Monday, September28, 2020
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L-36.com

Marine Weather and Tides
Madisonville, 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 6:52AMSunset 6:51PM Monday September 28, 2020 10:45 PM CDT (03:45 UTC) Moonrise 4:32PMMoonset 2:50AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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- 942 Pm Cdt Mon Sep 28 2020
.small craft advisory in effect through Tuesday evening...
Rest of tonight..North winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Tuesday..North winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Tuesday night..Northwest winds 15 to 20 knots easing to 5 to 10 knots after midnight. Waves 2 to 4 feet. Dominant period 4 seconds.
Wednesday..Northwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday night..Northwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Thursday..Northwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Thursday night..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Friday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Saturday..Northeast winds 10 to 15 knots. Waves 2 to 4 feet.
Saturday night..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 942 Pm Cdt Mon Sep 28 2020
Synopsis..High pressure will settle over the waters tonight and remain in place through Thursday. A reinforcing cold front is expected to move through the coastal waters early Friday.


7 Day Forecast for Marine Location Near Madisonville, LA
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location: 30.38, -90.16     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 282057 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 357 PM CDT Mon Sep 28 2020

SHORT TERM. Cold front currently moving through the forecast area, having already cleared Slidell and Kenner. Frontal zone demarked by about an 11 degree drop from the around 90F to the upper 70s in about 20-30 minutes, along with a smattering of showers and thunderstorms along the leading edge. Frontal convection has been encountering drier air aloft to limit coverage from becoming truly linear. Meanwhile, strongest convection appears to be associated with convergent lake breezes of Lakes Pontchartrain and Borgne that have bulked up and moved over Borgne and the adjacent Biloxi marsh area. Some reports of small hail have been noted earlier this afternoon with steep lapse rates and wet-bulb cooling taking place in the presence of deep dry column above the near surface moisture. This is all becoming flushed out by front, with the coastal MS counties still downstream of the passage to come generally between 4 and 5 pm. The upper thermal trough stucture still lags with a considerably large area of elevated convection between Lake Charles and Lafayette. This will impart some rain chances through at least sunset to the west, but should diminish in coverage thereafter as it appears to be cold pool driven on daytime heating. Temperatures are expected to fall to the lowest in quite some time. The forecast lows for tonight haven't been felt since May 11/12, when BTR reached 52F (11th), MSY reached 56F (11th) and ASD reached 56F (12th). Dry and cooler yet expected for Tuesday and Wednesday.

LONG TERM. Thurday picks up with a warming trend underway as some air mass modification takes place, while the upper level large amplitude trough remains essentially along and east of the Mississippi Valley. A re-enforcing Canadian cold front pushes through the area early Friday to bring the weekend back into milder temperatures and remaining dry all the while. It should be noted that an area of disturbed tropical weather lurking in the western Caribbean Sea may attempt to become better organized while traversing the Yucatan Peninsula, possibly entering the Bay of Campeche by early next week. This teleconnection would signal some sort of wave structure in the northern gulf to bring increased rain chances just beyond this forecast cycle for early to mid-next week.

AVIATION. With front moving eat of the terminals by 00Z, convective coverage will be decreasing across the area to impart mainly VFR conditions in the early hours of the valid TAF period. As cold air advection deepens in trail of the front, some lowering to MVFR and IFR cloud decks likely from west to east in the mid to late evening, possibly persisting into the mid-morning hours before becoming diabatically mixed out late morning Tuesday.

MARINE. Strong cold front to move through the coastal waters tonight to bring a rather steady increase in NW winds with frequent gusts considering the integrity of the cold air advection to move over the warmer shelf waters. Small Craft Advisory was already pre- emptively posted with the more impactful winds and building seas to occur overnight tonight through much of tomorrow before advection abates Tuesday late afternoon. Conditions should settle for mid-week then become re-enforced with another continental cold front surge off the coast Friday.

DECISION SUPPORT. DSS Code . Blue. Activities . Critical IDSS site support NASA SLS support

PRELIMINARY POINT TEMPS/POPS. MCB 58 73 53 76 / 10 0 0 0 BTR 57 75 53 78 / 0 0 0 0 ASD 59 75 53 77 / 10 10 0 0 MSY 64 74 59 76 / 10 0 0 0 GPT 60 74 56 75 / 20 10 0 0 PQL 60 75 53 78 / 40 10 0 0

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . Small Craft Advisory from 7 PM this evening to 4 PM CDT Tuesday for GMZ530-532-534-536-538-550-552-555-557-570-572-575-577.

MS . None. GM . Small Craft Advisory from 7 PM this evening to 4 PM CDT Tuesday for GMZ532-534-536-538-550-552-555-557-570-572-575-577.



24/RR


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FREL1 23 mi45 min N 13 G 19 68°F 1014.4 hPa (+2.5)
NWCL1 - 8761927 - New Canal, LA 25 mi45 min NNE 20 G 25 69°F 79°F1014.5 hPa (+2.6)
CARL1 31 mi45 min 79°F
BYGL1 - 8762482 - Bayou Gauche, LA 43 mi45 min N 1.9 G 4.1 68°F 82°F1015.5 hPa (+2.8)
SHBL1 - 8761305 - Shell Beach, LA 44 mi45 min N 19 G 22 69°F 82°F1014.6 hPa (+2.5)
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 44 mi45 min N 14 G 17 71°F 78°F1015.1 hPa (+3.0)

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hammond, Hammond Municipal Airport, LA17 mi50 minN 710.00 miMostly Cloudy63°F57°F83%1015.6 hPa
Slidell, Slidell Airport, LA18 mi52 minN 1110.00 miFair66°F60°F81%1014.7 hPa

Link to 5 minute data for KHDC

Wind History from HDC (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW6SW9W7
G14
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G20
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1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW4NW7CalmCalmW6S8SE4SE5CalmCalmSE5
2 days agoCalmCalmCalmCalmN3CalmCalmCalmCalmNE3E3E7E4E5E5SE3E4E3SE4SE4SE3CalmCalmCalm

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Mon -- 12:19 AM CDT     0.32 feet Low Tide
Mon -- 03:50 AM CDT     Moonset
Mon -- 06:51 AM CDT     Sunrise
Mon -- 01:19 PM CDT     1.34 feet High Tide
Mon -- 05:30 PM CDT     Moonrise
Mon -- 06:48 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.40.40.50.60.70.80.911.11.21.31.31.31.31.21.110.90.70.60.60.5

Tide / Current Tables for Long Point, Lake Borgne, Louisiana
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Long Point
Click for Map
Mon -- 03:48 AM CDT     Moonset
Mon -- 06:50 AM CDT     Sunrise
Mon -- 10:39 AM CDT     1.21 feet High Tide
Mon -- 05:29 PM CDT     Moonrise
Mon -- 06:46 PM CDT     Sunset
Mon -- 09:28 PM CDT     0.40 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.60.60.70.80.911.11.21.21.21.21.110.90.80.70.60.50.40.40.40.4

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.