Tuesday, September22, 2020
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L-36.com

Marine Weather and Tides
Woodmere, 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 6:47AMSunset 6:59PM Monday September 21, 2020 11:39 PM CDT (04:39 UTC) Moonrise 10:24AMMoonset 9:19PM Illumination 24% 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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GMZ534 Lake Borgne- 1002 Pm Cdt Mon Sep 21 2020
.small craft advisory in effect through Wednesday morning...
Rest of tonight..East winds 20 to 25 knots. Waves 3 to 6 feet. Dominant period 4 seconds. Chance of showers.
Tuesday..East winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Chance of showers in the morning, then showers likely and slight chance of Thunderstorms in the afternoon.
Tuesday night..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers likely.
Wednesday..Southeast winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers likely through the day. Chance of Thunderstorms in the late morning and afternoon.
Wednesday night..South winds 15 to 20 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of Thunderstorms early in the evening. Showers likely through the night. Chance of Thunderstorms after midnight.
Thursday..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Showers likely and chance of Thunderstorms.
Thursday night..South winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Friday..Southeast winds near 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and slight chance of Thunderstorms.
Friday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of Thunderstorms in the evening. Chance of showers through the night.
Saturday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Saturday night..South winds 5 to 10 knots becoming west after midnight. Waves 1 to 2 feet. Slight chance of Thunderstorms in the evening. Chance of showers through the night.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1002 Pm Cdt Mon Sep 21 2020
Synopsis..Tropical storm beta, located over the western gulf of mexico, is slowly but steadily approaching the texas coast with landfall expected tonight through early Tuesday. Meanwhile, high pressure over the eastern u.s. Is interacting with the circulation of beta to provide strong easterly flow across the coastal waters. Refer to the latest advisories issued by the national hurricane center regarding tropical storm beta.


7 Day Forecast for Marine Location Near Woodmere, LA
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location: 29.82, -90.06     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 220427 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA Issued by National Weather Service Jacksonville FL 1130 PM CDT Mon Sep 21 2020

06Z AVIATION TAF PACKAGE.

Widespread IFR CIGS/VSBYS will develop at all TAF sites as moisture ahead of TS BETA overspreads the region and rainfall develops and becomes moderate to locally heavy at times. Still some chance of TSRA at KHUM and have included VCTS at 12z and predominant TSRA from 16Z-22Z time frame. East winds in the 8-14 knot range at the moment will increase to 12-20 knots with occasional gusts to 20-30 knots at times through the day on Tuesday.

PREV DISCUSSION. /issued 443 PM CDT Mon Sep 21 2020/

SHORT TERM (Tonight through Tuesday Night) .

Much to discuss to start off a new work week. Taking a quick synoptic overview across the southeastern United States places all focus on Tropical Storm Beta - soon to make landfall along the Texas coastline this afternoon/evening. East of Beta across the northern Gulf remains a strong southerly low to mid-level flow anchored in place helping to surge moisture north all across the northern Gulf coast. PW's remain anomalously high given today's 18Z KLIX RAOB analysis of 2.25" presenting a very evident moist- adiabatic thermal profile in place. Heavy rain and thunderstorms remains in place across coastal SE LA and adjacent marine areas. This mass of convection is confluent along a SE/NW oriented boundary/zone of surface moist convergence which has not been moving much. For tonight, this band may wobble some - particularly drift east along with Beta. The main focus for tomorrow is for where or if any additional mesoscale bands set up leading to training convection. Where exactly these bands set up is in doubt, as widespread 2 to 3 inches will be a general average within the current Flash Flood Watch but higher amounts upwards of 6 inches may be possible in some areas, especially south of I-10. WPC Day 2 ERO highlights the greatest focus for where these training bands will set up with a Moderate Risk across the Atchafalaya basin. Otherwise for the rest of tonight, gusty winds will persist. Most of the strongest winds remain along and just offshore coastal locations of southeastern Louisiana. However, breezy conditions remain in place along and south of I-10/12 where HRRR/NAM3KM guidance supports atleast advisory-level winds to persist. Because of this, have extended the Wind Advisory until midnight and to let later shifts cancel and/or extend if necessary. Additionally about Tuesday; expect similar cloudy/muggy conditions to persist with focus staying on if/where any heavy rain bands form along convergent moisture boundaries. Temperatures remain on the cooler side and have nudged just ever so slightly down against NBM guidance.

LONG TERM (Wednesday through Sunday) .

With Beta making landfall along coastal SE Texas, what is left of the circulation is forecast to take a turn and pull more to the northeast SE Texas/SW Louisiana. There remains a split in the guidance between CAM's and the global models where the CAM's keep the remnant low north of our area, while the GFS/ECMWF solution keeps the low tracking across southeastern LA. The difference in solutions will prove different scenarios across the area. If the remnant low tracks to our north, just enough low-level shear and deep moisture will provide the potential of a few rotating shallow cells leading to a few isolated tornadoes. This threat will be low along and north of where the low tracks so be advised as this may need to be monitored - especially if CAM's are right and keeps the low more towards the north. Regardless, expect ongoing bands of heavy rain/training cells to keep the flash flooding risk up through the day on Wednesday. Depending on the eventual speed of the low exiting the area will determine when we eventually clear up. Taking a blend of global guidance does slowly clear out conditions late week and into the weekend. However, this could be short lived as the next shortwave trough digs south across Texas (as indicated by trends in the GFS). This will again place the northern Gulf coast along the downstream divergent eastern section bringing back yet another risk of increased rain chances upcoming this weekend.

The good news is by early next week, this possible shortwave becomes absorbed by a stronger longwave trough digging deep across the east coast and pushes out, and will be followed by a strong, progressive NW to SE flow aloft. This will support strong upper- level divergence/ surface high pressure (1026mb+) and may actually deliver a cooler/drier shot of air following a strong cold front. Fingers crossed. KLG

MARINE .

Many impacts remain in place across all marine zones - including the continued threat for strong winds. Latest platform observations have indicated winds to be just narrowly at or slightly below sustained tropical storm force which has allowed for a cancellation of the Tropical Storm Warning. Now, all zones are under a Small Craft Advisory mentioning strong winds 25-30 knots continuing, with gusts to Tropical storm force remaining possible especially overnight. Easterly strong winds will continue through Tuesday and even into Wednesday where Small Craft Advisory conditions will prevail. Additional threats will include high/rough seas with wave heights ranging 10-12 feet for 20-60nm zones, 3-5 near coastal to 4-6 feet outer to 20nm. Protected waters will remain less, but range generally 2-4 feet before conditions steadily improve late Wednesday and especially on Thursday. Long fetch winds will keep waves and seas up to atleast 5-7 feet for outer waters on Thursday, but steadily lower and improve through late week.

Other concerns continue to be coastal flooding problems with Coastal Flood Warnings in effect. Advisories follow thereafter as impacts do improve beginning later Tuesday after high tide cycle. Minor, nuisance coastal flooding will continue atleast through Thursday but an overall improvement in conditions should begin starting Tuesday. KLG

PRELIMINARY POINT TEMPS/POPS. MCB 65 75 68 79 / 50 70 60 70 BTR 67 77 71 83 / 60 90 60 80 ASD 66 77 69 82 / 50 80 60 80 MSY 72 79 74 83 / 60 80 60 70 GPT 67 76 70 80 / 30 60 50 70 PQL 66 78 68 82 / 20 50 40 60

LIX WATCHES/WARNINGS/ADVISORIES. LA . Flash Flood Watch through Wednesday evening for LAZ034>037- 046>050-056>072.

Coastal Flood Advisory until 7 AM CDT Thursday for LAZ049-066.

Wind Advisory until 7 PM CDT this evening for LAZ056>070.

Coastal Flood Warning until noon CDT Tuesday for LAZ040-050-058- 060>062-064-067>070-072.

Coastal Flood Advisory from noon Tuesday to 7 AM CDT Thursday for LAZ040-050-058-060>062-064-067>070-072.

GM . Small Craft Advisory from 7 AM Tuesday to 7 AM CDT Wednesday for GMZ550-552-570-572-575.

Tropical Storm Warning for GMZ550-552-570-572-575.

Small Craft Advisory until 7 AM CDT Wednesday for GMZ530-532-534- 536-538-555-557-577.

MS . Coastal Flood Advisory until 7 AM CDT Thursday for MSZ081-082.

Coastal Flood Warning until noon CDT Tuesday for MSZ080.

Coastal Flood Advisory from noon Tuesday to 7 AM CDT Thursday for MSZ080.

GM . Small Craft Advisory from 7 AM Tuesday to 7 AM CDT Wednesday for GMZ552-570-572-575.

Tropical Storm Warning for GMZ552-570-572-575.

Small Craft Advisory until 7 AM CDT Wednesday for GMZ532-534-536- 538-555-557-577.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CARL1 9 mi52 min 82°F
NWCL1 - 8761927 - New Canal, LA 15 mi52 min E 12 G 18 71°F 76°F1017.9 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 19 mi52 min NE 1.9 G 7 71°F 74°F1018.7 hPa
SHBL1 - 8761305 - Shell Beach, LA 21 mi52 min ENE 19 G 25 73°F 76°F1018.3 hPa
FREL1 28 mi52 min ENE 14 G 17 71°F 1018.3 hPa
GISL1 - 8761724 - Grand Isle, LA 39 mi52 min 15 G 20 78°F
KXPY 49 mi25 min E 16 G 25 79°F 73°F

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans Naval Air Station - Alvin Callender Field, LA1 mi45 minENE 1210.00 miOvercast73°F71°F94%1017.9 hPa
New Orleans, New Orleans Lakefront Airport, LA15 mi47 minE 1510.00 miOvercast73°F66°F79%1018.1 hPa
New Orleans, New Orleans International Airport, LA15 mi47 minENE 810.00 miOvercast72°F66°F82%1019.1 hPa

Link to 5 minute data for KNBG

Wind History from NBG (wind in knots)
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2 days agoNE8NE9NE9NE8NE8NE9--NE11
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Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Tue -- 06:47 AM CDT     1.54 feet High Tide
Tue -- 06:48 AM CDT     Sunrise
Tue -- 12:31 PM CDT     Moonrise
Tue -- 06:55 PM CDT     Sunset
Tue -- 07:25 PM CDT     0.13 feet Low Tide
Tue -- 11:06 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.91.11.21.31.51.51.51.51.41.31.210.80.60.50.30.20.20.10.10.20.30.4

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
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Shell Beach
Click for Map
Tue -- 05:59 AM CDT     1.82 feet High Tide
Tue -- 06:47 AM CDT     Sunrise
Tue -- 12:30 PM CDT     Moonrise
Tue -- 06:27 PM CDT     0.15 feet Low Tide
Tue -- 06:54 PM CDT     Sunset
Tue -- 11:05 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.21.41.61.71.81.81.81.71.61.41.210.80.60.40.30.20.20.20.20.30.40.6

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.
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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.