Thursday, February20, 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 6:33AMSunset 5:53PM Thursday February 20, 2020 9:30 AM CST (15:30 UTC) Moonrise 5:47AMMoonset 4:18PM Illumination 10% Phase: Waning Crescent; Moon at 27 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- 409 Am Cst Thu Feb 20 2020
.small craft advisory in effect this afternoon...
.gale warning in effect from this evening through late tonight...
Today..Southeast winds 5 to 10 knots becoming north late in the morning, then rising to 15 to 20 knots in the afternoon. Waves less than 1 foot. Dominant period 4 seconds. Waves or seas building to 2 to 4 feet. Dominant period 4 seconds in the afternoon. Chance of showers early in the morning, then showers in the late morning and afternoon.
Tonight..North winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Friday..North winds 15 to 20 knots. Waves 3 to 5 feet. Dominant period 4 seconds.
Friday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Saturday..East winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Saturday night..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Sunday..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Sunday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers.
Monday..Southwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers.
Monday night..West winds 5 to 10 knots becoming northwest after midnight. Waves less than 1 foot. Dominant period 4 seconds. Chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 409 Am Cst Thu Feb 20 2020
Synopsis.. Winds will increase this afternoon and gale force winds are probable later this evening and into the morning hours on Friday. High pressure will settle behind the front relaxing winds by Friday evening. High pressure will remain in place through the weekend.


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 201014 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 414 AM CST Thu Feb 20 2020

SHORT TERM.

Showers have started to develop and move across the area this morning from west to east as a disturbance tracks across the area in the wake of a front that has moved into the coastal waters. Rain chances today are obviously extremely high with a shield of rainfall almost stretching across the area already at this point. Rainfall amounts today should be generally around one inch across the area, with generally lighter amounts near the coast and higher amounts to the north.

A late winter Arctic airmass will settle in behind the front bringing well below normal temperatures and very windy conditions beginning this afternoon through Friday morning. Temperatures will be several degrees below normal today with rain coverage and even more so tonight and tomorrow.

LONG TERM.

High pressure will build in Friday and remain in place through the upcoming weekend with dry and cool conditions remaining through the first half of the weekend. Near or just below freezing temperatures are possible for the northern areas of the forecast zones on Saturday morning. A warming trend will begin on Sunday out ahead of an upper level trough digging through the Plains on Sunday. Rain chances will increase by Sunday night and Monday as a result with a few strong storms possible in the northern most zones during this period. Front could stall or slowly move through Monday night and Tuesday morning bringing unsettled weather through Tuesday depending on which model is used. Hedged those bets at this time and went with generally with chance POPS. Will have to continue to monitor trends for outdoor activities on Tuesday.

AVIATION.

Ceilings have lowered this morning and some fog is intermingled between the rain showers, either of which are lowering visibilities. Rain will continue to move into the area and continue throughout the day. Winds will also be on the increase and could gust in excess of 20-25 knots at many of the terminals by this evening.

MARINE.

A short period of small craft advisory conditions this afternoon will give way to gale warnings across the coastal waters by this evening. Winds will increase to upwards of 25 knots with frequent gusts of 35 to 40 knots possible across the coastal waters. Some of the winds could be slightly lower in the near shore waters and across the tidal lakes but for consistency and with the consideration that conditions will be very close if not into gale force even across those areas, simply went with the gale warning across all the coastal waters until 12Z Friday morning. Winds should begin to wane in the near shore waters and the tidal lakes by then but the remainder of the inner and outer coastal waters will remain under the gale warning until 18Z. The next cold front will begin to cause a rise in SE winds by Monday with the front possibly moving through late Monday but there are differences as we get farther out in time.

DECISION SUPPORT.

DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support for Stennis Space Center River Flood Warnings Gale Warnings over Coastal Waters

Decision Support Services (DSS) Code Legend Green = No weather impacts that require action. Blue = Long-fused watch, warning, or advisory in effect or high visibility event; Marginal risk severe or excessive rain. Yellow = Heightened impacts with short-fused watch, warning or advisory issuances; radar support for slight risk severe or excessive rain. Orange = High Impacts; Enhanced risk severe; nearby tropical events; HazMat or other large episodes. Red = Full engagement for Moderate to high risk of severe and/or excessive rainfall, or direct tropical threats; Events of National Significance.

PRELIMINARY POINT TEMPS/POPS. MCB 55 34 51 32 / 100 10 0 0 BTR 56 35 52 32 / 100 10 0 0 ASD 59 35 53 33 / 100 20 0 0 MSY 61 41 53 40 / 100 20 0 0 GPT 59 37 52 36 / 100 20 0 0 PQL 59 36 54 34 / 100 20 0 0

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . Small Craft Advisory from 3 PM this afternoon to 6 PM CST this evening for GMZ530-532-534-536-538-550-552-555-557-570-572- 575-577.

Gale Warning from 6 PM this evening to 10 AM CST Friday for GMZ536-538-550-552-555-557-570-572-575-577.

Gale Warning from 6 PM this evening to 6 AM CST Friday for GMZ530-532-534.

MS . None. GM . Small Craft Advisory from 3 PM this afternoon to 6 PM CST this evening for GMZ532-534-536-538-550-552-555-557-570-572-575- 577.

Gale Warning from 6 PM this evening to 10 AM CST Friday for GMZ538-550-552-555-557-570-572-575-577.

Gale Warning from 6 PM this evening to 6 AM CST Friday for GMZ532-534.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 10 mi49 min SE 5.1 G 9.9 64°F 63°F1017.2 hPa
CARL1 12 mi43 min 49°F
SHBL1 - 8761305 - Shell Beach, LA 16 mi49 min SE 7 G 8.9 65°F 66°F1018.5 hPa
FREL1 27 mi43 min NNW 6 G 11 58°F 1018.3 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 30 mi49 min SE 7 G 8.9 67°F 66°F1018 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 39 mi43 min E 5.1 G 5.1 61°F 62°F1019 hPa

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New Orleans, New Orleans Lakefront Airport, LA6 mi38 minSE 83.00 miLight Rain Fog/Mist65°F62°F90%1017.7 hPa
New Orleans Naval Air Station - Alvin Callender Field, LA13 mi96 minSE 82.00 miRain Fog/Mist65°F64°F100%1018 hPa
New Orleans, New Orleans International Airport, LA17 mi38 minN 160.50 miHeavy Rain Fog/Mist63°F60°F90%1018.8 hPa

Link to 5 minute data for KNEW

Wind History from NEW (wind in knots)
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Last 24hrNE8NE7NW9E6N7NE6N7NE7NE12NE12NE13NE13NE11NE7E9E7E8E9E11SE11E10E8SE10SE8
1 day agoS8S10S10S10SW11S11S9S7SW7SW5SW5S5CalmS3S5S3N6N4CalmN12NE6NE6NE4E4
2 days agoE8E6SE8SE8E7E7SE9SE7SE11SE8SE7SE7SE6SE7SE7SE8SE7SE8SE8SE8SE6SE3SE7S7

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Thu -- 12:10 AM CST     1.06 feet High Tide
Thu -- 04:47 AM CST     Moonrise
Thu -- 06:35 AM CST     Sunrise
Thu -- 12:31 PM CST     -0.44 feet Low Tide
Thu -- 03:18 PM CST     Moonset
Thu -- 05:51 PM CST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.1110.90.70.50.30.1-0-0.2-0.3-0.4-0.4-0.4-0.4-0.3-0.2-0.10.10.20.40.60.80.9

Tide / Current Tables for Chef Menteur, Chef Menteur Pass, Louisiana
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of Southeast    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 (10,2,3,4)
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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.