Friday, April3, 2020
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Marine Weather and Tides
Chalmette, 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 6:44AMSunset 7:21PM Friday April 3, 2020 6:09 PM CDT (23:09 UTC) Moonrise 2:34PMMoonset 3:48AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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- 342 Pm Cdt Fri Apr 3 2020
Tonight..Southeast winds 5 to 10 knots becoming northeast after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers in the afternoon.
Saturday night..South winds 5 to 10 knots becoming southwest late in the evening, then becoming northwest after midnight becoming northeast after midnight. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers.
Sunday..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of sprinkles through the day.
Sunday night..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Monday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of Thunderstorms early in the afternoon. Slight chance of showers in the afternoon.
Monday night..South winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday night..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Wednesday..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms in the afternoon.
Wednesday night..West winds 5 to 10 knots. Waves 1 foot or less.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 342 Pm Cdt Fri Apr 3 2020
Synopsis..High pressure will remain centered to the north and northeast of the water through middle of next week. Weak frontal boundary will try to nudge in Saturday night but will quickly lift north Sunday.


7 Day Forecast for Marine Location Near Chalmette, LA
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location: 30, -89.93     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 032108 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 408 PM CDT Fri Apr 3 2020

SYNOPSIS. Latest surface analysis revealed a 1017mb high over Indiana/Ohio with the ridge axis southwest across the Lower Mississippi Valley and a cold front Wisconsin to northeast Texas to Big Bend Texas. Light southeast winds were present over the Lower Mississippi Valley. Surface dewpoint ranged from the lower 50 from central Mississippi to the upper 50s to the Louisiana coast.

Upper air analysis showed a cyclonic circulation off the northeast coast and a large trough over interior Rockies. In addition, ridge axis was present from mid Mississippi Valley to Wisconsin. In addition, zonal flow was present over the Lower Mississippi Valley. Isotach analysis showed sub-tropical jet from Baja California to central Texas.

DISCUSSION. Upper level cyclonic will continue to rotate over the northern Rockies with the trough axis pushing east through Friday. Mid layer and upper layer moisture will spread east across the forecast area on Friday. Upper level flow will west to southwest across the southern tier with the sub-tropical jet becoming a little active over Texas Friday and over the forecast area over the weekend. A inverted trough is expected to develop over the northwest west and northwest gulf Saturday into Sunday. The associated convection over the gulf may impede inflow at times but rain chances will increase Saturday evening and Sunday.

Going into the Monday, marginal instability will be in play for isolated thunderstorm activity with a good chance of rain Monday and this convection threat will continue through next week with better chance of convection across the north. Near normal temperatures will continue through the weekend with a warm up above normals next week. 18

AVIATION. VFR conditions are expected 18z Saturday with lowering Saturday afternoon. However, no impacts for the next 24 hrs for TAFS. 18

MARINE. The cold front to the north will approach but not make it to the coast. A broad low pressure in the western and southwestern Gulf may lead to winds temporarily shifting out of the east and east- northeast late Saturday and early Sunday. Winds will generally remain below 12 kts however there could be a window Saturday night as the pressure gradient from the broad low in the western Gulf and high pressure to the northeast tightens allowing for a short time frame of winds around 15kts. Seas will also generally remain in the 2-3 ft range while seas to 4 feet will be possible overnight Saturday in the outer waters and then maybe again in the outer waters next week due to persistent southerly winds. 18

DECISION SUPPORT.

DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support for COVID-19 outdoor test sites. River Flood Warnings

PRELIMINARY POINT TEMPS/POPS. MCB 78 60 80 61 / 0 0 20 30 BTR 80 61 80 61 / 0 0 20 30 ASD 80 58 83 62 / 0 0 20 30 MSY 81 64 82 65 / 0 0 20 30 GPT 77 62 79 64 / 0 0 10 20 PQL 80 56 83 61 / 0 0 10 20

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . None. MS . None. GM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 10 mi52 min E 2.9 G 8.9 77°F 74°F1013.5 hPa
CARL1 12 mi52 min 60°F
SHBL1 - 8761305 - Shell Beach, LA 16 mi58 min E 5.1 G 7 72°F 75°F1014.7 hPa
FREL1 27 mi52 min ENE 9.9 G 12 74°F 1013.4 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 30 mi58 min SE 6 G 12 75°F 76°F1014.5 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 39 mi58 min S 7 G 8.9 74°F 73°F1014.9 hPa

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, LA13 mi75 minSE 910.00 miMostly Cloudy75°F59°F58%1014.2 hPa
New Orleans, New Orleans International Airport, LA17 mi77 minVar 410.00 miPartly Cloudy79°F55°F45%1014.4 hPa

Link to 5 minute data for KNEW

Wind History from NEW (wind in knots)
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Last 24hr------------------------------------SE9
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1 day ago------------------------------------W6W6W6W7SW6SW5
2 days ago------------------------------------------------

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Fri -- 03:47 AM CDT     Moonset
Fri -- 06:46 AM CDT     Sunrise
Fri -- 10:57 AM CDT     -0.26 feet Low Tide
Fri -- 02:34 PM CDT     Moonrise
Fri -- 07:20 PM CDT     Sunset
Fri -- 11:45 PM CDT     1.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.90.70.60.40.20.1-0.1-0.2-0.2-0.3-0.2-0.2-00.10.20.40.50.70.80.911.1

Tide / Current Tables for Shell Beach, Lake Borgne, Louisiana
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Shell Beach
Click for Map
Fri -- 03:46 AM CDT     Moonset
Fri -- 06:45 AM CDT     Sunrise
Fri -- 10:00 AM CDT     -0.30 feet Low Tide
Fri -- 02:33 PM CDT     Moonrise
Fri -- 07:18 PM CDT     Sunset
Fri -- 10:58 PM CDT     1.27 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.10.90.70.50.30.1-0.1-0.2-0.3-0.3-0.3-0.2-0.10.10.30.40.60.80.91.11.21.21.3

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
Wind Forecast for New Orleans/Baton Rouge, LA (19,4,5,8)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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weather_mapweather_map weather_map

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.