Sunday, February17, 2019 L-36.com


Marine Weather and Tides
Golden Meadow, 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 6:39AMSunset 5:54PM Sunday February 17, 2019 8:54 PM CST (02:54 UTC) Moonrise 3:52PMMoonset 4:59AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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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GMZ550 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- 359 Pm Cst Sun Feb 17 2019
.small craft advisory in effect from late tonight through late Monday night...
Tonight..South winds 5 to 10 knots becoming north 15 to 25 knots after midnight. Seas 3 to 5 feet. Dominant period 7 seconds. Patchy fog through the night. Chance of showers in the late evening.
Monday..Northeast winds 20 to 25 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 7 seconds. Slight chance of showers in the late morning and afternoon.
Monday night..East winds 20 to 25 knots. Seas 4 to 7 feet with occasional seas to 9 feet. Dominant period 5 seconds. Slight chance of showers.
Tuesday..Southeast winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 7 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Tuesday night..South winds 15 to 20 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Chance of showers and slight chance of Thunderstorms.
Wednesday..South winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Wednesday night..South winds 10 to 15 knots. Seas 3 to 6 feet. Dominant period 7 seconds. Slight chance of showers and Thunderstorms.
Thursday..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Thursday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds. Slight chance of showers and Thunderstorms.
Friday..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Slight chance of showers and Thunderstorms through the night.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 359 Pm Cst Sun Feb 17 2019
Synopsis.. Calm conditions across all marine zones will persist throughout late evening/early tonight, before an approaching cold front form the northwest swings across the area through tomorrow morning. With this front, some spotty showers may be possible, but larger impacts will be in regards to increasing post-frontal winds early Monday morning lasting through Tuesday. In addition, seas averaging 3-5 feet near sounds/near coastal marine zones to 5-7 feet in outer gulf zones may be possible during this time frame. We remain in this active pattern through the rest of the week, with several more opportunities of front passages and associated showers/storms. Klg


7 Day Forecast for Marine Location Near Golden Meadow, LA
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location: 29.13, -90.42     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 172133
afdlix
area forecast discussion
national weather service new orleans la
333 pm cst Sun feb 17 2019

Short term
A cold front pushing into southwest mississippi and east central
louisiana this afternoon will move southeast across the forecast
area through the remainder of the afternoon and during the evening
hours. Currently there is only limited shower activity associated
with the boundary and the coverage is expected to be no better
than scattered through the evening as the boundary progresses
through the area. There is some potential for patchy light to
moderate fog in advance of the front across coastal mississippi,
coastal areas of southeast louisiana, and the adjacent coastal
waters. Any fog that does develop dissipate after the frontal
passage this evening. Cooler air will push into the region in the
wake of the front and will persist across the area through
Monday. Some light showers will be possible across mainly coastal
areas Monday. 11

Long term
An overall wet pattern will prevail through the remainder of the
work week and into next weekend. There will be the potential for
heavy rain... Especially across southwest mississippi... And
possibly even some severe weather. Southwesterly flow aloft will
prevail during the period while a couple of potent short wave
troughs move out of the western CONUS and into the central u.S.

During the week. In addition, a number of impulses embedded in the
southwesterly flow will traverse the lower mississippi valley
while a nearly stationary frontal boundary becomes positioned across
the area. It still appears that the main axis of the heaviest
rain will be to the north of the forecast area during the week;
however, periods of heavier rain are still expected across the
local forecast area... Especially across southwest mississippi
and possibly east central louisiana where 3 or 5 inches are
not out of the question through the course of the week. The Tuesday
night into Thursday time frame is of concern as the potential for
heavier rain and possibly even severe weather will exist.

Precipitable water values are forecast to approach 1.9 inches
by Wednesday ahead of a short wave trough that will be moving
across the central conus. Forecast soundings indicate increasing
instability and shear by late Tuesday night and into Wednesday.

There may be a bit of a lull in the convection for the end of the
work week before another strong short wave trough moving out of
the west impacts the region. This system will bring convection to
the forecast area Saturday and Saturday night before finally pushing
the frontal boundary and moisture to the east of the area. 11

Aviation
Relatively calm conditions continue this afternoon across all
terminals, leading to widespreadVFR conditions with the exception
of few intervals of MVFR due to low clouds. However, this will be
short lived as a cold front with light showers will swing through
the area later this evening tonight. Timing will vary as the front
and associated wind shift passes through from west to east. However,
periods of light showers with this front may likely knock flight
categories to MVFR ifr, with gusty winds following the frontal
passage later tonight. Also, it is important to note that some
patchy areas of fog may develop out ahead of the front across
coastal ms roughly between 00z and 04z, but should not cause major
impacts to coastal ms terminals at this time. Conditions dry out
thereafter through early to mid Monday morning, with a dominant,
post-frontal N to nne wind and becoming gusty at times throughout
the day tomorrow. Klg

Marine
Expect calm conditions across all marine zones early this afternoon
and evening, right ahead of an approaching cold front pushing in
form the northwest. This front and associated showers will swing
through the overnight hours, before pressing well south into the
outer gulf marine zones mid morning tomorrow. Following the frontal
passage, a prominent wind shift and increase in winds can be
expected as we transition into a slightly cooler, post frontal
airmass. Taking a look at the latest model guidance this afternoon,
support does exist for a small craft advisory, which is in effect
from 09z Mon (3am cst Monday morning) to 12z Tue (6am cst Tuesday
morning). Decided to only extend the tidal lakes of SE la and near
coastal ms only though 1800z (noon Monday) as winds attempt to
tamper off a bit thereafter, but will likely need to be extended
again. However, within this time frame, winds gusts ranging from
fresh to strong breeze will build seas to around 3 to 5 feet, with 5
to 7 feet for the outer gulf waters. By Tuesday through Wednesday,
all eyes focus on the next storm system developing to our west,
which will allow for winds to transition back to the south once
again and become onshore. Another cold front with associated showers
and even a few strong severe thunderstorms can be expected in this
time frame, especially during the day on Wednesday. Late week will
remain relatively active, some of the latest long-range guidance
suggesting this next cold front stalling and returning back north
yet again which will keep southerly winds and shower storm chances
in place through atleast next weekend. Klg

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: river flood warnings and sm
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 rain; direct tropical threats; events of national
significance.

Preliminary point temps pops
Mcb 44 61 47 63 50 10 50 50
btr 47 62 50 68 50 10 40 40
asd 53 64 52 68 50 20 20 50
msy 53 62 56 70 40 20 20 50
gpt 53 63 54 66 50 10 20 50
pql 55 64 54 67 40 10 20 50

Lix watches warnings advisories
La... None.

Gm... Small craft advisory from 3 am Monday to 6 am cst Tuesday for
gmz536-538-550-552-555-557-570-572-575-577.

Small craft advisory from 3 am to noon cst Monday for gmz530-532-
534.

Ms... None.

Gm... Small craft advisory from 3 am Monday to 6 am cst Tuesday for
gmz538-550-552-555-557-570-572-575-577.

Small craft advisory from 3 am to noon cst Monday for gmz532-534.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KXPY 12 mi19 min ESE 4.1 70°F 70°F
SPLL1 - South Timbalier Block 52, LA / CSI06 18 mi114 min SE 6 G 7 70°F
GISL1 - 8761724 - Grand Isle, LA 26 mi36 min ESE 4.1 G 6 66°F 65°F1011.6 hPa
LOPL1 - Louisiana Offshore Oil Port, LA 27 mi60 min S 5.1 G 6 69°F 3 ft1012.1 hPa67°F
BYGL1 - 8762482 - Bayou Gauche, LA 46 mi36 min S 1.9 G 2.9 72°F 69°F1011 hPa
KDLP 46 mi19 min N 5.1 68°F 66°F

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA12 mi59 minESE 35.00 miFog/Mist70°F69°F100%1011.2 hPa
Galliano, South Lafourche Airport, LA23 mi59 minSSE 35.00 miOvercast with Haze72°F66°F84%1010.8 hPa

Wind History from XPY (wind in knots)
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Tide / Current Tables for Pelican Islands, Timbalier Bay, Mississippi River Delta, Louisiana
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Pelican Islands
Click for Map
Sun -- 04:58 AM CST     Moonset
Sun -- 06:38 AM CST     Sunrise
Sun -- 09:01 AM CST     -0.63 feet Low Tide
Sun -- 03:51 PM CST     Moonrise
Sun -- 05:52 PM CST     Sunset
Sun -- 09:49 PM CST     1.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.30-0.2-0.4-0.5-0.6-0.6-0.6-0.5-0.4-0.2-00.20.40.60.80.91.11.21.21.2

Tide / Current Tables for Timbalier Island, Timbalier Bay, Mississippi River Delta, Louisiana
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Timbalier Island
Click for Map
Sun -- 04:58 AM CST     Moonset
Sun -- 06:39 AM CST     Sunrise
Sun -- 06:58 AM CST     -0.64 feet Low Tide
Sun -- 03:52 PM CST     Moonrise
Sun -- 05:53 PM CST     Sunset
Sun -- 07:42 PM CST     1.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.2-0-0.2-0.4-0.5-0.6-0.6-0.6-0.5-0.4-0.2-00.20.40.60.811.11.21.21.21.10.9

Weather Map and Satellite Images
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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 (21,6,7,8)
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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.