Monday, May29, 2017 L-36.com


Marine Weather and Tides
Pointe a la Hache, 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 5:59AMSunset 7:56PM Monday May 29, 2017 6:23 AM CDT (11:23 UTC) Moonrise 10:03AMMoonset 11:53PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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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GMZ552 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- 350 Am Cdt Mon May 29 2017
Today..South winds 10 to 15 knots. Seas 3 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Tonight..South winds 10 knots. Seas 2 to 3 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Tuesday..Southeast winds 10 to 15 knots. Seas 3 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Tuesday night..Southeast winds 10 to 15 knots. Seas 3 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Wednesday..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Wednesday night..Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds. Slight chance of showers and Thunderstorms.
Thursday..Southeast winds 10 to 15 knots. Seas 3 feet. Dominant period 5 seconds. Slight chance of showers and Thunderstorms.
Thursday night..Southeast winds 10 to 15 knots. Seas 3 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Friday..South winds 10 to 15 knots. Seas 3 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Friday night..South winds 10 to 15 knots. Seas 3 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 350 Am Cdt Mon May 29 2017
Synopsis..A weak cold front will stall along the gulf coast today before becoming diffuse and remaining through much of the week.

7 Day Forecast for Marine Location Near Pointe a la Hache, LA
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location: 29.43, -89.98     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 290821
afdlix
area forecast discussion
national weather service new orleans la
321 am cdt Mon may 29 2017

Synopsis
Outflow from earlier thunderstorms over northern louisiana and
southern mississippi has moved south of lake pontchartrain and
currently lies near a gulfport to houma line. Behind the outflow,
dew points have fallen off into the lower and middle 60s.

Scattered thunderstorms are developing in advance of the outflow,
and most convection should be over the gulf of mexico by sunrise.

Short term
Forecast problem of the day is how much the current convective
outflow stabilizes the airmass. Certainly there is at least
temporary stabilization as noted by radar, but the 12z soundings
should be rather instructive as to how long it will take to wipe
out the inversion the outflow has set up.

Models are showing another impulse, likely a mcv, moving away
from the south texas convection this morning toward our area. It
should be noted that the hrrr depiction of the situation has been
running 3 hours or so behind reality for most of the night.

Convection allowing models (cams) are sending rather mixed
messages on convective redevelopment today. While there will
likely be a lull in precipitation this morning for much of the
area, will operate under the assumption that the lower levels will
mix out, allowing convective development as the next jet impulse
approaches. Will carry high chance to likely pops, but forecast
confidence is somewhat lower than i'd like. Pattern repeats
through the daytime hours Tuesday before shortwave ridging tries
to build into the area Tuesday night and Wednesday. Will continue
to carry mention of thunderstorms through Wednesday, but pops will
be lower Tuesday night and Wednesday.

Timing of clouds and precipitation will be the determining factor
in high temperatures over the next few days. Don't expect many 90
degree readings today, and most areas not likely to get much past
the lower or middle 80s. Similar conditions Tuesday before
temperatures warm a few degrees on Wednesday. 35

Long term
Thursday should be somewhat similar to Wednesday with somewhat
lower pops than the surrounding days, before deeper moisture
returns with impulses moving through the southwesterly mid level
flow across the area. Scattered convection is expected for the
weekend with the usual diurnally driven timing. Temperatures near
normal for that time period. 35

Aviation
Ceilings are remaining at ovc040+ outside tsra and shra areas where
ceilings fall to ovc015. This will remain the case through at least
late morning and begin to improve after for all south shore
locations. But north shore terminals may continue with these
conditions for a bit longer into the afternoon hours. Will use vcts
in most if not all tafs for this pack. The same conditions are
expected to move in again overnight. The number of tsra may increase
by Tuesday morning.

Marine
Light to occasionally moderate onshore flow will prevail across the
coastal waters through the upcoming week as a ridge of high pressure
remains over the eastern gulf of mexico and florida. A weak cold
front will stall today becoming more diffuse through mid week. A
general weakness in the atmosphere will remain through at least
Wednesday. Somewhat of a break in activity may occur Thursday and
Friday but chances of sh TS will once again be on the rise as we
move into next weekend. Winds and seas will be much higher in and
near thunderstorms throughout the week.

Decision support
Dss code... Blue.

Deployed... None.

Activation... None.

Activities... Monitoring mississippi river.

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 82 68 80 66 60 60 70 30
btr 83 69 82 68 60 50 60 30
asd 85 72 84 70 60 40 60 30
msy 85 74 85 72 60 50 60 30
gpt 83 73 84 72 60 40 50 30
pql 84 71 85 69 50 40 50 30

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
GISL1 - 8761724 - Grand Isle, LA 11 mi53 min NE 8 G 13 74°F 81°F1016.4 hPa
GRBL1 23 mi143 min N 25 G 30 1014.4 hPa (-2.0)
KXPY 24 mi48 min N 8 75°F 66°F
KDLP 31 mi43 min N 16 75°F 72°F
SHBL1 - 8761305 - Shell Beach, LA 34 mi53 min ENE 5.1 G 6 72°F 81°F1016.2 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 34 mi53 min SW 2.9 G 8 72°F 84°F1017.4 hPa
CARL1 36 mi53 min 73°F
LOPL1 - Louisiana Offshore Oil Port, LA 38 mi90 min N 20 G 24 75°F 4 ft1015.1 hPa
PILL1 42 mi53 min N 4.1 G 6 74°F 73°F1016 hPa
NWCL1 - 8761927 - New Canal, LA 42 mi53 min SE 4.1 G 9.9 74°F 80°F1015.6 hPa
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 46 mi53 min N 14 G 16
SPLL1 - South Timbalier Block 52, LA / CSI06 47 mi143 min ENE 4.1 G 5.1
BURL1 - Southwest Pass, LA 47 mi83 min NNW 15 G 16 78°F 1015.9 hPa (-0.0)73°F

Wind History for Grand Isle, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galliano, South Lafourche Airport, LA15 mi28 minE 310.00 miThunderstorm70°F65°F85%1017.6 hPa
Port Fourchon, LA24 mi28 minN 910.00 miOvercast75°F66°F74%1017.3 hPa

Wind History from GAO (wind in knots)
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Last 24hrSW8SW3SW6SW6W3SW3CalmS5CalmSE6SE7SE6S10SE8SE7S7CalmCalmNW5NW3N4N11
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1 day agoS6S6SW9S8S7S12
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2 days agoS3SE5S9S10S11S11
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SW9S6SW6S6SE5S5S4SE4SE4SE5S8S7S6S5S8S10

Tide / Current Tables for Manilla, Mississippi River Delta, Louisiana
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Manilla
Click for Map
Mon -- 02:55 AM CDT     -0.27 feet Low Tide
Mon -- 06:01 AM CDT     Sunrise
Mon -- 10:03 AM CDT     Moonrise
Mon -- 02:42 PM CDT     1.24 feet High Tide
Mon -- 07:53 PM CDT     Sunset
Mon -- 11:52 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.2-0.3-0.3-0.2-0.2-00.10.30.50.70.811.11.21.21.21.110.90.70.50.30.2

Tide / Current Tables for Independence Island, Mississippi River Delta, Louisiana
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Independence Island
Click for Map
Mon -- 01:41 AM CDT     -0.25 feet Low Tide
Mon -- 06:01 AM CDT     Sunrise
Mon -- 10:03 AM CDT     Moonrise
Mon -- 02:39 PM CDT     1.13 feet High Tide
Mon -- 07:53 PM CDT     Sunset
Mon -- 11:52 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.2-0.2-0.2-0.1-00.10.20.40.50.70.811.11.11.11.110.90.70.50.40.20.1

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.