Tuesday, November21, 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 6:29AMSunset 5:02PM Tuesday November 21, 2017 6:00 AM CST (12:00 UTC) Moonrise 10:00AMMoonset 8:44PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 330 Am Cst Tue Nov 21 2017
.small craft advisory in effect from late tonight through late Wednesday night...
Today..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Tonight..East winds 10 knots becoming north 20 to 25 knots after midnight. Waves 1 to 2 feet. Dominant period 4 seconds. Waves building to 3 to 6 feet. Dominant period 4 seconds after midnight.
Wednesday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Wednesday night..North winds 20 to 25 knots. Waves 3 to 6 feet. Dominant period 4 seconds.
Thursday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Thursday night..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Friday..North winds 10 to 15 knots becoming northwest near 5 knots late in the afternoon. Waves 2 to 3 feet. Dominant period 4 seconds.
Friday night..West winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Saturday..West winds 10 to 15 knots. Waves 2 to 3 feet.
Saturday night..North winds 15 to 20 knots. Waves 3 to 5 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 330 Am Cst Tue Nov 21 2017
Synopsis..A strong disturbance will move east today ahead of a cold front that will move through the northern gulf Wednesday evening. High pressure will slowly settle over the area through the end 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 211011
afdlix
area forecast discussion
national weather service new orleans la
411 am cst Tue nov 21 2017

Discussion
The most impactful weather through the forecast period will be
occuring over the next 24 hours. A split flow trough pattern is
developing across the center of the country with the sharper portion
diving south from canada into the upper mississippi valley.

Amplification of both troughs will occur today which will send a
cold front across the CWA tonight. A slight shift in the timing of
this boundary suggested by models means that previous thinking that
rain will be limited to coastal waters simply won't be the case.

Radar already shows showers passing across the southern tier of
louisiana parishes with more off the coast of texas and moving
northeast. Its this second batch that meso and medium range models
show moving into the CWA from the southwest before the front gets
here. For this reason, have modified pops to attempt to capture this
solution. The result is generally 20% for most of the area today and
20-50% with higher pops in extreme SW CWA zones and less than 10% in
ne zones. This is through 06z as fast approaching front will shift
rain south after that. This FROPA will take the little warming that
will occur on today and bring temps back down to a good 5 to 10
degrees below normal for wed-fri.

The CWA will generally remain under troughing through the rest of
this week and through the weekend. This will be the case due to the
mid week trough's lack of progressiveness and a deep trough diving
out of canada into the eastern 1 4 of the CONUS this weekend.

Another frontal boundary will swing through Saturday evening,
reinforcing cooler temps. No rain expected with this boundary.

Meffer

Aviation
Ceilings should run bkn035+. Vis not expected to be restricted with
the exception of an area along and southwest of a line from btr to
hum with some light to moderate rain after dark. New front moves
through Wed morning with clearing. East winds become north today and
remain that way ahead of and behind the front but elevated speeds
especially on the lee side of lakes.

Marine
Winds will begin to rise today ahead of a disturbance that will
begin to develop over the texas coastal bend. As this disturbance
moves east sh TS and winds will slowly increase through the day. A
more abrupt rise in wind speed will occur late tonight as a cold
front approaches. The cold front will pass through the northern gulf
wed during the day. Between the disturbance getting forced south and
the front moving in, winds will ease a bit back to around 15 to 20kt
wed afternoon. The front will pass by late afternoon and early
evening causing winds to rise abruptly once again. Since winds will
only ease a bit Wed afternoon before rising once again, we will
continue the advisory through this period as well.

Winds ease by the end of the week as high pressure settles across
the northern gulf. Saturday looks like the lightest wind day at the
moment as it transitions from high pressure to a new front moving
through for Saturday night into Sunday. Return flow to become better
established by the start of next week.

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: marine.

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 68 46 62 33 20 10 0 0
btr 69 49 63 33 20 30 0 0
asd 71 48 66 36 20 10 0 0
msy 71 53 66 44 20 30 0 0
gpt 70 51 65 39 10 10 0 0
pql 70 46 66 34 10 10 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory from 4 am Wednesday to 4 am cst Thursday
for gmz536-538-550-552-555-557-570-572-575-577.

Ms... None.

Gm... Small craft advisory from 4 am Wednesday to 4 am cst Thursday
for gmz538-550-552-555-557-570-572-575-577.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHBL1 - 8761305 - Shell Beach, LA 19 mi48 min NE 12 G 13 57°F 64°F1016.6 hPa
GISL1 - 8761724 - Grand Isle, LA 29 mi42 min NE 8 G 12 59°F 67°F1016.3 hPa
KDLP 33 mi25 min 2.9 70°F 59°F
PILL1 35 mi42 min NE 2.9 G 4.1 60°F 61°F1016.1 hPa
CARL1 36 mi42 min 59°F
NWCL1 - 8761927 - New Canal, LA 39 mi42 min Calm G 1.9 54°F 64°F1016.3 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 44 mi42 min NE 1.9 G 2.9 53°F 61°F1016.5 hPa
KMIS 46 mi25 min SE 5.1 72°F 55°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 48 mi42 min ENE 11 G 12 67°F 63°F1016.4 hPa
BURL1 - Southwest Pass, LA 49 mi60 min NE 9.9 G 9.9 65°F 1016.1 hPa (-0.0)56°F

Wind History for Shell Beach, LA
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE18
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1 day
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N24
G29
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NW12
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S7
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G18
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G24
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G24
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G27
SW17
G24
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G22
SW15
G19
SW13
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G15
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G17
SW14
G17
SW12
G16
NW25
N24
G29
N28
N23
G30
N30
N26
G33
N26
G32

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boothville, LA22 mi69 minNNE 310.00 miLight Rain63°F59°F87%1016.3 hPa

Wind History from BVE (wind in knots)
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Last 24hrNE10
G15
NE8NE9NE10NE8NE6N8NE6NE7NE6NE8NE54NE6NE6NE4NE5NE5NE4E3E4CalmN3N3
1 day agoN11
G28
N14
G26
N12
G26
N12
G21
--N9
G22
N12
G19
N12
G19
N9
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N9N8N10
G18
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N8NE7NE9NE10NE9
G16
2 days agoS6S6S8S9S12S14S14
G19
S12S12
G20
SW11SW12SW10SW9SW9SW10SW11SW12SW14
G19
NW20
G25
N15
G27
N14
G21
N17
G27
N18
G31
N12
G25

Tide / Current Tables for Bay Gardene, Louisiana
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Bay Gardene
Click for Map
Tue -- 12:51 AM CST     1.78 feet High Tide
Tue -- 06:27 AM CST     Sunrise
Tue -- 08:59 AM CST     Moonrise
Tue -- 11:49 AM CST     0.07 feet Low Tide
Tue -- 05:00 PM CST     Sunset
Tue -- 07:44 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.81.71.61.41.210.70.50.30.20.10.10.10.20.30.40.60.70.91.11.31.41.6

Tide / Current Tables for Gardner Island, Breton Sound, Louisiana
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Gardner Island
Click for Map
Tue -- 06:27 AM CST     Sunrise
Tue -- 08:58 AM CST     Moonrise
Tue -- 10:39 AM CST     -0.13 feet Low Tide
Tue -- 04:59 PM CST     Sunset
Tue -- 07:43 PM CST     Moonset
Tue -- 11:48 PM CST     1.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.51.41.210.70.50.20.1-0.1-0.1-0.1-0.100.10.30.50.60.811.21.41.51.6

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 (7,2,3,4)
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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.