Thursday, March21, 2019 L-36.com


Marine Weather and Tides
Lafitte, 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 7:01AMSunset 7:13PM Thursday March 21, 2019 11:22 AM CDT (16:22 UTC) Moonrise 7:09PMMoonset 6:42AM Illumination 100% Phase: Full Moon; Moon at 15 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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GMZ538 Expires:201903220430;;704493 Fzus54 Klix 211539 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 1039 Am Cdt Thu Mar 21 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. Gmz536-538-220430- Chandeleur Sound-breton Sound- 1039 Am Cdt Thu Mar 21 2019
Rest of today..Northwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Tonight..Northwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..Northeast winds 5 to 10 knots becoming south late in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds.
Friday night..Southwest winds 5 to 10 knots becoming north after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Saturday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Sunday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..South winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday..Southwest winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Monday night..West winds 10 to 15 knots becoming northwest 15 to 20 knots after midnight. Waves 3 to 5 feet. Dominant period 4 seconds. Slight chance of Thunderstorms in the evening. Chance of showers through the night.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1039 Am Cdt Thu Mar 21 2019
Synopsis..High pressure will build over the central gulf coast region through Friday then move slowly east through Monday. A cold front is expected to move through the coastal waters Monday night.


7 Day Forecast for Marine Location Near Lafitte, LA
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location: 29.54, -90.06     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 210904
afdlix
area forecast discussion
national weather service new orleans la
404 am cdt Thu mar 21 2019

Synopsis
Latest surface analysis revealed a cold front extending from ohio
valley to central alabama to north part of lake pontchartrain to
southwest louisiana coastal waters. A pre-frontal trough with
windshift to the northwest was located 50 miles ahead of the
front. Northwest winds of 5 to 10 mph were noted across the north
half of the forecast area and mississippi coast, slightly
stronger wind speeds over tide lakes. Upper air analysis showed a
trough axis from the great lakes region to northeast gulf. An
upper level low was over lake michigan with an associated
embedded axis from lake michigan to southeast missouri. All upper
lever features created a northwest flow over louisiana and
mississippi this morning.

Discussion
Cold front will push through the rest of the forecast area this
morning. Northwest winds will lower 1000 to 700mb thickness layer
from 2925m to 2900m, a general 25m drop this morning but
rebounds increases this afternoon. This should not affect the
slow warming trend today through the weekend. The main trough axis
will slide east and heights to increase through the rest of the
week, eventually the upper level ridge will over the mississippi
valley over the weekend. All in all, weather will remain dry and
spring like.

The pacific storm over the california will track across the
rockies today through Saturday becoming negatively tilted over the
kansas Saturday. Moisture will pool along over the southern
plains ahead of the associated through axis. The early tilt will
slow the progression of the system approaching our forecast area.

So think rain threat will hold til Monday. As this system tracks
northeast then east, additional systems in the northern stream
will dive southeast across the great lakes and ohio valley and
push and focus the moisture and instability over the forecast area
on Monday. More showers than thunderstorms are expected and
dynamics should remain north as severe weather not expected at
this time. Dry weather should return next Tuesday through
Thursday.

Aviation Vfr conditions for both ceilings and visibilities will
prevail at all terminals during the forecast period. A few mid to
high level clouds may pass through the area. Additionally, a fast
moving weak cold front currently passing through the area will shift
winds to a more westerly direction. -bl

Marine A weak cold front is currently working its way towards the
coast into overnight. The front is moving at a fairly fast pace
which is increasing some of the wind speeds over the coastal waters
as well as a wind shift in its wake. Because of this there is a
small window this morning where the speeds could hit small craft
exercise caution criteria. Both knew and shbl1 has reported winds
above 15 knots shortly after the front passed their location. After
this morning the winds should relax. High pressure will continue to
hold in the area with light winds until Friday night as it moves
eastward. Next chance of showers storms will be on Monday as a more
significant front is forecasted to pass the area. -bl

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: river flood warnings
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 71 43 73 44 0 0 0 0
btr 71 44 75 48 0 0 0 0
asd 70 43 72 44 0 0 0 0
msy 69 49 71 51 0 0 0 0
gpt 69 47 69 47 0 0 0 0
pql 70 43 71 44 0 0 0 0

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 20 mi34 min NNE 8.9 G 12 59°F 59°F1023.1 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 26 mi34 min NNE 1.9 G 4.1 62°F 61°F1023.2 hPa
CARL1 27 mi34 min 51°F
KXPY 30 mi27 min 61°F 39°F
SHBL1 - 8761305 - Shell Beach, LA 31 mi34 min NNW 6 G 7 56°F 63°F1022.7 hPa
NWCL1 - 8761927 - New Canal, LA 34 mi34 min WNW 1.9 G 4.1 56°F 59°F1022.7 hPa
KDLP 40 mi27 min WNW 6 57°F 45°F
FREL1 44 mi34 min E 1.9 G 2.9 59°F 1021.9 hPa
LOPL1 - Louisiana Offshore Oil Port, LA 45 mi76 min NNE 13 G 18 56°F 3 ft1023.1 hPa41°F
PILL1 49 mi34 min N 11 G 13 56°F 50°F1022.4 hPa

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA13 mi47 minN 610.00 miFair62°F41°F48%1023 hPa
New Orleans Naval Air Station - Alvin Callender Field, LA20 mi27 minNNE 910.00 miA Few Clouds63°F41°F45%1022.4 hPa

Wind History from GAO (wind in knots)
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Last 24hrNE7NE5N4CalmN5CalmNE3NE3CalmCalmCalmCalmCalmS3CalmW5W6W7NW4N4N4CalmN4N5
1 day agoNE7
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NE5NE6NE6NE5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N4N4N3NE4
2 days agoNE6NE7NE7NE10
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NE5NE6NE4NE4NE3CalmNE4NE4NE4NE5NE5NE5NE7NE6NE5NE6NE6NE8NE9
G15
NE6

Tide / Current Tables for Manilla, Mississippi River Delta, Louisiana
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Manilla
Click for Map
Thu -- 01:23 AM CDT     0.62 feet High Tide
Thu -- 07:02 AM CDT     Sunrise
Thu -- 07:41 AM CDT     Moonset
Thu -- 11:21 AM CDT     0.27 feet Low Tide
Thu -- 01:37 PM CDT     0.30 feet High Tide
Thu -- 07:11 PM CDT     Sunset
Thu -- 08:08 PM CDT     Moonrise
Thu -- 09:01 PM CDT     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Independence Island, Mississippi River Delta, Louisiana
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Independence Island
Click for Map
Thu -- 01:20 AM CDT     0.56 feet High Tide
Thu -- 07:02 AM CDT     Sunrise
Thu -- 07:41 AM CDT     Moonset
Thu -- 10:07 AM CDT     0.24 feet Low Tide
Thu -- 01:34 PM CDT     0.28 feet High Tide
Thu -- 07:11 PM CDT     Sunset
Thu -- 07:47 PM CDT     0.18 feet Low Tide
Thu -- 08:08 PM CDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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 (12,3,4,5)
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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.