Monday, August21, 2017 L-36.com


Marine Weather and Tides
Port Sulphur, 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 6:30AMSunset 7:35PM Monday August 21, 2017 10:54 AM CDT (15:54 UTC) Moonrise 6:16AMMoonset 7:41PM Illumination 0% Phase: New Moon; Moon at 29 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 Chandeleur Sound-breton Sound- 958 Am Cdt Mon Aug 21 2017
Rest of today..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the late morning and afternoon.
Tonight..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms through the night.
Tuesday..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday night..South winds 5 to 10 knots becoming west after midnight. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms through the night.
Wednesday..North winds 5 to 10 knots becoming southeast early in the afternoon, then becoming south late in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday night..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Thursday..North winds 5 to 10 knots becoming northeast in the late morning and early afternoon, then becoming southeast late in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Thursday night..Southwest winds 5 to 10 knots becoming north after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday night..South winds 5 to 10 knots becoming northeast after midnight. Waves 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- 958 Am Cdt Mon Aug 21 2017
Synopsis..High pressure will remain over the coastal waters through mid-week. A weak front will approach the coast from the north Wednesday. This front should stall along the coast for the latter part of the week.

7 Day Forecast for Marine Location Near Port Sulphur, LA
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location: 29.6, -89.62     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 211428
afdlix
area forecast discussion
national weather service new orleans la
928 am cdt Mon aug 21 2017

Sounding discussion Flight this morning went well and burst
about 32565 meters above the ground. Biggest change from last
nights sounding is the increase in moisture and slightly cooler
profile. The bad thing is this could lead to a few more showers
and thunderstorms today. There is no real cap either so convection
may begin to develop rather quickly this morning. One good thing
is winds aloft are out of the east and east-northeast so this
should hopefully keep any cirrus from thunderstorms from drifting
too far into the area. Right now all is good with mainly scattered
clouds close to the coast.

Hopefully convection holds off so most everyone can view the
eclipse today which will begin at 1157am with the peak at 129pm.

We will not see totality but with the appropriate viewing
equipment it will still be something cool to see with around
75-79% of the Sun being blocked out over southeast la and southern
ms. Locations in our area with the greatest percentage of the sun
being blocked will be in ms where both mccomb and pascagoula will
have around 79% blocked. Cab

Prev discussion issued 401 am cdt Mon aug 21 2017
short term...

numbers of sh TS will be low again today as we remain under a
drier and more subsident environment. The dry air is moving into
the area from the east and southeast. This is occurring as meso-
ridge waves rotate around the low to mid level stacked high
centered near the carolinas. This will slowly change as a wave of
moisture moves in Tuesday and Wednesday. The upper low will also
contribute as it moves west very slowly.

One thing that is helping us stay tropical cyclone free is the
bermuda ridge holding strong as it is connected with the stacked
high over the southwest conus. This provides a nice strong ridge
pattern from 500mb up and stretches across the entire southern
gulf coast. But this changes a bit through the week as the mid-
upper ridge breaks down Wednesday and Thursday. This will be due
to a trough, currently located over saskatchewan canada, digging
southward into the ridge by mid and late week. This will occur
rapidly through Tuesday then slows to a crawl as it approaches the
southeast conus. This weakness will keep the sh TS going over our
area as well by weeks' end. But alas, the mid and upper bermuda
ridge will not give in as it will build back over the area by
Friday.

Long term...

a possible wet weekend coming up and global models want to leave
the sfc weakness very close or even over the area into the first
of next week. This should keep the chances of sh TS on the higher
than average side as we move through the weekend into the start of
next week.

Aviation Tsra will show a low coverage again today. There will
not be enough probability to include in this TAF cycle.VFR
conditions should be the prevailing conditions with the only
exception being some vis reduction due to br or even fg for a
short time around sunrise. This should mainly affect terminals
west and north.

Marine No changes as high pressure remains the dominant
factor over the northern gulf. Diurnal fluctuations will remain the
main driver of winds. Most nights, look for a weak enhanced jet over
the waters east of the ms delta where winds could bump up to near 10
knots. Seas will remain around 2 ft or less.

Decision support
Dss code: blue.

Deployed: nohsep.

Activation: none.

Activities: dss support for nohsep; monitoring convective trends.

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 92 73 92 74 20 10 30 20
btr 93 76 91 75 20 10 30 20
asd 92 76 92 76 30 20 30 20
msy 91 78 90 78 20 20 30 30
gpt 90 77 91 76 30 20 30 20
pql 91 76 91 75 30 20 30 20

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
SHBL1 - 8761305 - Shell Beach, LA 19 mi54 min NE 9.9 G 11 85°F 90°F1020.1 hPa (+1.4)
GISL1 - 8761724 - Grand Isle, LA 29 mi54 min NE 2.9 G 6 87°F 89°F1019.7 hPa (+1.4)
KDLP 33 mi39 min E 9.9 93°F 75°F
PILL1 35 mi54 min NE 6 G 9.9 86°F 85°F1019.6 hPa (+1.6)
CARL1 36 mi54 min 85°F
GRBL1 39 mi114 min NE 2.9 G 4.1 1019.2 hPa (+1.3)
NWCL1 - 8761927 - New Canal, LA 39 mi54 min NE 12 G 13 84°F 88°F1019.7 hPa (+1.3)
BYGL1 - 8762482 - Bayou Gauche, LA 44 mi54 min E 2.9 G 5.1 89°F 88°F1019.9 hPa (+1.1)
KXPY 45 mi39 min E 4.1 88°F 73°F
KMIS 46 mi34 min 4.1 90°F 75°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 48 mi54 min ENE 8 G 9.9 90°F
BURL1 - Southwest Pass, LA 49 mi54 min NE 7 G 7 87°F 1019.8 hPa (+1.6)78°F

Wind History for Shell Beach, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boothville, LA22 mi63 minNE 510.00 miFair89°F78°F70%1019.7 hPa

Wind History from BVE (wind in knots)
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Last 24hrNE6NE7NE6NE7NE4E6E5E6E3SE3E3SE3E3SE3SE3SE3SE3CalmCalmN4NW3Calm3NE5
1 day agoNW5N8NE54NW4S433CalmCalmW3CalmCalmCalmCalmCalmCalmNE3CalmCalmE3CalmNE5NE7
2 days agoN8N53SW9W6S5SW5SW6SW3S4SW4SW5SW5W4W5SW4SW5W4W9W7W4NW6NW8NW8

Tide / Current Tables for Bay Gardene, Louisiana
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Bay Gardene
Click for Map
Mon -- 06:16 AM CDT     Moonrise
Mon -- 06:29 AM CDT     Sunrise
Mon -- 01:11 PM CDT     1.77 feet High Tide
Mon -- 01:31 PM CDT     New Moon
Mon -- 07:32 PM CDT     Sunset
Mon -- 07:40 PM CDT     Moonset
Mon -- 11:27 PM CDT     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.30.40.60.70.911.21.31.51.61.71.81.71.71.51.310.80.60.40.30.2

Tide / Current Tables for Gardner Island, Breton Sound, Louisiana
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Gardner Island
Click for Map
Mon -- 06:15 AM CDT     Moonrise
Mon -- 06:28 AM CDT     Sunrise
Mon -- 11:03 AM CDT     1.93 feet High Tide
Mon -- 01:31 PM CDT     New Moon
Mon -- 07:31 PM CDT     Sunset
Mon -- 07:39 PM CDT     Moonset
Mon -- 10:25 PM CDT     0.39 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.40.60.70.911.21.41.61.81.91.91.91.81.71.51.210.80.60.50.40.40.4

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 (11,2,3,4)
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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.