Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Port Sulphur, LA

Version 3.4
What's New / NOTES
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 6:00AMSunset 7:52PM Tuesday May 23, 2017 7:34 PM CDT (00:34 UTC) Moonrise 4:29AMMoonset 5:34PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 426 Pm Cdt Tue May 23 2017
.small craft advisory in effect through late Wednesday night...
Tonight..West winds 15 to 20 knots with frequent gusts over 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the late evening and overnight.
Wednesday..Northwest winds 20 to 25 knots. Waves 3 to 5 feet with occasional waves to 6 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms in the morning.
Wednesday night..Northwest winds 20 to 25 knots easing to 10 to 15 knots after midnight. Waves 3 to 5 feet with occasional waves to 6 feet. Dominant period 4 seconds.
Thursday..West winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Thursday night..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..South winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday night..South winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Saturday..South winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Saturday night..South winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Sunday..South winds 15 to 20 knots. Waves 3 to 5 feet. Slight chance of showers and Thunderstorms.
Sunday night..Southwest winds 15 to 20 knots. Waves 3 to 5 feet. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 426 Pm Cdt Tue May 23 2017
Synopsis..A cold front will move through the area late tonight and early Wednesday morning allowing high pressure to settle over the coastal waters later Wednesday into Thursday. High pressure will then move east by Friday into the weekend as low pressure develops over the southern plains.

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 232142
afdlix
area forecast discussion
national weather service new orleans la
442 pm cdt Tue may 23 2017

Short term (tonight through Thursday night)
Water vapor satellite imagery showed the deepening longwave trough
over central north america. The smaller shortwave feature of
interest was a trough moving southeast over the panhandle region
of oklahoma and texas and the enhanced upper level divergence to
its southeast over north central, central and northeast texas.

While the weaker frontal boundary remains stalled across the
central gulf coast region, the reinforcing main cold front will
move fairly quickly through the ark-la-tex region later this
afternoon and evening and then continue southeast through the
forecast area later this evening through the overnight and early
morning hours on Wednesday as the main upper trough swings east
into the lower mississippi valley. A blend of various synoptic
scale and mesoscale convective allowing models suggest there will
be scattered to numerous showers and generally isolated to locally
scattered thunderstorms ahead of the main cold front later this
evening and overnight. Speed shear and slight to moderate
instability will be favorable for a few stronger to marginally
severe thunderstorms to develop in some areas with a bit more
confidence in more robust storms near the south louisiana coast
and in the coastal waters.

Drier and cooler air will be impressive for late may behind the
cold front as high pressure builds over the region and as the
upper trough moves east of the region Wednesday afternoon. Lows
in the upper 50s to mid 60s are expected late tonight, then highs
should be generally in the mid 70s to around 80 on Wednesday. The
coolest lows are expected Wednesday night with readings in the
lower to mid 50s over most northern areas with upper 50s and lower
60s over most of the south. The surface high will cover much of
the gulf of mexico and north gulf coast region Thursday before
moving east Thursday night.

Long term (Friday through Tuesday)
Enjoy the drier, cooler conditions while you can as the airmass
will be quite transient with return flow already back over the
region early Friday morning. The pattern will be progressive with
a shortwave trough moving from the northwest states east-southeast
into the central u.S. Upper to mid mississippi valley over the
weekend. This will push a frontal boundary south that will be
stalling, most likely north of the forecast area. Temperatures
will be warming above normal with many most areas in the upper 80s
to lower 90s Friday through Saturday, except for some cooler mid
80s in some coastal areas. The first part of the holiday weekend
from Friday night through Saturday night looks dry at this point,
however the rise in deeper layer moisture will moist likely
support a decent chance of showers and thunderstorms with daytime
heating Sunday and memorial day. 22 td

Aviation
Conditions were trending towardsVFR at most locations with at
least scattered clouds near fl020-030 and higher clouds fl040-050.

Will probably lose much of the lower cloud cover briefly around
sunset. Isolated to scattered convection associated with main
upper level impulse should move across most terminals after 06z,
exiting the gpt terminal area by about 14z based on mesoscale
modeling. Will carry prob30 for now for the tsra as development is
not certain for a particular terminal.VFR conditions expected to
move into western terminals by 18z Wednesday. 35

Marine
A fairly strong late may cold front will shift winds from
southwest west to northwest Wednesday and remain elevated. Before
that, there will be a slight easing of wind speeds tonight with
some areas easing to around 15 knots or 10 to 15 knots for a
short period. But as the cold front moves through the coastal
waters, winds will once again rise to 15 to 25 knots. Changed up
the small craft advisory headlines timing somewhat to account for
latest data trends and wind forecasts. An area of high pressure
is then expected to move from west to east across the north gulf
Wednesday night and Thursday which will bring a brief period of
lighter winds Thursday afternoon and evening, then a return of
moderate south winds is expected late Thursday night into Friday
into the weekend. 22 td

Decision support
Dss code... Blue.

Deployed... None.

Activation... None.

Activities... Monitoring mississippi river flooding.

Decision support services (dss) code legend
green = no weather impacts that require action
blue = long fused watch warning advisory in effect or high
visibility event
yellow = heightened impacts with short fused
watch warning 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 tonight risk svr
and or direct tropical threats; events of national
significance

Preliminary point temps pops
Mcb 59 76 52 83 60 10 0 0
btr 61 77 55 84 50 10 0 0
asd 64 79 56 84 50 20 0 0
msy 66 79 60 84 50 10 0 0
gpt 66 80 59 84 40 30 0 0
pql 63 79 55 83 50 30 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory from 1 am to 10 pm cdt Wednesday for gmz550-
552-570-572.

Small craft advisory until 1 am cdt Thursday for gmz532-536-538-
555-557-575-577.

Ms... None.

Gm... Small craft advisory from 1 am to 10 pm cdt Wednesday for gmz552-
570-572.

Small craft advisory until 1 am cdt Thursday for gmz536-538-555-
557-575-577.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHBL1 - 8761305 - Shell Beach, LA 19 mi52 min WNW 5.1 G 6 79°F 81°F1005.7 hPa
GISL1 - 8761724 - Grand Isle, LA 29 mi52 min W 9.9 G 13 79°F 80°F1006.1 hPa
KDLP 33 mi34 min W 11 G 16 79°F 77°F
PILL1 35 mi52 min WSW 8.9 G 12 72°F1006.2 hPa
CARL1 36 mi58 min 72°F
GRBL1 39 mi94 min WSW 17 G 20 1006.5 hPa (-1.2)
NWCL1 - 8761927 - New Canal, LA 39 mi52 min NW 2.9 G 5.1 81°F 80°F1005.3 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 44 mi52 min W 2.9 G 5.1 82°F 81°F1005.7 hPa
KXPY 45 mi39 min W 9.9 79°F 72°F
KMIS 46 mi39 min SW 14 79°F 73°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 48 mi58 min WSW 16 G 19
BURL1 - Southwest Pass, LA 49 mi34 min W 16 G 17 77°F 1006.4 hPa (-1.3)73°F

Wind History for Shell Beach, LA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boothville, LA22 mi43 minWSW 119.00 miFair79°F73°F85%1006.2 hPa

Wind History from BVE (wind in knots)
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Last 24hrE4SE5SE5SE7SE8SE10
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--SW15
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1 day agoSW9NW7NW6NW6SW7SE10S11
G18
SW6NE5NE5N5N3N34NE4NE5E4NE3NE3CalmNE4E5E5SE3
2 days agoS9S10S6S7S8S9S9SW6SW6SW6SW7CalmS3
G18
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N14
G22
E8S6SE7S7S11
G17
S13S12
G16

Tide / Current Tables for Bay Gardene, Louisiana
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Bay Gardene
Click for Map
Tue -- 04:29 AM CDT     Moonrise
Tue -- 06:01 AM CDT     Sunrise
Tue -- 11:49 AM CDT     1.33 feet High Tide
Tue -- 05:33 PM CDT     Moonset
Tue -- 07:49 PM CDT     Sunset
Tue -- 09:22 PM CDT     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.70.70.80.80.911.11.21.31.31.31.31.210.80.60.40.30.20.10.10.2

Tide / Current Tables for Gardner Island, Breton Sound, Louisiana
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Gardner Island
Click for Map
Tue -- 04:28 AM CDT     Moonrise
Tue -- 06:00 AM CDT     Sunrise
Tue -- 09:41 AM CDT     1.29 feet High Tide
Tue -- 05:32 PM CDT     Moonset
Tue -- 07:48 PM CDT     Sunset
Tue -- 08:25 PM CDT     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.60.60.70.80.911.11.21.31.31.31.210.90.70.50.30.20.1000.10.2

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 (20,4,5,8)
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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.