Wednesday, April26, 2017 L-36.com


Marine Weather and Tides
Violet, 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 6:19AMSunset 7:35PM Wednesday April 26, 2017 6:57 AM CDT (11:57 UTC) Moonrise 6:40AMMoonset 7:58PM Illumination 0% Phase: New Moon; Moon at 0 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
GMZ534 Lake Pontchartrain And Lake Maurepas-lake Borgne- 359 Am Cdt Wed Apr 26 2017
.small craft exercise caution in effect through late tonight...
Today..South winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Tonight..Southwest winds 15 to 20 knots becoming northwest after midnight. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the evening, then showers and Thunderstorms likely after midnight.
Thursday..Northwest winds 5 to 10 knots becoming south late in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds.
Thursday night..South winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds.
Friday..South winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds.
Friday night..Southeast winds 10 to 15 knots. Waves 2 to 3 feet. Dominant period 4 seconds.
Saturday..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Saturday night..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Sunday..Southwest winds 20 to 25 knots. Waves 4 to 6 feet. Dominant period 4 seconds. Showers and Thunderstorms.
Sunday night..Northwest winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 359 Am Cdt Wed Apr 26 2017
Synopsis..A strengthening low pressure system in the plains will move through the mid-mississippi valley today. This low will push a weak front toward the coast tonight and Thursday. The front should stall as it enters the coastal waters. Another low pressure system should then move into the plains on Friday and impact the coastal waters late in the weekend.

7 Day Forecast for Marine Location Near Violet, LA
   Hourly   EDIT   Help
location: 29.97, -89.7     debug


Area Discussion for - New Orleans/Baton Rouge, LA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 klix 260847
afdlix
area forecast discussion
national weather service new orleans la
347 am cdt Wed apr 26 2017

Short term
A broad upper level trough is digging southeast across the southern
rockies and beginning to sharpen. It will quickly move into and
through the central plains throughout the day. Models are in good
agreement that the trough will then lift northeast towards the great
lakes this evening and tonight. A frontal boundary associated with
the upper trough will be the focus for shower and thunderstorm
activity that moves through the cwa. Convection should be on the
northwestern doorstep of the forecast area Thursday at 00z and
exiting eastern areas around sunrise Thursday. The typical pop
coverage in similar weather patterns is more and stronger storms
along the la/ms border and minimal along the la coast(example: the
last system that just moved through). The current pop forecast is
based on that scenario with 80% in southwest mississippi and 20% in
southern plaquemines parish. The threat for severe weather will be
in a similar with the best probabilities north of i-12 and minimal
threat on the coast. Model soundings show this as well with a mid
level warm nose that doesn't erode and much weaker winds in the
column at points further south than north. Ml CAPE values over
2000j/kg, li's -6 to -8 combined with shear over 40 knots will be
sufficient for severe thunderstorms in those northern areas. Current
spc day 1 shows slight risk northwest of of a btr to mcb line and
marginal for points south of there. In addition, the intensity of
storms should be on a downward trend as they progress through the
eastern half of the CWA early tomorrow morning. This makes sense
with the trough lifting further away, and taking the stronger wind
field with it.

Long term
Post frontal upper level ridge will be expanding over the
southeastern united states on Friday. Temperatures will respond by
moderating well into the 80s for the afternoon highs. Moisture will
begin to surge in as well as southeast flow strengthens. Low to mid
70 degree dewpoints will engulf the CWA by the afternoon.

The second and likely more impactful event of this forecast period
will be rolling through during the second half of this weekend. An
upper trough will be closing a low and rotating negative as it digs
well into texas and the lower mississippi valley Saturday into
Sunday. A wide swath of showers and embedded strong/severe
thunderstorms will march across the state on Sunday. Surface winds
look to be strong Saturday and Saturday night as a sub-1000mb
surface low develops over texas. This will continue to bring
increased moisture well past the cwa. CAPE values will likely be
over 2000 j/kg as moisture and temps stay high while mid level temps
drop from the approaching deep trough. That type of moisture and
instability combined with a 50+kt mid level jet may set the stage
for quite a bit severe weather and maybe a few significantly strong
cells. All modes of severe weather possible although tornadoes and
wind seem to be the more likely threats. Timing is the biggest ??
attm as now the ECMWF is slower than the gfs. Will likely see
fluctuations until the event occurs.

Dry and cooler temps expected early next week as post frontal
surface high pressure builds in. A progressive upper level pattern
in general will likely bring the threat for rain back into the
forecast fairly quickly.

Meffer

Aviation
Sct-bkn015 will move into each terminal today. This will become an
ovc035 by early evening. Winds will become gusty from the south
today as south winds of 15 to 20 knots with higher gusts are
expected. Some low level ovc005 ceilings may occur overnight as the
sh/ts begin to move in as well.

Marine
An increasing pressure gradient over the coastal waters related to a
deepening low pressure system in the southern plains will result in
exercise caution conditions over all waters through 4pm today. As
winds rise in advance of the front, advisory conditions will start
at 4pm and last through at least 4am Thursday. Winds on the back
side of this front are expected to collapse rapidly and all flags
should be able to lower after 9z Thursday. As a cold front stalls
over the northern gulf tonight and Thursday, winds will remain
rather weak until Thursday night as flow will become established
once again out of the south ahead of the next much stronger cold
front expected to move through Sunday night in to Monday morning.

Winds will rise enough to become high end advisory conditions but
may actually become strong enough for gale conditions or at least
gusts to gale force by as early as Saturday night. As the front
moves through Monday morning, winds will shift to northwest and
remain at around 20-25kt early Thursday. Winds will ease through the
morning with all flags possibly dropping by noon or shortly
after.

Decision support
Dss code... Green.

Deployed... None.

Activation... None.

Activities... None.

Decision support service (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 of severe weather;
nearby tropical events, hazmat or other large episodes
red = full engagement for moderate risk of severe weather; direct
tropical threats; events of national significance.

Preliminary point temps/pops
Mcb 85 55 83 65 / 10 80 0 10
btr 87 58 84 67 / 10 70 0 10
asd 84 63 85 71 / 0 70 10 10
msy 85 63 84 72 / 0 60 10 10
gpt 78 66 83 74 / 0 70 20 10
pql 77 65 84 69 / 0 70 30 10

Lix watches/warnings/advisories
La... None.

Gm... Small craft advisory from 4 pm this afternoon to 4 am cdt
Thursday for gmz532-536-538-550-552-555-557-570-572-575-577.

Ms... None.

Gm... Small craft advisory from 4 pm this afternoon to 4 am cdt
Thursday for gmz536-538-550-552-555-557-570-572-575-577.



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
SHBL1 - 8761305 - Shell Beach, LA 7 mi40 min SSE 11 G 13 69°F 74°F1006.1 hPa
NWCL1 - 8761927 - New Canal, LA 22 mi40 min S 6 G 12 71°F 73°F1005.5 hPa
CARL1 23 mi40 min 66°F
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 32 mi40 min S 16 G 20 70°F 73°F1005.9 hPa
FREL1 39 mi40 min S 6 G 8.9 72°F 1004.4 hPa63°F
BYGL1 - 8762482 - Bayou Gauche, LA 40 mi40 min SE 4.1 G 7 70°F 74°F1005.4 hPa

Wind History for Shell Beach, LA
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
-12
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
Last
24hr
SW6
W6
W7
SW8
G12
S9
G14
SW12
G17
SW11
G16
S10
G13
S10
G15
S9
G14
S10
G15
S8
G11
S8
G11
S6
S6
S7
S6
S7
S8
S8
SE8
G11
SE6
SE8
G12
1 day
ago
W11
W10
NW12
G16
NW16
G20
NW18
G22
NW20
NW17
G22
NW16
W17
NW15
NW12
G16
W12
W10
W6
SW5
SW5
SW7
SW7
W9
G12
W10
SW5
SW8
SW6
W5
2 days
ago
NW15
G19
NW15
NW13
G16
NW14
G17
NW15
G19
N18
NW16
NW12
G18
NW17
NW17
G21
NW22
G27
NW22
N24
G29
N24
G30
N19
N16
G20
NW14
G20
NW16
G22
NW18
G22
NW15
NW14
G17
NW12
G16
NW14
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans, New Orleans Lakefront Airport, LA18 mi65 minSSE 710.00 miOvercast70°F63°F79%1005 hPa
New Orleans, Naval Air Station - Alvin Callender Field, LA20 mi63 minN 010.00 miOvercast71°F63°F76%1005.3 hPa

Wind History from ASD (wind in knots)
7
AM
8
AM
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
Last 24hrCalmCalmCalm6S8S9SW7--5S9S11S11S8S6S9S7S7S5SE4CalmS3S5S6S9
1 day agoCalmNW34NW9
G15
NW9NW8
G18
N10
G16
NW8
G21
--N9
G14
4NW7CalmCalmCalmCalmCalmCalmCalmS4CalmCalmCalmCalm
2 days agoN4NW4NW6N7N11
G17
N9
G18
N10
G17
NW10NW7NW9
G16
N12
G19
N12
G16
N7N6N3CalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Shell Beach
Click for Map
Wed -- 12:35 AM CDT     0.12 feet Low Tide
Wed -- 06:20 AM CDT     Sunrise
Wed -- 06:40 AM CDT     Moonrise
Wed -- 07:18 AM CDT     New Moon
Wed -- 02:38 PM CDT     1.14 feet High Tide
Wed -- 07:32 PM CDT     Sunset
Wed -- 07:57 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.20.20.30.40.50.60.60.70.80.911.11.11.11.110.90.70.60.40.20.1

Tide / Current Tables for Chef Menteur, Chef Menteur Pass, Louisiana
   EDIT      (on/off)   Help   One Week of Data
Chef Menteur
Click for Map
Wed -- 12:05 AM CDT     0.19 feet Low Tide
Wed -- 06:20 AM CDT     Sunrise
Wed -- 06:41 AM CDT     Moonrise
Wed -- 07:18 AM CDT     New Moon
Wed -- 03:25 PM CDT     1.05 feet High Tide
Wed -- 07:33 PM CDT     Sunset
Wed -- 07:58 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.20.30.30.40.50.60.60.70.70.80.80.9111.1110.90.80.60.40.30.2

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 (7,2,3,4)
      (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.