Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Grand Isle, LA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:31AMSunset 5:56PM Thursday February 22, 2018 4:58 AM CST (10:58 UTC) Moonrise 10:57AMMoonset 12:00AM Illumination 46% Phase: First Quarter Moon; Moon at 7 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- Coastal Waters From Boothville La To Southwest Pass Of The Mississippi River Out 20 Nm- Coastal Waters From Pascagoula Mississippi To Stake Island Out 20 Mile- 340 Am Cst Thu Feb 22 2018
Today..Southeast winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 7 seconds.
Tonight..Southeast winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Slight chance of showers.
Friday..Southeast winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Chance of showers.
Saturday..South winds 15 to 20 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Saturday night..South winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Sunday..Southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Sunday night..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 4 seconds. Showers likely and slight chance of Thunderstorms.
Monday..West winds 10 to 15 knots becoming northeast in the late morning and afternoon. Seas 2 to 4 feet. Dominant period 4 seconds. Showers likely and slight chance of Thunderstorms.
Monday night..East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 340 Am Cst Thu Feb 22 2018
Synopsis..A cold front in northern louisiana and mississippi will become stationary well north of the coast tonight then retreat north Thursday. Another cold front will move off the coast late Sunday but become stationary in the northern gulf Monday before moving north as a warm front 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 220959
afdlix
area forecast discussion
national weather service new orleans la
359 am cst Thu feb 22 2018

Short term
An upper level ridge is currently centered north of the bahamas and
extends into the bay of campeche. It will remain there through the
end of this week. The ridge will expand northwestward slightly today
as a weak shortwave north of the area lifts. This will bring more
subsidence over the area, thus limiting rainfall today. Have trimmed
pops in value and areal coverage to just areas in the northwest
portion of the cwa. From a temp standpoint, no real changes which
means near record highs expected. Blended models remain too cold
while mav mex performing best right now.

The lack of rain today will be a short lived as another weak
shortwave draws moisture north Friday, enhancing shower and
thunderstorm coverage. Increased pops into the 50 to 70% range to
account for this.

Long term
The main upper trough axis currently west of the rockies will
finally lift northeast and race across the midsection of the country
this weekend. This will send a front through the forecast area early
Sunday morning. It still appears that the boundary will stall as it
moves it. Exactly where could range from SW mississippi to just
offshore of the la coast. A line of showers and thunderstorms will
likely accompany this boundary as it moves in. Higher rain chances
persist into Sunday night. Monday's rain chances will depend on if
the front gets nudged offshore or stays put.

The ridge that was north of the bahamas will then shift west towards
the southern gulf of mexico. This may or may not put the CWA in
conducive area for persistent shower and thunderstorm development
early next week. It will be dependent on how close the center is in
proximity to the cwa. The ECMWF suggests close enough to keep most
of the area drier while the GFS is on the wetter side. Additional
differences include timing and latitude of the next trough that
will be moving across the country. Such large difference in model
solutions decreases extended forecast confidence which led to making
few changes.

Meffer

Aviation
Ceilings will be mainly at bkn030-040 with some sct as well. Tempo
ceilings this morning at bkn003-006 for those terminals down wind of
cooler water bodies and the mississippi river. Vis restrictions
could be as low as 1sm for these terminals as well. Any low ceilings
will break up by mid morning. Tonight may have a bit more fg for
those near the cooler water bodies as ceilings may fall to ovc001
and ifr or worse vis at times since wind speeds may be a little
lower tonight.

Aviation Occasional MVFR to ifr conditions due to ceilings and or
fog restricted vsbys can be expected overnight and through the
early mid morning hours Thursday... With locally lifr category
conditions possible at times at the more coastal terminals.

Conditions will improve toVFR Thursday afternoon before lowering
back into the MVFR category Thursday evening. 11

Marine Onshore flow will continue into the weekend and then the
front will try to slide to the coast Sunday night but will likely
stall until it gets another surge south Monday evening. Winds will
finally become offshore late Monday but this will be short lived as
onshore flow will return by midday Tuesday. Cab

Decision support dss code: green.

Deployed: none.

Activation: none.

Activities: none.

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 83 65 79 66 20 20 60 30
btr 84 67 81 66 20 20 70 20
asd 82 65 80 67 10 20 50 40
msy 82 67 81 68 10 20 60 40
gpt 78 63 77 66 10 10 50 30
pql 81 62 78 66 10 10 40 30

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 mi40 min SE 4.1 G 7 70°F 74°F1024.3 hPa
KXPY 10 mi23 min SE 7 73°F 72°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi93 min SSE 16 G 18 75°F 4 ft1023.1 hPa
KDLP 27 mi23 min NE 7 72°F 72°F
SPLL1 - South Timbalier Block 52, LA / CSI06 32 mi118 min SE 12 G 13
BURL1 - Southwest Pass, LA 39 mi58 min SSE 18 G 18 74°F 1024.3 hPa70°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi40 min SSE 6 G 8 69°F 48°F1024.8 hPa
PILL1 42 mi40 min SE 5.1 G 6 70°F 47°F1024.5 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi40 min ESE 2.9 G 5.1 72°F 73°F1024.2 hPa

Wind History for Grand Isle, LA
(wind in knots)    EDIT      (on/off)   Help
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Last
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SE6
G9
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G11
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G12
SE7
G11
SE6
G10
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G15
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SE5
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1 day
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SE7
G11
SE10
G15
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G14
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G13
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G12
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G12
SE6
G10
S6
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G11
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E4
G8
SE3
G6
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G9
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G10
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G7
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G12
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2 days
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S4
SW3
SE1
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G9
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G7
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G12
S7
G11
S6
G11
SE8
G11
SE7
G11
SE4
G8
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G8
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G7
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G10
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G14
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G12
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G14
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G11
SE7
G11
SE8
SE8
G13
SE9
G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA10 mi63 minSE 65.00 miFog/Mist73°F71°F94%1024 hPa
Galliano, South Lafourche Airport, LA20 mi63 minSE 57.00 miFair73°F69°F88%1024 hPa

Wind History from XPY (wind in knots)
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Last 24hrSE11SE7
G13
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G15
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G18
SE13
G19
SE12SE12SE13
G20
SE12
G20
SE13
G18
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SE6SE7SE7SE7SE8SE8SE9SE5SE7SE7SE7
1 day agoSE12
G19
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S11SE9SE9SE11
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SE8S8SE8SE8SE9SE11SE9SE10SE8
G14
2 days agoSE5SE5SE6SE8SE8
G13
SE11S11
G18
S8
G15
SE11SE13SE10
G17
SE9SE8E5SE9SE10
G17
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G14
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SE11SE8SE9
G15
SE8SE9

Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
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Caminada Pass (bridge)
Click for Map
Thu -- 02:58 AM CST     -0.07 feet Low Tide
Thu -- 06:32 AM CST     Sunrise
Thu -- 10:57 AM CST     Moonrise
Thu -- 04:31 PM CST     0.61 feet High Tide
Thu -- 05:54 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-0-0.1-0.1-0.1-000.10.10.20.20.30.40.50.50.60.60.60.60.50.40.30.20.1

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Thu -- 01:41 AM CST     -0.08 feet Low Tide
Thu -- 06:32 AM CST     Sunrise
Thu -- 10:56 AM CST     Moonrise
Thu -- 03:38 PM CST     0.78 feet High Tide
Thu -- 05:54 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.1-0.1-0.1-000.10.20.30.30.40.50.60.70.70.80.80.70.70.60.40.30.20

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 (5,6,7,8)
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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.