Friday, June23, 2017 L-36.com


Marine Weather and Tides
Grand Isle, 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 8:06PM Friday June 23, 2017 8:58 AM CDT (13:58 UTC) Moonrise 4:39AMMoonset 6:42PM 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
    EDIT      (on/off)   Help
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- 344 Am Cdt Fri Jun 23 2017
.small craft advisory in effect through this afternoon...
Today..South winds 20 to 25 knots. Seas 6 to 8 feet. Dominant period 7 seconds. Slight chance of showers and Thunderstorms.
Tonight..South winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 6 seconds.
Saturday..South winds 5 to 10 knots. Seas 3 feet. Dominant period 6 seconds. Slight chance of showers and Thunderstorms.
Saturday night..Southwest winds 5 to 10 knots becoming west after midnight. Seas 2 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Sunday..North winds 5 to 10 knots becoming northeast in the late morning and afternoon. Seas 1 to 2 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Sunday night..Northeast winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Monday..East winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Chance of showers and Thunderstorms.
Monday night..East winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Tuesday..East winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 5 seconds. Chance of showers and Thunderstorms.
Tuesday night..East winds 15 to 20 knots. Seas 3 to 5 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- 344 Am Cdt Fri Jun 23 2017
Synopsis..A cold front should move into the coastal waters early next week before stalling and weakening.

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


Area Discussion for - New Orleans/Baton Rouge, LA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 klix 230843
afdlix
area forecast discussion
national weather service new orleans la
343 am cdt Fri jun 23 2017

Short term
Surface low from cindy now over arkansas while an upper low
remains back over northwest louisiana. This is where residual
moisture is able to develop some strong to severe thunderstorms.

As the moisture and remains of cindy get picked up in the
westerlies, the moisture along the axial bands are getting
stretched and sheared along the east side of the upper trough
north of the area. The line of sh TS will get reinvigerated today
with heating but will also begin to become more oriented east west
through Saturday as it becomes more involved with a cold front
that will be moving into the area as early as Saturday evening
before slowing to a crawl. But concurrent model runs continue to
suggest this boundary eventually making it through the area by
Monday. Basically, it will take the boundary almost 48 hours to
move from mccomb miss to the coast. Some dry air and weak
northerly winds are expected to move into the area for a short
stay late Monday through Tuesday.

Winds will slowly ease through today but they have been high
enough to keep water piled along the gulf coast preventing area
lakes from draining very fast. Water levels will continue their
slow fall through the next 24 hours. Lake levels should improve
enough today to keep water from most roadways but still expect
minor flooding of the lowest areas along the coast during high
tide today. The coastal flood advisory will remain into the
afternoon hours today but will likely be lowered as water should
be low enough after today to keep roadways dry. There are some
indications that minor coastal flooding will remain through the
weekend, but this does not make sense with wind speeds around 10
to 15 mph and enough drainage that should prevent further coastal
flooding into the weekend. For this reason, the advisory will not
be extended in time. Although, tides will remain unusually high
with no meteorological forcing to favor lower levels.

Showers with a few thunderstorms will continue to contain heavy
rainfall but should not be enough to cause more than minor issues
such as flooding of some raodways, low lying and poor drainage
areas.

Long term
Wednesday will see moisture begin to once again return to the area
with sh TS developing once again. But we should be moving into a
more summer routine with daily sh TS around.

Aviation
Primarily MVFR ceilings around fl015 this morning, occasionallyVFR.

Will carry vcsh as necessary based on radar trends early this
morning. Current hrrr output indicates most of the morning hours
should remain dry, and will hold off on any mention of vcts until
after 18z. Afternoon conditions outside of convection likely to be
bkn025-035. Most convection should dissipate near or shortly after
00z. Likely to see ceilings fall below fl020 again after 06z
Saturday. 35

Marine
Winds continue to ease back to moderate levels and will be low
enough to take SCA flags down by this afternoon. Swell will remain
around 3 feet causing a combined sea state of 5 to 8 feet through
the early afternoon. Winds are expected to remain light Saturday
through Sunday before becoming northeast around 15kt as a cold
front should edge into the northern gulf coast. Areas of sh ts
will remain through the fcast as the front is not expected to move
farther offshore.

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: monitoring hydro 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 86 74 85 71 60 30 70 30
btr 87 75 88 73 60 30 60 30
asd 87 76 88 74 50 30 50 30
msy 87 76 89 75 50 30 50 30
gpt 86 77 87 75 40 30 40 30
pql 86 75 87 74 40 20 40 30

Lix watches warnings advisories
La... Coastal flood advisory until 4 pm cdt this afternoon for laz040-
050-058-060>062-064-066>070-072.

Gm... Small craft advisory until 4 pm cdt this afternoon for gmz530-
532-534-536-538-550-552-555-557-570-572-575-577.

Ms... Coastal flood advisory until 4 pm cdt this afternoon for
msz080>082.

Gm... Small craft advisory until 4 pm cdt this afternoon for gmz532-
534-536-538-550-552-555-557-570-572-575-577.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GISL1 - 8761724 - Grand Isle, LA 7 mi41 min S 7 G 14 82°F 82°F1014 hPa
GRBL1 8 mi119 min S 17 G 19 1012.8 hPa (+1.0)
KXPY 10 mi24 min S 11 G 19 82°F 77°F
LOPL1 - Louisiana Offshore Oil Port, LA 22 mi59 min S 13 G 18 81°F 5 ft1012.1 hPa (+1.0)
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 39 mi41 min S 18 G 21 81°F
BURL1 - Southwest Pass, LA 39 mi59 min S 18 G 20 81°F 1014.1 hPa (+1.2)78°F
KMDJ 41 mi24 min S 22 82°F 79°F
PILL1 42 mi41 min S 17 G 20 81°F 80°F1014.1 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 45 mi41 min SSE 8 G 15 83°F 81°F1013.4 hPa
WDEL1 46 mi29 min 81°F 76°F

Wind History for Grand Isle, LA
(wind in knots)    EDIT      (on/off)   Help
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last
24hr
S12
G18
S11
G21
S11
G19
S12
G22
S11
G21
SW16
G27
SW14
G21
S13
G19
S12
G20
S13
G21
S10
G18
S8
G15
S9
G17
S10
G14
S9
G17
S9
G19
S9
G17
S8
G16
S9
G18
S11
G18
S10
G15
S9
G17
S6
G15
S10
G15
1 day
ago
SE13
G18
SE13
G22
SE16
G22
SE17
G23
SE12
G18
SE15
G23
SE12
G24
SE13
G24
S15
G20
SE14
G21
SE12
G20
S13
G23
S16
G25
S17
G24
S15
G22
S14
G24
S14
G25
S16
G22
S16
G23
S13
G19
S14
G20
S12
G22
S13
G24
S12
G19
2 days
ago
E13
G19
E18
G22
E17
G23
E19
G28
E14
G27
E18
G28
E25
E23
G34
E30
G38
NE24
G32
NE27
G43
E30
G37
E24
G29
E14
G22
E12
G18
SE9
G16
SE9
G19
E15
G20
SE7
G15
SE13
G16
SE16
G22
SE15
G23
SE13
G22
SE13
G24

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Port Fourchon, LA10 mi64 minS 11 G 193.00 miA Few Clouds with Haze82°F77°F84%1013.5 hPa
Galliano, South Lafourche Airport, LA20 mi64 minS 10 G 1610.00 miOvercast83°F75°F79%1013.2 hPa

Wind History from XPY (wind in knots)
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hrS16
G24
S19
G27
S16
G28
S16
G26
S12
G28
S19
G31
S17
G29
S16
G26
S12
G25
S13
G20
S16
G22
S13
G20
S14
G20
S14S13
G20
S16S16
G21
S16
G23
S16
G24
S15
G22
S13
G19
S14
G21
S12
G20
S14
G21
1 day agoE18
G25
E17
G25
E21
G33
E20
G37
E26
G38
E26
G38
NE19
G31
E28
G36
NE29
G45
NE26
G39
NE30
G44
------------------------S18
G26
2 days ago----------------------------------------------E19
G24

Tide / Current Tables for Caminada Pass (bridge), Mississippi River Delta, Louisiana
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Caminada Pass (bridge)
Click for Map
Fri -- 05:39 AM CDT     Moonrise
Fri -- 06:02 AM CDT     Sunrise
Fri -- 11:09 AM CDT     1.22 feet High Tide
Fri -- 07:41 PM CDT     Moonset
Fri -- 08:02 PM CDT     Sunset
Fri -- 09:32 PM CDT     New Moon
Fri -- 10:37 PM CDT     -0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-00.10.20.40.50.70.811.11.21.21.21.110.80.60.40.20-0.1-0.2-0.3-0.3

Tide / Current Tables for Bayou Rigaud, Grand Isle, Mississippi River Delta, Louisiana
   EDIT      (on/off)   Help   One Week of Data
Bayou Rigaud
Click for Map
Fri -- 05:39 AM CDT     Moonrise
Fri -- 06:01 AM CDT     Sunrise
Fri -- 09:51 AM CDT     1.35 feet High Tide
Fri -- 07:41 PM CDT     Moonset
Fri -- 08:02 PM CDT     Sunset
Fri -- 09:29 PM CDT     -0.41 feet Low Tide
Fri -- 09:32 PM CDT     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.10.10.20.40.60.811.11.31.31.41.31.21.10.90.60.40.2-0.1-0.2-0.3-0.4-0.4-0.3

Weather Map and Satellite Images
       (on/off)   Help
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 (9,2,3,4)
      (on/off)   Help

Ground Weather Radar Station New Orleans/Baton Rouge, LA
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


Ad by Google

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.