Friday, September25, 2020
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Marine Weather and Tides
Venice, LA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:49AMSunset 6:54PM Friday September 25, 2020 7:24 PM CDT (00:24 UTC) Moonrise 3:23PMMoonset 12:56AM Illumination 63% Phase: Waxing Gibbous; Moon at 9 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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GMZ552 Expires:202009260915;;356085 Fzus54 Klix 252025 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 325 Pm Cdt Fri Sep 25 2020 Pascagoula To Atchafalaya River Out To 60 Mile Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest Ten Percent Of The Waves. Gmz550-552-260915- 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- 325 Pm Cdt Fri Sep 25 2020
Tonight..East winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 5 seconds.
Saturday..Southeast winds 5 to 10 knots. Seas 1 foot or less. Dominant period 5 seconds.
Saturday night..South winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds.
Sunday..South winds 5 to 10 knots. Seas 1 foot or less. Dominant period 4 seconds. Slight chance of showers and isolated Thunderstorms.
Sunday night..South winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers through the night. Isolated Thunderstorms after midnight.
Monday..Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds. Chance of showers in the morning. Chance of Thunderstorms through the day. Showers likely in the afternoon.
Monday night..West winds 5 to 10 knots becoming north 15 to 20 knots in the late evening. Seas 2 to 4 feet. Dominant period 5 seconds. Waves or seas building to 3 to 6 feet with occasional seas to 6 feet. Dominant period 5 seconds after midnight. Showers likely and chance of Thunderstorms.
Tuesday..North winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms in the morning.
Tuesday night..North winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Wednesday..Northwest winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
Wednesday night..North winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 325 Pm Cdt Fri Sep 25 2020
Synopsis..A cold front is forecast to move through the coastal waters this weekend with a reinforcing front to follow by mid week next week. High pressure settles over the northern gulf for much of the remainder of the weekend.


7 Day Forecast for Marine Location Near Venice, LA
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location: 28.94, -89.4     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 252022 AFDLIX

AREA FORECAST DISCUSSION National Weather Service New Orleans LA 322 PM CDT Fri Sep 25 2020

SHORT TERM. Very dry airmass remains in place across the CWA with weak surface building in from the the north. This morning's sounding showed a very dry column above 750mb with just a very shallow layer of moisture to support clouds. Closer to the coast, that moist layer appears to be slightly thicker. A stray shower or 2 will be possible but not enough coverage to justify any mention of POPs in the forecast. That thinking carries over into Saturday but with coverage bumping up into the 20% category as higher PW region over the GOM creeps northward. Thus have a smaller portion of showers generally south of I10 in LA. From a temp perspective, highs will be moderating back into the mid to upper 80s. The absolute high's in the forecast are actually still right at to just below normal. NBM may be too cold and may need to increase them above this guidance.

The surface ridge to the north will slide east on Sunday. This will allow winds to shift around to the south and thus should see dewpoints rising back up into the 70s. If you take that at face value, you'd think rain chances will certainly come up as well. If the GFS is right, that moisture increase will only be at the surface as dry air will be moving in aloft. It suggests PW's less than 1". That environment will not support convection. With ECMWF not showing precip for most of the CWA, went below NBM POP's and not showing rain in the forecast for Sunday. Temps should be normal in the upper 80s.

LONG TERM. The first REAL cold front looks to be coming through the forecast area Monday evening/night. Neither the GFS nor the ECMWF show a particularly sharp upper level trough, but rather one splitting into 2 section by Tuesday. Looking at the upper level soundings, there appears to be a small window of opportunity for severe storms right along the frontal boundary. It looks like a high CAPE - low shear environment. From a climatology perspective, we may have a fair chance to see hail and tornadoes. It's still several days out, so we'll need to watch for the potential for an over achieving event.

After FROPA, the local area will see outstanding weather with lows in the 50s and highs in the 70s. While you're enjoying that great weather, remember that hurricane season isn't close to be over and fronts that stall in the Gulf of Mexico sometimes eventually develop into tropical systems.

MEFFER

AVIATION. MVFR and VFR ceilings are expected to continue through the evening. Brief period of IFR ceilings associated with fog is forecast for MCB Saturday morning and then MVFR and VFR conditions will resume through the period./TDB/

MARINE. Winds have been light today and should continue through the evening and weekend. Cold front is forecast to move through the coastal waters this weekend and a reinforcing front by middle of next week. We will see winds increase to moderate levels as soon as Monday due to cold air advection as the second front moves offshore. /TDB/

PRELIMINARY POINT TEMPS/POPS. MCB 65 83 69 85 / 0 10 0 10 BTR 66 85 69 86 / 0 10 0 10 ASD 65 84 69 85 / 0 10 0 10 MSY 70 83 71 85 / 0 10 0 10 GPT 67 82 71 85 / 0 10 10 10 PQL 66 87 70 88 / 0 10 10 10

LIX WATCHES/WARNINGS/ADVISORIES. LA . Coastal Flood Advisory until noon CDT Saturday for LAZ040-049- 050-058-060>062-072.

GM . None. MS . Coastal Flood Advisory until noon CDT Saturday for MSZ080.

GM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 1 mi55 min ENE 9.9 G 12 83°F 85°F1012.6 hPa
BURL1 - Southwest Pass, LA 3 mi85 min 6 G 7
KDLP 15 mi30 min E 12 81°F 72°F
PILL1 18 mi55 min ENE 6 G 8 77°F 81°F1014.4 hPa
42093 24 mi29 min 83°F2 ft
KMDJ 29 mi30 min
LOPL1 - Louisiana Offshore Oil Port, LA 33 mi46 min NE 6 G 8 78°F 1 ft1015.1 hPa68°F
GISL1 - 8761724 - Grand Isle, LA 37 mi55 min 5.1 G 7 82°F
KXPY 44 mi30 min Calm 79°F 70°F

Wind History for Pilots Station East, SW Pass, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KBVE

Wind History from BVE (wind in knots)
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1 day agoS12SW12SW12S11S10S9S12S10S10S8S9S9S10S10S9S9SW10SW13N11
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2 days agoNE7NE6NE5E4NE5E3CalmCalmCalmSE3CalmCalmN3CalmSE3SE4S7S6S9S8S10S11S11S12

Tide / Current Tables for Southwest Pass, Mississippi River Delta, Louisiana (2)
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Southwest Pass
Click for Map
Fri -- 12:55 AM CDT     Moonset
Fri -- 03:09 AM CDT     1.89 feet High Tide
Fri -- 06:47 AM CDT     Sunrise
Fri -- 02:58 PM CDT     0.15 feet Low Tide
Fri -- 03:22 PM CDT     Moonrise
Fri -- 06:49 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.71.81.91.91.81.61.51.210.80.60.40.30.20.20.20.20.40.50.70.811.2

Tide / Current Tables for Joseph Bayou, Mississippi River Delta, Louisiana
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Joseph Bayou
Click for Map
Fri -- 12:54 AM CDT     Moonset
Fri -- 03:11 AM CDT     2.04 feet High Tide
Fri -- 06:47 AM CDT     Sunrise
Fri -- 02:54 PM CDT     0.16 feet Low Tide
Fri -- 03:22 PM CDT     Moonrise
Fri -- 06:49 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.92221.91.81.61.31.10.80.60.40.30.20.20.20.30.40.50.70.91.11.3

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station New Orleans/Baton Rouge, LA
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Gulf Stream Current



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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 numerous 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.