Marine Weather and Tides
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 6:51AM||Sunset 7:03PM||Wednesday September 20, 2017 8:04 AM CDT (13:04 UTC)||Moonrise 6:11AM||Moonset 6:40PM||Illumination 0%|
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|GMZ435 Vermilion Bay- 315 Am Cdt Wed Sep 20 2017 |
Today..South winds 5 to 10 knots. Bay waters a light chop. Slight chance of showers and Thunderstorms in the morning, then chance of showers and Thunderstorms in the afternoon.
Tonight..South winds 5 to 10 knots. Bay waters a light chop. Slight chance of showers and Thunderstorms in the evening.
Thursday..Southeast winds around 5 knots. Bay waters smooth. Slight chance of showers and Thunderstorms in the afternoon.
Thursday night..Southeast winds up to 5 knots. Bay waters smooth. Slight chance of showers and Thunderstorms through the night.
Friday..East winds around 5 knots. Bay waters smooth. Slight chance of showers and Thunderstorms in the afternoon.
Friday night..Southeast winds around 5 knots. Bay waters smooth. Slight chance of showers and Thunderstorms after midnight.
Saturday..East winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Saturday night..East winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Sunday..East winds 5 to 10 knots. Bay waters a light chop. Chance of showers and Thunderstorms.
Sunday night..East winds 5 to 10 knots. Bay waters a light chop. Slight chance of showers and Thunderstorms.
|GMZ400 Synopsis For Lower Atchafalaya River La To High Island Tx Out 60 Nm Including Sabine And Calcasieu Lakes And Vermilion Bay 315 Am Cdt Wed Sep 20 2017 |
Synopsis.. Weak high pressure will continue to hold over the northwest gulf, yielding light winds and low seas. Flow will remain onshore through mid-week, trending more easterly going into the weekend. Any shower or Thunderstorm activity will remain limited.
7 Day Forecast for Marine Location Near New Roads, LAHourly EDIT Help
Area Discussion for - New Orleans/Baton Rouge, LA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus64 klix 200842|
area forecast discussion
national weather service new orleans la
342 am cdt Wed sep 20 2017
A broad and weak upper level trough axis extending along the
southeastern coast and into the gulf south will be the main
feature impacting the forecast through Friday. The weak trough
axis aloft will provide just enough upper level forcing to
overcome some weak convective inhibition in the mid-levels. In
the low levels a typical seabreeze cycle will also serve as a
catalyst for the weather expected over the next few days. Expect
to see convection fire up along the seabreeze front from late
morning through the afternoon hours each day. As temperatures wane
and seabreeze weakens in the evening hours, overall convective
activity will also decrease. In fact, the overnight hours should
remain fairly dry both tonight and tomorrow night.
Another driver of our weather will be an increase in overall
atmospheric moisture content both today and tomorrow. Precipitable
water values will range around 1.9 to 2.1 inches through Friday,
and this will allow for slightly more convective coverage through
the short term period. Have chance pops of 30 to 40 percent in the
forecast each afternoon. Temperatures will remain slightly warmer
than average during the daytime hours with highs in the lower 90s
expected across most areas due to continued weak mid-level
subsidence. The increase in atmospheric moisture and dewpoints
will also keep overnight lows somewhat elevated in the lower to
middle 70s. With light boundary layer winds and ample moisture in
place, some patchy fog can be expected to develop each night.
Over the weekend, a broad and weak closed upper level low should
form on the tail end of the broad trough extending across the
southeast conus. This weak upper level low will keep some
increased omega and forcing in place in the upper levels. Overall,
little change in the sensible weather pattern is expected from
Saturday through Monday from that seen today through Friday. A
seabreeze cycle will continue to dominate the low level weather
pattern, and expect to see scattered showers and thunderstorms
fire up on the seabreeze front beginning in the late morning and
persisting through the afternoon hours. As the seabreeze weakens
due to the loss of differential heating in the evening, convective
activity will also wane. The overnight hours should remain dry,
and some patchy fog could develop each night as boundary layer
flow remains weak. The one big change will be a return to more
normal temperatures as the mid-level ridge and resultant
subsidence comes to an end in response to the upper level low
translating down into the mid-levels. Highs in the upper 80s and
lows in the upper 60s and lower 70s can be expected.
By Tuesday and Wednesday of next week, the broad upper level low
over the area should shift to the north and east as a ridge of
high pressure begins to move in from the west. A deep layer ridge
axis should be firmly in place by Tuesday afternoon, and expect to
see a reduction in precipitable water values to around 1.5 inches
as subsidence increases throughout the atmospheric column. A
strong mid-level cap will also inhibit most convective initiation
throughout the day both Tuesday and Wednesday. As a result, have a
very low pop of less than 20 percent in the forecast. At most, an
isolated shower or thunderstorm may try to form, but the chances|
are very low of that occurring. Temperatures will also warm back
into the lower 90s in the afternoon in response to the increased
subsidence and lack of cloud development. However, the drier
airmass will also allow temperatures to cool to more normal levels
at night in the upper 60s and lower 70s. As a result, some patchy
fog could continue to form each night.
As temps climb and lows reach mid 70s fg will be tougher
to come by. But br will still remain a nightly restriction and will
vary from around 1sm up to 5sm. There is a 30% chance of sh ts
activity today. But any particular site being affected will be
relatively small and mention will only be made for those that will
have the best opportunity at getting that 30%.
High pressure will remain across the eastern half of the
gulf keeping winds weak and southerly. These conditions are expected
to be maintained through the weekend.
Dss code: green.
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 91 70 91 69 30 10 30 20
btr 92 71 92 71 30 10 40 20
asd 91 72 90 70 30 10 30 20
msy 91 74 91 74 30 10 30 20
gpt 90 73 89 72 30 10 30 20
pql 90 71 90 70 20 10 30 20
Lix watches warnings advisories
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|BYGL1 - 8762482 - Bayou Gauche, LA||83 mi||46 min||Calm G 1||78°F||84°F||1015.8 hPa|
Wind History for Tesoro Marine Terminal, LA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|New Roads False River Regional Airport, LA||2 mi||69 min||N 0||4.00 mi||Fog/Mist||73°F||72°F||99%||1015.2 hPa|
|Baton Rouge, Baton Rouge Metropolitan, Ryan Field, LA||19 mi||71 min||N 0||5.00 mi||Fog/Mist||74°F||73°F||97%||1015 hPa|
Wind History from HZR (wind in knots)
|1 day ago||Calm||Calm||Calm||S||S||S||S||S||S||Calm||S||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
|2 days ago||Calm||Calm||Calm||Calm||NE||N||Calm||E||N||Calm||Calm||Calm||S||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Weeks Bay |
Click for Map
Wed -- 12:30 AM CDT New Moon
Wed -- 01:19 AM CDT 0.59 feet Low Tide
Wed -- 06:54 AM CDT Sunrise
Wed -- 07:05 AM CDT 1.70 feet High Tide
Wed -- 07:13 AM CDT Moonrise
Wed -- 01:39 PM CDT 1.00 feet Low Tide
Wed -- 06:51 PM CDT 1.76 feet High Tide
Wed -- 07:05 PM CDT Sunset
Wed -- 07:41 PM CDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Stouts Pass At Six Mile Lake |
Click for Map
Wed -- 12:30 AM CDT New Moon
Wed -- 01:34 AM CDT 0.14 feet Low Tide
Wed -- 06:52 AM CDT Sunrise
Wed -- 07:10 AM CDT Moonrise
Wed -- 08:02 AM CDT 0.74 feet High Tide
Wed -- 01:39 PM CDT 0.29 feet Low Tide
Wed -- 07:03 PM CDT Sunset
Wed -- 07:39 PM CDT Moonset
Wed -- 08:01 PM CDT 0.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Southeast EDIT
Wind Forecast for New Orleans/Baton Rouge, LA (9,2,3,4)(on/off)  Help
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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.