Saturday, November18, 2017 L-36.com


Marine Weather and Tides
Chalmette, 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 6:27AMSunset 5:03PM Saturday November 18, 2017 9:50 AM CST (15:50 UTC) Moonrise 7:26AMMoonset 6:33PM 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
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GMZ534 Lake Borgne- 848 Am Cst Sat Nov 18 2017
.small craft advisory in effect from this evening through Sunday morning...
Rest of today..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Waves or seas building to 3 to 5 feet with occasional waves to 5 feet. Dominant period 4 seconds in the afternoon.
Tonight..Southwest winds near 15 knots becoming northwest late in the evening, then becoming north 20 to 25 knots after midnight. Waves 2 to 4 feet. Dominant period 4 seconds. Waves or seas building to 3 to 6 feet with occasional waves to 6 feet. Dominant period 4 seconds after midnight. Chance of showers in the evening.
Sunday..North winds 20 to 25 knots easing to 10 to 15 knots in the afternoon. Waves 3 to 5 feet with occasional waves to 6 feet. Dominant period 4 seconds. Waves or seas subsiding to 2 to 4 feet. Dominant period 4 seconds in the afternoon.
Sunday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Monday..East winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday night..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday..East winds near 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers.
Tuesday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers.
Wednesday..North winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Wednesday night..North winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 848 Am Cst Sat Nov 18 2017
Synopsis..Ridge of high pressure will slowly shift east today. A strong cold front is expected to sweep through the north gulf waters tonight. Strong winds are expected this afternoon through Sunday. High pressure will then build in for Sunday and Monday. Another low pressure system may begin to affect the waters by Tuesday.

7 Day Forecast for Marine Location Near Chalmette, LA
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location: 30, -89.93     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 181005
afdlix
area forecast discussion
national weather service new orleans la
405 am cst Sat nov 18 2017

Short term
An upper level trough currently digging south and east across the
central plains will amplify throughout the day. A cold front
associated with this feature will begin moving into northwestern
portions of the CWA later this afternoon. Most rainfall activity
will be post frontal. In this scenario, thunderstorm development is
much less likely due to limitation of instability. Although not a
zero chance, the probability appears to be too low for any mention
of thunder in the zones. Therefore, pulled all mention of tstrm from
the forecast. Also, made adjustments on timing of the start of
showers to a later time based on latest meso and medium range
guidance. They generally suggested a later start for precip, aftn
and evening.

Models show very strong high pressure building into the area behind
the front. This is indicative of substantially cold air mass. A
significant drop in temperatures is expected tonight through Monday.

Highs will struggle to reach 60 degrees and lows will drop into the
30s and 40s for much of the area. The coldest will be Monday morning
with the potential for a few locations to touch freezing. The latest
forecast temps are essentially the same as the previous which is a
couple degrees below guidance.

Long term
Considerable differences in model solutions beyond Tuesday lowers
forecast confidence. Although they generally suggest a trough of
some sort will impact the area, the track of this system is quite
uncertain. Thus didn't make too many changes in the extended
forecast.

Meffer

Aviation
South flow of 5 to 10 knots was present over the area at 3 am. This
feature limited fog development and not expected fog to become
widespread or dense. Most locations are forecast to only fall into
MVFR category. Moist southwest flow in advance of the strong cold
front will result in some MVFR CIGS throughout much of the day for
much of the area on Saturday, and have carried prob30 to account for
the chance of showers ahead of the front Saturday afternoon and
evening. Stronger southwest winds of 11 to 17 knots with gusts over
20 knots will pick up in the afternoon and early evening Saturday,
then stronger northwest to north winds are expected after the
frontal passage Saturday evening and overnight. Winds are expected
to be stronger south of tidal lakes with wind speeds of 20 to 25
knots 06z Sun to 18z Sun for knew and kmsy. 18

Marine
Southerly winds are expected to increase to 15 to 20 knots. Increased
gradient flow from the south and southwest in advance of the
approaching front will push winds into exercise caution range this
morning through this evening. A strong cold front is expected to
push across the coastal waters this evening. After the front passes,
winds will quickly shift to the northwest, and will also increase
into small craft advisory and possibly gale warning range. Will
maintain small craft advisory tonight through Sunday and gale watch
overnight. Seas will also increase as the winds rise to nearly 30
knots, and have placed seas of 7 to 10 feet in the open gulf waters
from late tonight into Sunday.

High pressure will settle over the area by Monday and winds and seas
should begin to dissipate. The high is expected to move to the east
by Tuesday, and a prevailing southeast to east flow of 15 knots
should set up across the waters Tuesday through Wednesday. A surface
low may develop over the central gulf with brisk winds becoming
north by Wednesday. 18

Decision support
Dss code: green.

Deployed: none.

Activation: none.

Activities: none.

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 80 44 58 32 20 40 0 0
btr 81 46 61 33 20 40 0 0
asd 81 49 61 32 20 50 0 0
msy 81 54 61 43 20 50 0 0
gpt 77 51 61 37 10 50 0 0
pql 79 49 61 31 10 50 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory from noon today to midnight cst tonight for
gmz550-552-555-557-570-572-575-577.

Small craft advisory from 9 am to noon cst Sunday for gmz550-552-
555-557.

Gale warning from midnight tonight to 9 am cst Sunday for gmz550-
552-555-557-570-572-575-577.

Small craft advisory from 9 am to 3 pm cst Sunday for gmz570-572-
575-577.

Small craft advisory from 9 pm this evening to noon cst Sunday
for gmz536-538.

Small craft advisory from 9 pm this evening to 9 am cst Sunday
for gmz530-532-534.

Ms... None.

Gm... Small craft advisory from noon today to midnight cst tonight for
gmz552-555-557-570-572-575-577.

Small craft advisory from 9 am to noon cst Sunday for gmz552-555-
557.

Gale warning from midnight tonight to 9 am cst Sunday for gmz552-
555-557-570-572-575-577.

Small craft advisory from 9 am to 3 pm cst Sunday for gmz572-575-
577.

Small craft advisory from 9 pm this evening to noon cst Sunday
for gmz538.

Small craft advisory from 9 pm this evening to 9 am cst Sunday
for gmz532-534.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OSTF1 - Stennis Test Facility 30 mi61 min S 5.8 G 12 73°F 1014.4 hPa (+0.9)67°F

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans, New Orleans Lakefront Airport, LA6 mi58 minS 1210.00 miFair75°F66°F76%1013.5 hPa
New Orleans Naval Air Station - Alvin Callender Field, LA13 mi2.9 hrsSSW 410.00 miA Few Clouds66°F66°F100%1013.6 hPa
New Orleans, New Orleans International Airport, LA17 mi58 minS 1110.00 miMostly Cloudy76°F69°F79%1014.2 hPa

Wind History from NEW (wind in knots)
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Last 24hrNE6S8S11SW9S10S11S10S9S7S9S7S6S7S8S9S8S8S8S8S7S7S7S10S12
1 day agoNE4N5N7N7N6NE5E7E5SE3S6SE5S4S4SW4SE3SE3CalmCalmCalmSE3E4E4E4NE3
2 days agoE9E8E9E8E9E7E10E7E8E6SE6E4----CalmE3E3E3SE3E3E3E4E4E4

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Sat -- 02:05 AM CST     1.13 feet High Tide
Sat -- 05:42 AM CST     New Moon
Sat -- 06:26 AM CST     Moonrise
Sat -- 06:27 AM CST     Sunrise
Sat -- 01:32 PM CST     0.01 feet Low Tide
Sat -- 05:02 PM CST     Sunset
Sat -- 05:33 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.11.11.11.110.80.70.50.40.20.100000.10.20.30.40.50.60.80.9

Tide / Current Tables for Chef Menteur, Chef Menteur Pass, Louisiana
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Chef Menteur
Click for Map
Sat -- 01:54 AM CST     1.27 feet High Tide
Sat -- 05:42 AM CST     New Moon
Sat -- 06:25 AM CST     Moonrise
Sat -- 06:26 AM CST     Sunrise
Sat -- 12:16 PM CST     0.15 feet Low Tide
Sat -- 05:01 PM CST     Sunset
Sat -- 05:33 PM CST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.31.31.21.210.90.70.50.40.30.20.20.20.20.30.40.50.60.70.80.911.1

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 (10,2,3,4)
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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.