Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Bayou Gauche, LA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:16AMSunset 7:38PM Sunday April 30, 2017 9:57 AM CDT (14:57 UTC) Moonrise 9:16AMMoonset 11:19PM Illumination 21% 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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GMZ530 Lake Pontchartrain And Lake Maurepas- 742 Am Cdt Sun Apr 30 2017
.small craft advisory in effect through this evening...
.tornado watch 181 in effect until 3 pm cdt this afternoon...
Today..South winds 25 knots wtih gusts to 35 knots. Waves 5 to 6 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the morning, then showers and Thunderstorms in the afternoon.
Tonight..South winds 20 to 25 knots easing to 15 to 20 knots then becoming northwest 10 to 15 knots in the late evening. Waves 3 to 6 feet. Dominant period 4 seconds. Showers and Thunderstorms likely in the evening, then chance of showers and Thunderstorms after midnight.
Monday..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Monday night..West winds 5 to 10 knots becoming north after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Tuesday..Southeast winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds.
Tuesday night..Southeast winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Wednesday..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Wednesday night..Southwest winds 20 to 25 knots. Waves 4 to 6 feet. Dominant period 4 seconds. Showers and Thunderstorms likely.
Thursday..Northwest winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers and Thunderstorms likely.
Thursday night..Northwest winds 20 to 25 knots. Waves 4 to 6 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 742 Am Cdt Sun Apr 30 2017
Synopsis..A strengthening strong cold front will affect the coastal waters through this evening. Another cold front is expected to impact the coastal waters again by mid week.

7 Day Forecast for Marine Location Near Bayou Gauche, LA
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location: 29.78, -90.42     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 300906
afdlix
area forecast discussion
national weather service new orleans la
406 am cdt Sun apr 30 2017

Short term
Strongly efficient rain producing thunderstorms west of the area
this morning. Large hail also being produced in some of this
activity within cooler lapse rates west of the area. Thinking
remains the same with respect to impacts and severity today. Wind
speeds will be one of the most noteable things today.

The cold front is just now starting to move into the prefrontal
area of sh/ts to the west. The activity ahead of the front will
wait on the front to begin transiting our area this morning. This
still puts the line of sh/ts moving into the northwest portion of
the area just before daylight. Just like the disturbance that is
causing the explosion of activity this morning, there looks to be
another similar disturbance that will do the same later this
evening as the front begins to clear southeast la.

Severe weather variables remain high today. The 4c inversion
yesterday weakened quite a bit at the 12z sounding Saturday which
would have been an issue. But there were two dynamically enhanced
inversions at 1500ft and another at 4kft. These two along with the
subsident dry air causing them to form, were the main variables
keeping sh/ts from developing. By yesterday evening the sounding
showed only one weak inversion of about 1c hanging on at 4kft.

But above that, it was not cooling at an average lapse
rate(regressive norm) for the atmosphere. This would have been a
weak inhibitor as well but it wouldn't have kept anything down if
capable of getting started but cumulative with the low level
inversion, it did help. Today we will see somewhat of a different
story as the lift along the front causes the inversion to lift
more and become more unstable.

Any thunderstorm activity that can produce 20-30mph winds by
momentum transfer to the sfc coupled with the already gradient
wind speeds of 25mph could easily produce 50+mph wind speeds along
the boundary today. This could cause damaging wind gusts, and
this should be the main hazard with any strong or severe
thunderstorms Sunday. Other severe weather parameters will not be
discounted but should not be as prevalent. An abundance of lightning
will be produced very easily by these storms through this
evening.

Rainfall amounts are still expected to be from 2 to 4 inches total
through through tonight. Most of this is expected with the
boundary as it moves through which would cause this to fall within
a relatively short period. Flooding of low lying and poor
drainage areas could be a problem today as well.

Coastal flooding is the next biggest item on the list. Areas that
normally receive salt water inundation during times of abnormal
high tide levels will receive water again today. Tide levels are
expected to be around 2ft above normal today. Highest levels will
be during times of high tide which will be from late morning
through the early afternoon hours today. Some of the lowest beach
and secondary paved routes may observe up to a foot of salt water
over those surfaces today.

Long term...

another round of sh/ts are expected Wednesday into Thursday
morning ahead of another cold front that should move through the
area Thursday morning. This could prove to be a wetter event with
its own round of strong to severe thunderstorms possible. We will
keep the main focus on one scenario at a time for the moment and
work this event as it unfolds and then swing that focus to mid-
week.

Long term
Northwest winsd on the back side of the mid-week front will cause
all advisories, watches and warnings to lower. This will deliver
some much needed nice weather before a large upper high over the
southwest moves east and brings on the heat by the beginning of
the next work week.

Aviation...

will introduce tsra for western portions of the area this
morning, including kmcb, kbtr and khdc. This package will spread
the mention of storms across the remaining terminals between 18z
today and 00z Monday, although storms could linger beyond that at
kgpt.

Winds will be a factor today with gusts to 30 knots or higher
at all terminals. This will especially be a problem for east-
west oriented runways. Expect winds to diminish after the passage
of the front through the day and overnight.

Marine...

a strong spring cold front is causing winds to become very strong
today with some gusts well over gale force. Will continue the
small craft advisory for all areas since sustained winds remain at
high end advisory. Very dangerous conditions for small craft will
continue until well after frontal passage later today. Waves near
6 feet in larger lakes, and 9 to 12 feet in the open gulf waters
can be expected ahead of the front. Once the front moves through,
winds will shift to the northwest late tonight into Monday. Winds
will remain high post front at around 20 knots and waters will
still be rough. Expect improving conditions by Tuesday as high
pressure builds and seas begin to calm. Another low pressure
system is expected to impact the coast towards Thursday and Friday
of next week.

Decision support...

dss code: blue.

Deployed: none.

Activation: none.

Activities: emergency management emails
monitoring convective threats for today.

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 77 51 79 54 / 100 30 0 0
btr 77 53 80 56 / 100 20 0 0
asd 81 57 80 57 / 100 70 0 0
msy 81 60 80 62 / 100 70 0 0
gpt 78 61 78 61 / 100 80 10 0
pql 81 59 79 55 / 100 90 10 0

Lix watches/warnings/advisories
La... Wind advisory until 7 pm cdt this evening for laz034>037-039-040-
046>050-056>072.

Coastal flood advisory until midnight cdt tonight for laz040-050-
058-060>064-066>070-072.

Gm... Small craft advisory until midnight cdt tonight for gmz530-532-
534-536-538-550-552-555-557-570-572-575-577.

Ms... Wind advisory until 7 pm cdt this evening for msz068>071-077-
080>082.

Coastal flood advisory until midnight cdt tonight for msz080>082.

Gm... Small craft advisory until midnight cdt tonight for gmz532-534-
536-538-550-552-555-557-570-572-575-577.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BYGL1 - 8762482 - Bayou Gauche, LA 1 mi40 min SSE 18 G 27 80°F 78°F1009.3 hPa
CARL1 18 mi40 min 69°F
FREL1 23 mi40 min SSE 19 G 25 80°F 1009.4 hPa74°F
NWCL1 - 8761927 - New Canal, LA 24 mi40 min S 9.9 G 16 80°F 77°F1011 hPa
SHBL1 - 8761305 - Shell Beach, LA 40 mi46 min SSE 20 G 29 79°F 78°F1011.3 hPa
GISL1 - 8761724 - Grand Isle, LA 43 mi40 min S 12 G 17 79°F 77°F1010.5 hPa
TESL1 - Tesoro Marine Terminal - 8764044 - Berwick, LA 44 mi40 min WNW 6 G 12 68°F 71°F1010.5 hPa
KXPY 47 mi23 min SSE 15 G 29 81°F 75°F

Wind History for West Bank 1, Bayou Gauche, LA
(wind in knots)    EDIT      (on/off)   Help
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Last
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SE14
G25
SE14
G23
SE14
G19
SE14
G21
SE13
G20
SE17
SE13
G20
SE15
SE14
G22
SE15
G21
SE11
G21
SE16
G23
SE13
G25
SE12
G17
SE15
G24
SE15
G20
SE19
G30
SE19
SE18
G28
SE15
G21
SE11
G23
SE17
G26
SE13
G28
SE16
G27
1 day
ago
S13
G19
S8
G17
S12
S11
G17
SE11
G21
S9
G19
SE9
G17
SE8
G14
SE9
G13
SE9
G14
SE10
G14
SE9
G12
SE11
G15
SE12
SE11
G17
SE12
G19
SE10
G15
SE12
SE12
G16
SE9
G16
SE10
G17
SE11
G18
SE12
G18
SE13
G21
2 days
ago
N2
N2
W3
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W3
G7
W3
SE7
G10
SE5
SE6
G10
SE7
SE6
G9
SE5
SE5
G9
E5
SE9
G15
SE9
G12
SE7
SE6
SE7
G11
SE9
G15
SE7
G12
SE7
G14
SE8
G14
S10
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans, New Orleans International Airport, LA16 mi65 minSSE 19 G 287.00 miOvercast and Breezy80°F73°F82%1010.4 hPa
Houma-Terrebonne, LA19 mi63 minSSE 18 G 295.00 miFog/Mist and Breezy81°F73°F79%0 hPa
New Orleans, Naval Air Station - Alvin Callender Field, LA21 mi63 minSSE 17 G 2710.00 miOvercast81°F75°F82%1009.9 hPa

Wind History from MSY (wind in knots)
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Last 24hrS18
G26
SE17
G28
SE19
G29
SE17
G27
SE18
G30
SE17
G31
S16
G26
SE16
G24
SE15
G24
SE17
G24
SE17
G23
SE18
G26
SE20
G27
SE19
G25
SE17
G24
SE19
G30
SE25
G34
SE21
G30
SE29
G35
SE19
G33
S17
G32
S22
G32
S16
G25
SE19
G28
1 day agoS13
G18
S13
G21
S10
G21
S13
G23
S13
G24
S19
G24
S12
G25
S15
G25
SE13
G23
SE14SE14SE12SE11SE12SE12SE11SE13SE12SE11SE14
G21
SE10SE13S14
G23
SE19
G27
2 days agoN8N9NW84NW4NW6NE6N6NE5E5E6SE11SE9SE9SE9SE8SE13S12SE11SE13
G20
SE14SE12
G20
S15
G22
S13
G19

Tide / Current Tables for West Bank 1, Bayou Gauche, Louisiana
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West Bank 1
Click for Map
Sun -- 03:09 AM CDT     0.22 feet High Tide
Sun -- 06:19 AM CDT     Sunrise
Sun -- 10:16 AM CDT     Moonrise
Sun -- 12:33 PM CDT     0.12 feet Low Tide
Sun -- 07:38 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.20.20.20.20.20.20.20.20.20.10.10.10.10.10.10.10.10.20.20.20.20.20.2

Tide / Current Tables for East Bank 1, Norco, Bayou Labranche, Louisiana
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East Bank 1
Click for Map
Sun -- 06:19 AM CDT     Sunrise
Sun -- 10:15 AM CDT     Moonrise
Sun -- 11:09 AM CDT     0.03 feet Low Tide
Sun -- 07:38 PM CDT     Sunset
Sun -- 11:43 PM CDT     0.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.30.30.20.20.20.10.10000.10.10.10.20.20.30.30.40.40.40.4

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.