Sunday, March29, 2020
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Marine Weather and Tides
Morgan City, LA

Version 3.4
NOTICE
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 6:53AMSunset 7:21PM Sunday March 29, 2020 1:27 PM CDT (18:27 UTC) Moonrise 9:11AMMoonset 11:14PM Illumination 31% Phase: Waxing Crescent; Moon at 6 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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GMZ455 Coastal Waters From Lower Atchafalaya River To Intracoastal City La Out 20 Nm- 933 Am Cdt Sun Mar 29 2020
Rest of today..Northeast winds 10 to 15 knots. Seas 1 to 3 feet.
Tonight..East winds 5 to 10 knots. Seas 1 foot or less.
Monday..Southeast winds 10 to 15 knots. Seas 1 to 3 feet. Slight chance of showers and Thunderstorms.
Monday night..South winds 10 to 15 knots. Seas 1 to 3 feet. Slight chance of showers in the evening. Slight chance of Thunderstorms through the night. Chance of showers after midnight.
Tuesday..West winds 15 to 20 knots. Seas 1 to 3 feet. Chance of showers and slight chance of Thunderstorms in the morning.
Tuesday night..North winds 15 to 20 knots. Seas 1 to 3 feet.
Wednesday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet.
Wednesday night..East winds 5 to 10 knots. Seas 1 foot or less.
Thursday..Southeast winds 5 to 10 knots. Seas 1 foot or less.
Thursday night..Southeast winds 5 to 10 knots. Seas 1 foot or less. Chance of showers.
GMZ400 Synopsis For Lower Atchafalaya River La To High Island Tx Out 60 Nm Including Sabine And Calcasieu Lakes And Vermilion Bay 933 Am Cdt Sun Mar 29 2020
Synopsis.. A brief period of elevated offshore flow is expected over the waters west of intracoastal city today behind a departing cold front. The front will begin to retreat back to the north tonight and Monday, with a light to modest onshore flow resuming. Another cold front will sweep through the coastal waters on Tuesday, ushering in another period of offshore flow into Wednesday. Southeast winds return Wednesday night and Thursday.


7 Day Forecast for Marine Location Near Morgan City, LA
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location: 29.67, -91.2     debug


Area Discussion for - Lake Charles, LA
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FXUS64 KLCH 291709 AFDLCH

Area Forecast Discussion National Weather Service Lake Charles LA 1209 PM CDT Sun Mar 29 2020

AVIATION. VFR will continue at all TAF sites. Any ceilings will remain above 4k ft. Winds will remain light northeast, transitioning to east Monday.

PREV DISCUSSION. /issued 952 AM CDT Sun Mar 29 2020/

UPDATE . Cold front has pushed through the forecast area leaving behind some lower dew points and less humidity. Still looks like the southwest flow aloft will bring in a decent amount of mid and high level clouds to filter out some of the sunshine this afternoon. With drier air in the low levels, do not expect any shower activity for the remainder of the day. Only made some minor adjustments to the grids at this time.

Rua

PREV DISCUSSION . /issued 607 AM CDT Sun Mar 29 2020/

AVIATION . A cold front continues to move away from the region with ceilings improving. VFR conditions are expected through the majority of the period. Winds will be north to northeast.

PREV DISCUSSION . /issued 519 AM CDT Sun Mar 29 2020/

DISCUSSION . CDFNT continues to push toward the SE early this morning, having just cleared Marsh Island and nearing Morgan City. Boundary is denoted on radar as a narrow band of light showers, with the earlier post frontal activity now dissipated. Temperatures on the cool side range from the mid 50s across interior SE TX and Central LA to the mid/upper 60s across South Central LA, with lower 70s still observed in the small warm sector near the lower Atchafalaya. These readings will come down a few more degrees as the front passes before the drop is halted by diurnal warming. Drier air is also filtering in as evidenced by SFC dewpoints in the mid 50s to lower 60s vs the near 70s 24 HRS ago. A clearing sky has also worked into the NW third or so of the area, which has allowed some patchy fog to form across the TX lakes region into Central LA. This fog should erode quickly post sunrise.

Progress of the front is expected to slow and eventually stall later this morning, with post frontal cloud cover likely to persist over a good part of the coastal waters and parts of South Central LA. This will keep afternoon temperatures here a little cooler, but areawide highs are still expected to top out at or above 80.

The stalled front will retreat back to the north tonight into MON as an upstream upper trof off the CA coast translates through the Desert SW and nears the Plains. Could see some spotty warm advection showers/isolated TSTMS late tonight into MON morning as MSTR lifts back into the region, but the bulk of convection will occur MON afternoon and night as the upper trof crosses the Southern Plains and an associated SFC low traverses N LA. SPC continues to outline a SLGT risk of SVR TSTMS across much of northern and parts of Central LA, with a MRGL risk down to the I-10 corridor. Damaging winds and/or hail will be the primary severe weather hazards.

With the resurgence in MSTR/return of WAA, temperatures tonight will be warmer than lows this morning, and back into the mid 60s/lower 70s MON night/TUE morning. Highs both MON and TUE will reach the upper 70s to lower 80s. Lagging CDFNT late TUE will usher in another bout of drier and slightly cooler air into the region, with near normal lows and highs expected WED. Reprieve won't last too long, however, as temperatures are expected to begin moderating WED night. Warming trend will continue through FRI, until another weak front pushes into the area on SAT. Global models also starting to come into better agreement regarding increasing rain chances toward the end the week and into the weekend, though there remain some differences to be resolved. Nudged PoPs up a bit with this forecast.

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MARINE . A cold front will continue pushing through the coastal waters this morning, with a brief period of elevated offshore flow expected over the waters west of Intracoastal City. The front will stall over the Gulf this afternoon, and begin to retreat back to the north tonight and Monday, with a light to modest onshore flow resuming. Another cold front will sweep through the coastal waters on Tuesday, ushering in another period of offshore flow into Wednesday. Southeast winds return Wednesday night and Thursday.

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PRELIMINARY POINT TEMPS/POPS. AEX 80 59 77 64 / 0 10 60 80 LCH 81 64 80 70 / 0 0 40 70 LFT 80 65 82 70 / 10 0 40 70 BPT 81 67 79 70 / 0 10 30 50

LCH WATCHES/WARNINGS/ADVISORIES. LA . None. TX . None. GM . None.

AVIATION . 23


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TESL1 - Tesoro Marine Terminal - 8764044 - Berwick, LA 2 mi58 min NE 9.9 G 13 76°F 65°F1020.2 hPa
AMRL1 - 8764227 - Amerada Pass, LA 17 mi58 min NE 5.1 G 8 80°F 67°F1020.1 hPa
EINL1 23 mi58 min E 11 G 11 74°F 65°F1019.8 hPa52°F
BYGL1 - 8762482 - Bayou Gauche, LA 42 mi58 min NE 1.9 G 8 80°F 78°F1020.5 hPa
MRSL1 - Marsh Island, LA / CSI03 48 mi148 min 16 G 19 74°F

Wind History for Tesoro Marine Terminal, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Patterson Memorial, LA8 mi32 minENE 1010.00 miMostly Cloudy79°F51°F38%1020.4 hPa
Salt Point, LA19 mi89 minNNE 7 mi78°F51°F39%1019.7 hPa

Link to 5 minute data for KPTN

Wind History from PTN (wind in knots)
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S11S9SW6S6S5S6S5SW5SW5SW5SW5N8N7NE6NE7NE6NE11NE13NE13NE10
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Tide / Current Tables for Shell Island, Louisiana
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Shell Island
Click for Map
Sun -- 12:46 AM CDT     0.14 feet Low Tide
Sun -- 06:57 AM CDT     Sunrise
Sun -- 10:11 AM CDT     Moonrise
Sun -- 10:53 AM CDT     1.34 feet High Tide
Sun -- 01:18 PM CDT     1.19 feet Low Tide
Sun -- 05:43 PM CDT     1.23 feet High Tide
Sun -- 07:22 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.10.20.30.40.60.811.11.21.31.31.31.21.21.21.21.21.21.21.110.80.5

Tide / Current Tables for Point Chevreuil, Louisiana
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Point Chevreuil
Click for Map
Sun -- 12:31 AM CDT     0.14 feet Low Tide
Sun -- 06:58 AM CDT     Sunrise
Sun -- 10:12 AM CDT     Moonrise
Sun -- 11:01 AM CDT     1.34 feet High Tide
Sun -- 01:03 PM CDT     1.19 feet Low Tide
Sun -- 05:51 PM CDT     1.23 feet High Tide
Sun -- 07:23 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.10.20.30.50.60.811.11.21.31.31.31.21.21.21.21.21.21.21.110.70.5

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
Wind Forecast for Lake Charles, LA (14,3,4,5)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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Gulf Stream Current


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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 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.