Monday, August20, 2018 L-36.com


Marine Weather and Tides
Golden Meadow, LA

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:33AMSunset 7:39PM Monday August 20, 2018 4:07 AM CDT (09:07 UTC) Moonrise 2:37PMMoonset 12:37AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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- 334 Am Cdt Mon Aug 20 2018
Today..Southwest winds 5 to 10 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.
Tonight..Southwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Tuesday..West winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..West winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday..West winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday night..North winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Thursday..Northwest winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Thursday night..Southwest winds near 5 knots becoming west. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Friday..Northwest winds near 5 knots becoming southeast in the late morning and afternoon. Seas less than 1 foot. Slight chance of showers and Thunderstorms.
Friday night..Southeast winds 5 to 10 knots. Seas 1 foot or less. Slight chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 334 Am Cdt Mon Aug 20 2018
Synopsis.. A ridge of high pressure will prevail over the northern gulf of mexico through Tuesday. A cold front will enter the coastal waters early Wednesday.


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 200238
afdlix
area forecast discussion
national weather service new orleans la
938 pm cdt Sun aug 19 2018

Sounding discussion
No issues with the sounding this evening that managed to reach
21.9 miles altitude before bursting over the joyce wildlife
manageamant area on the western shores of lake pontchartrain near
the tangipahoa river. Sounding still looks incredibly moist, even
for mid-august standards, with a precipitable water of 2.33
inches, and only a 5-7 degree dewpoint spread throughout. Winds
s-sw 5-10kt to 7kft, w-nw 10-15 kt to 16kft, then SW 5-10kt to
36kft where winds become calm in a shear zone that sees the winds
ne-e 10-20kt above into the lower stratosphere.

Airmass still appears conducive for efficient rains with chap
output on 358k lift yielding potentials 3.83-6.69 inches,
convective gust 36kt and waterspout environment, which may be in
store Mon morning once land breeze convection gets underway in the
near shore waters toward daybreak. 24 rr

Prev discussion issued 349 pm cdt Sun aug 19 2018
short term...

by the end of today, a majority of the CWA will have received at
least a measurable amount of rainfall. The main ingredient for such
high recent convective coverage is deep layer moisture. Local upper
air soundings have shown a very saturated column with pw's hovering
around 2.2". That number is on par for 90th percentile for this time
of year. In the upper levels, a broad trough exists over the
southeast conus, a second trough draped over the rockies with a weak
ridge between the 2. There has been negligible ridging subsidence
locally to have any limiting impacts on convection. This will
continue to be the case rolling into Monday as the 'rockies trough'
deepens while digging all the way down to the gulf coast. Therefore,
have bumped up pops Monday into the 70 to 80% range. Will continue
the ffa on the southshore due to potential impacts of sea breeze and
storms that may translate into flash flooding. If storm motions
observed today hold into tomorrow, may not be as high of a threat as
previously thought. The threat for heavy rain will be diminishing
Tuesday as well as high coverage as the trough shifts east.

Long term...

a secondary reinforcing trough will dig well into the southeastern
us Wednesday & Thursday. This will actually send a weak cold front
through the CWA wed. This will bring with it much drier air and
knock down temperatures by a few degrees. Dewpoints and even morning
lows could be dropping into the upper 60s for some locations (mainly
i-12 and northward). The pleasant weather will be short-lived
however, with moisture and lower rain chances returning Friday.

Meffer
marine... Very little change in the forecast. High pressure will
remain over the region through Tuesday but then a weak front will
drift into the area. Through Tuesday and south of the boundary weak
onshore flow will continue but when and where this front stalls
winds will be light and variable. If the front can push far enough
south then the waters could see light offshore flow Wednesday and
Thursday. Main concern for the coastal waters will be showers and
thunderstorms each day, mainly during the pre-dawn and morning
hours. Cab
aviation... Greatest impact will be from convection today. Overall
scattered to numerous shra and tsra will be around how ever trying
to pin point timing outside of the next hour or two will be
difficult. Outside of convectionVFR condition's are expected and
storms should quickly begin to dissipate after 1 2z. There could be
MVFR CIGS over much of the area overnight tonight around 2500-3k ft.

With any tsra winds could gust to 25 kts or greater but the gradient
winds is very light 6 kts or less. Cab
decision support...

dss code: blue.

Deployed: none.

Activation: none.

Activities: flash flood watch.

Preliminary point temps pops
Mcb 73 89 73 92 20 70 30 50
btr 76 89 76 91 20 70 30 70
asd 77 89 76 91 30 70 20 60
msy 78 89 78 91 40 70 20 60
gpt 78 88 77 91 40 70 20 60
pql 77 89 76 91 30 70 20 60

Lix watches warnings advisories
La... Flash flood watch through Monday evening for laz058-060>064.

Gm... None.

Ms... None.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KXPY 12 mi33 min S 6 84°F 77°F
SPLL1 - South Timbalier Block 52, LA / CSI06 18 mi128 min S 11 G 13 86°F
GISL1 - 8761724 - Grand Isle, LA 26 mi38 min SSW 5.1 G 9.9 83°F 85°F1015.8 hPa
LOPL1 - Louisiana Offshore Oil Port, LA 27 mi69 min 8.9 G 12 83°F 2 ft1016.1 hPa73°F
KDLP 46 mi33 min S 8.9 84°F 75°F
BYGL1 - 8762482 - Bayou Gauche, LA 46 mi44 min SSE 1.9 G 2.9 77°F 84°F1015.7 hPa
KMDJ 47 mi33 min SSW 11 84°F 75°F

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA12 mi73 minS 910.00 miFair84°F77°F79%1015.6 hPa
Galliano, South Lafourche Airport, LA23 mi73 minN 010.00 miFair78°F74°F90%1015.6 hPa

Wind History from XPY (wind in knots)
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Last 24hrSW8SW8SW8SW6SW14SW8W14
G23
CalmS3W9CalmSE4S4SW6SW6SW4CalmCalmS4S8S9S7S7S7
1 day agoSW8SW6W15CalmSW4NW4
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SW5NW4N5CalmNW5E7NE5SE9
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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
Mon -- 01:37 AM CDT     Moonset
Mon -- 06:33 AM CDT     Sunrise
Mon -- 07:47 AM CDT     1.43 feet High Tide
Mon -- 03:36 PM CDT     Moonrise
Mon -- 07:36 PM CDT     Sunset
Mon -- 08:04 PM CDT     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.70.811.11.31.41.41.41.41.31.21.110.80.60.50.40.30.30.20.30.30.4

Tide / Current Tables for Timbalier Island, Timbalier Bay, Mississippi River Delta, Louisiana
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Timbalier Island
Click for Map
Mon -- 01:37 AM CDT     Moonset
Mon -- 05:40 AM CDT     1.46 feet High Tide
Mon -- 06:33 AM CDT     Sunrise
Mon -- 03:37 PM CDT     Moonrise
Mon -- 06:01 PM CDT     0.24 feet Low Tide
Mon -- 07:36 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.911.21.31.41.51.51.41.41.21.110.80.60.50.40.30.30.20.30.30.40.50.6

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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.