Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Grand Isle, LA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:31AMSunset 7:33PM Saturday August 24, 2019 12:05 AM CDT (05:05 UTC) Moonrise 12:00AMMoonset 1:35PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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:201908241630;;115146 Fzus54 Klix 240342 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 1042 Pm Cdt Fri Aug 23 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. Gmz550-552-241630- 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 Pm Cdt Fri Aug 23 2019
Rest of tonight..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Saturday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms in the morning, then showers and Thunderstorms likely in the afternoon.
Saturday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Showers and Thunderstorms.
Sunday night..Southwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Monday..Southwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday..Southwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the morning, then showers and Thunderstorms likely in the afternoon.
Tuesday night..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms after midnight.
Wednesday..Southwest winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Wednesday night..West winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1042 Pm Cdt Fri Aug 23 2019
Synopsis..Weak extension of bermuda high pressure area across the northeast gulf of mexico will persist through the weekend. An unsettled pattern will provide periods of Thunderstorms over the coastal waters through 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 232109
afdlix
area forecast discussion
national weather service new orleans la
409 pm cdt Fri aug 23 2019

Short term
More rain is expected across the region this weekend. A broad
low over northwest gulf of mexico will continue to move north
bringing deep tropical moisture over the area. That is moving
north. This has already brought a surge of deep tropical moisture
into southeast louisiana and south mississippi with precipitable
water (pw) values running in the 2 to 2.3 inch range. This
moisture will remain in place through the weekend and into Monday.

The weather prediction center maintains a marginal risk of
excessive rainfall along the coast this evening. For Saturday, a
small portion of the coast will be in a slight risk of excessive
rainfall and other areas in a marginal risk. Heavy rainfall will
be possible with any convection over the next few days. The
potential for banded storms and training storms over areas that
have saturated soils pose a greater risk for flash flooding. A
shortwave will be moving southeast from the central and southern
plains into the lower mississippi valley Sunday and this should
help pull this disturbance over the immediate forecast area. This
will maintain deep tropical moisture and a favorable environment
for fairly widespread rainfall and a threat of locally heavy
rainfall. The entire forecast area is in a marginal risk of
excessive rainfall on Sunday and Sunday night. We will have to
watch to see if the risk areas are updated or expanded for Sunday,
and also will have to watch to see if they could be extended into
Monday especially across the eastern portions of the area.

Long term
A wet pattern continues into next week. Afternoon convection will
continue each day. A frontal boundary will start to approach the
region from the north. This should serve to trigger more
convection during this time period. Guidance suggests that the
boundary will get through the area. We will have to monitor the
forecast for changes. Just expect temperatures to not be as hot
with increased rain chances.

Aviation
Expect showers to diminish over the next few hours across the
area. Expect mostly MVFR toVFR conditions to prevail overnight
into Saturday. Afternoon convection will once again play a role in
the forecast as more widespread coverage for Saturday is
expected.

Marine
No significant changes to the forecast this afternoon which is
basically light onshore winds and low seas outside of convection.

The air mass will become increasingly more conducive for tropical
funnel and waterspout formation in the near shore waters, near
shore marshes and tidal lakes bays through the weekend. Expect
nocturnal convection each night over the waters through next week.

Decision support
Dss code: yellow.

Deployed: none.

Activation: none.

Activities: marginal risk excessive rainfall Sunday.

Marginal to slight risk 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; 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 72 88 72 88 20 70 40 80
btr 74 88 74 88 20 70 40 80
asd 73 90 73 89 20 70 40 80
msy 77 89 77 89 20 70 40 80
gpt 74 89 74 88 20 70 40 80
pql 73 92 74 91 20 70 40 80

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 7 mi47 min SE 2.9 G 6 86°F
KXPY 10 mi30 min SE 6 84°F 79°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi33 min SSE 11 G 13 83°F 2 ft1015.1 hPa74°F
SPLL1 - South Timbalier Block 52, LA / CSI06 32 mi125 min ESE 12 G 13 85°F
BURL1 - Southwest Pass, LA 39 mi65 min ENE 7 G 8
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi47 min SE 7 G 9.9
KMDJ 41 mi30 min SE 11 84°F 77°F
PILL1 42 mi53 min ESE 1.9 G 4.1 81°F 87°F1015.2 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi53 min SE 2.9 G 4.1 80°F 86°F1014.7 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA10 mi3.2 hrsESE 510.00 miFair84°F78°F84%1015.2 hPa
Galliano, South Lafourche Airport, LA20 mi3.2 hrsN 010.00 miFair79°F77°F94%1015.2 hPa

Link to 5 minute data for KXPY

Wind History from XPY (wind in knots)
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Last 24hrS5S5--S7S4SW5SW4S5SW14
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W6W6CalmCalmSE653E7W7SE4SE4SE5----SE6
1 day ago--S4------SE4E4SE5S35SE6SE6SW6CalmSE75SE8
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2 days agoS3----CalmS3S4S4--S4S4S7SE6
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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
Sat -- 12:36 AM CDT     Moonrise
Sat -- 06:26 AM CDT     1.06 feet High Tide
Sat -- 06:33 AM CDT     Sunrise
Sat -- 02:34 PM CDT     Moonset
Sat -- 05:54 PM CDT     0.16 feet Low Tide
Sat -- 07:31 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.80.80.9111.11.1110.90.80.60.50.40.30.20.20.20.20.20.30.40.5

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Sat -- 12:35 AM CDT     Moonrise
Sat -- 05:21 AM CDT     1.34 feet High Tide
Sat -- 06:33 AM CDT     Sunrise
Sat -- 02:34 PM CDT     Moonset
Sat -- 04:35 PM CDT     0.24 feet Low Tide
Sat -- 07:30 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.11.21.31.31.31.31.31.21.10.90.80.60.50.40.30.20.20.30.30.40.50.70.8

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (1,6,7,8)
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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.