE6E4E4SE3SE5S6S9S8S5
1 day agoSE11S11
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S8S3SE5S6S7S8S7S8SW5S3CalmE3E4E8E5SE5SE5SE7SE6SE5
2 days agoS10S10S8SE6SE6SE6SE7SE7SE6SE5
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Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
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Caminada Pass (bridge)
Click for Map
Mon -- 05:29 AM CDT     Moonset
Mon -- 07:06 AM CDT     Sunrise
Mon -- 08:37 AM CDT     -0.23 feet Low Tide
Mon -- 04:44 PM CDT     Moonrise
Mon -- 07:10 PM CDT     Sunset
Mon -- 10:30 PM CDT     0.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.50.30.20-0.1-0.2-0.2-0.2-0.2-0.1-0.100.10.20.30.40.50.60.70.80.80.8

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Mon -- 05:29 AM CDT     Moonset
Mon -- 07:06 AM CDT     Sunrise
Mon -- 07:32 AM CDT     -0.11 feet Low Tide
Mon -- 04:44 PM CDT     Moonrise
Mon -- 07:09 PM CDT     Sunset
Mon -- 09:10 PM CDT     1.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.50.30.20-0.1-0.1-0.1-0.1-00.10.20.30.40.60.70.80.911.11.11.11

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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Wind Forecast for New Orleans/Baton Rouge, LA (11,2,3,4)
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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.