Monday, June18, 2018 L-36.com


Marine Weather and Tides
Grand Isle, LA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:58AMSunset 8:05PM Monday June 18, 2018 2:19 AM CDT (07:19 UTC) Moonrise 10:15AMMoonset 11:32PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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 The Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Mile- Coastal Waters From Southwest Pass Of The Mississippi River To Port Fourchon Louisiana From 20 To 60 Mile- 1037 Pm Cdt Sun Jun 17 2018
.small craft advisory in effect until 7 am cdt Monday...
Rest of tonight..Southeast winds 20 to 25 knots. Seas 4 to 7 feet with occasional seas to 9 feet. Dominant period 7 seconds. Chance of showers and slight chance of Thunderstorms.
Monday..Southeast winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Dominant period 7 seconds. Chance of showers and Thunderstorms.
Monday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 7 seconds. Slight chance of showers and Thunderstorms early in the evening.
Tuesday..Southeast winds 5 to 10 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Tuesday night..Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Slight chance of showers and Thunderstorms after midnight.
Wednesday..South winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Slight chance of showers and Thunderstorms in the morning.
Wednesday night..South winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds.
Thursday..South winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 6 seconds. Slight chance of showers and Thunderstorms.
Thursday night..South winds 5 to 10 knots. Seas 1 to 2 feet.
Friday..South winds 5 to 10 knots. Seas 1 to 2 feet.
Friday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Slight chance of showers and Thunderstorms in the evening.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1037 Pm Cdt Sun Jun 17 2018
Synopsis..A broad area of low pressure will move through the western gulf of mexico tonight. This low will move into texas by early next week allowing high pressure to build back in from the east through the week.

7 Day Forecast for Marine Location Near Grand Isle, LA
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location: 29.2, -90.05     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 180454
afdlix
area forecast discussion
national weather service new orleans la
1154 pm cdt Sun jun 17 2018

Update
Vfr conditions are expected to prevail through Monday evening.

Highest chances of shra tsra on Monday are at kbtr so have a
prevailing -shra and vcts in the afternoon, otherwise other
airports have a prob30 for tsra which may be accompanied by
briefly lower vsby and CIGS bordering MVFR category. Any lower
ifr conditions are expected to be too brief and localized for
inclusion in the tafs. 22 td

Aviation
Prev discussion issued 915 pm cdt Sun jun 17 2018
sounding discussion...

the upper air release this evening was routine with no problems
encountered. The 00z sounding indicated an unstable but drier
atmosphere when compared to the profiles from this morning and
yesterday. The atmosphere was drier in both the lower and mid
levels and the precipitable water value was down to 1.71 inches.

Moderate south-southeast winds prevailed throughout the lower
levels of the atmosphere, with lighter and mainly east-southeast
winds in the mid levels, and generally moderate westerly winds in
the upper levels. 11
prev discussion... Issued 401 pm cdt Sun jun 17 2018
short term...

tropical outflow band moved north through the coastal waters, then
inland, penetrating all the way into central mississippi by early
afternoon. This flushed out the moisture a bit to limit convection
til now. Moisture recovery, followed by some more advancing
convective banding in the coastal waters to still provide a chance
for rain this evening. Quite a bit of uncertainty in timing these
features, but suffice to say, not the typical diurnal rainfall
pattern. High pressure steadily builds from the east to provide a
pop gradient from isolated coverage east to pretty decent coverage
west.

Long term...

a relaxed onshore flow pattern should persist Tuesday through next weekend
to provide more typical daily rainfall chances coverage and warmer than
normal temperatures as subsidence and modified continental influences
increase throughout the week. 24 rr
aviation...

expectVFR to some MVFR conditions through the TAF period. Showers
have not been as widespread this afternoon. Have kept convection out
of most TAF sites. Confidence is low in coverage of convection for
tomorrow and have not included it in TAF in long range. ExpectVFR
conditions for Monday. 13 mh
marine...

strong gradient winds continue over the outer waters which prompted
a gale warning to be issued this morning. The winds are still
elevated and the gale warning continues through the evening hours
into the morning hours. Will have to continue to watch for
cancellation or extension depending on forecast trends. The tropical
wave tracking across the western gulf of mexico and the high
pressure to the east is the culprit of the hazardous coastal
conditions. Outside of the gale warning and small craft advisory
continues for a large portion of the coastal waters. Winds and seas
should continue to back off heading into next week as high pressure
builds back in and the pressure gradient weakens. 13 mh
decision support...

dss code: blue.

Deployed: none.

Activation: none.

Activities: gale warning.

Small craft advisory.

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; marginal risk severe or excessive rain.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support for slight risk severe
or excessive rain.

Orange = high impacts; enhanced risk severe; nearby tropical events;
hazmat or other large episodes.

Red = full engagement for moderate to high risk of severe and or
excessive rainfall, or direct tropical threats; events of
national significance.

Preliminary point temps pops
Mcb 73 89 71 88 20 40 10 30
btr 74 90 73 88 30 60 20 40
asd 77 89 74 89 20 30 10 20
msy 78 88 77 89 30 40 10 30
gpt 78 87 76 89 20 30 10 20
pql 75 89 73 90 20 30 10 20

Lix watches warnings advisories
La... None.

Gm... Small craft advisory until 7 am cdt Monday for gmz550-552-555-
570-572-575.

Ms... None.

Gm... Small craft advisory until 7 am cdt Monday for gmz552-555-570-
572-575.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi49 min SSE 8 G 14 83°F 84°F1017.8 hPa
KXPY 10 mi44 min SE 13 G 19 84°F 77°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi49 min SSE 20 G 23 83°F 5 ft1018.1 hPa
KDLP 27 mi44 min SSE 8.9 G 15 84°F 81°F
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi49 min SE 13 G 19 84°F 82°F1018.5 hPa
BURL1 - Southwest Pass, LA 39 mi79 min SE 18 G 19 83°F 1018.1 hPa (-0.3)78°F
KMDJ 41 mi44 min SE 20 84°F 79°F
PILL1 42 mi49 min SSE 6 G 9.9 82°F 83°F1018.2 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi49 min ESE 7 G 12 82°F 85°F1017.8 hPa

Wind History for Grand Isle, LA
(wind in knots)    EDIT      (on/off)   Help
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S12
G20
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SW5
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G7
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G12
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SW3
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G8
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G6
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NE1
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S4
SE2
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G6
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G8
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G12
S8
G12
S7
G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA10 mi44 minSE 13 G 194.00 miPartly Cloudy with Haze84°F77°F79%1017.6 hPa
Galliano, South Lafourche Airport, LA20 mi44 minSE 410.00 miFair82°F74°F78%1017.6 hPa

Wind History from XPY (wind in knots)
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Last 24hrSE13
G20
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G18
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SE8
G14
SE16SE15
G24
SE19
G25
SE17
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G26
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G35
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SE9E8SE14
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1 day agoS8S9S4SW4CalmCalm4SE6SE9SE10E9
G15
SE13SE14
G20
SE13
G19
SE11
G17
SE13
G20
S12SE9
G17
SE8
G13
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G18
SE12
G17
SE13
G21
SE13
G20
SE16
G24
2 days agoS6S4SW6S4SW4SW5SW4W5NW10CalmCalm4SE554S4SE7SE5SE6SE6
G12
SE7S8S10S10

Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
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Caminada Pass (bridge)
Click for Map
Mon -- 01:59 AM CDT     -0.11 feet Low Tide
Mon -- 06:01 AM CDT     Sunrise
Mon -- 11:14 AM CDT     Moonrise
Mon -- 03:06 PM CDT     0.96 feet High Tide
Mon -- 08:01 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0-0.1-0.1-0.1-000.10.20.30.50.60.70.80.90.910.90.90.80.70.60.40.30.2

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
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Bayou Rigaud
Click for Map
Mon -- 12:39 AM CDT     -0.19 feet Low Tide
Mon -- 06:00 AM CDT     Sunrise
Mon -- 11:14 AM CDT     Moonrise
Mon -- 01:58 PM CDT     1.04 feet High Tide
Mon -- 08:01 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.2-0.1-0.100.20.30.40.60.70.80.9111110.90.70.60.40.30.20.1

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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 (3,6,7,8)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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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.