Friday, January17, 2020
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Marine Weather and Tides
Zachary, 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 7:00AMSunset 5:28PM Friday January 17, 2020 12:16 PM CST (18:16 UTC) Moonrise 12:02AMMoonset 11:59AM Illumination 50% Phase: Third Quarter Moon; Moon at 22 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- 905 Am Cst Fri Jan 17 2020
Rest of today..East winds 10 to 15 knots. Waves 1 to 3 feet. Dominant period 4 seconds.
Tonight..Southeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers.
Saturday..South winds 5 to 10 knots becoming west in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Showers in the morning. Isolated Thunderstorms through the day. Showers likely in the afternoon. Visibility 1 mile or less in the morning.
Saturday night..North winds 10 to 15 knots. Waves 1 foot or less. Dominant period 4 seconds. Waves or seas building to 1 to 3 feet. Dominant period 4 seconds after midnight. Chance of showers.
Sunday..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Sunday night..North winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Monday..North winds 10 to 15 knots. Waves 2 to 4 feet.
Monday night..North winds 10 to 15 knots. Waves 2 to 4 feet.
Tuesday..Northeast winds 10 to 15 knots. Waves 1 to 2 feet.
Tuesday night..Northeast 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- 905 Am Cst Fri Jan 17 2020
Synopsis..A weak front will dissipate over the coastal waters on Friday. A much stronger front is then expected to push through the waters on Saturday.


7 Day Forecast for Marine Location Near Zachary, LA
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location: 30.66, -91.16     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 171712 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1112 AM CST Fri Jan 17 2020

UPDATE. Updated for the 18Z aviation discussion.

AVIATION. VFR conditions prevail at all area airports. Some vicinity showers are possible overnight tonight into tomorrow which may cause lower visibilities and ceilings. Some higher wind gusts are possible with these vicinity showers as well. MSW

PREV DISCUSSION. /issued 544 AM CST Fri Jan 17 2020/

DISCUSSION .

A weak cold front has pushed into the northern Gulf bringing cooler and drier air to region. The front has stalled and will retreat northward as warm front over the next 24 hours. This will result in an increased chance of showers tonight along with a brief return flow late today through midday Saturday. A strong 997 mb surface low over the Great lakes will move eastward toward the New England area through the weekend dragging a much stronger cold front through the region Saturday afternoon and beyond. Given the brief and weak return flow most of the rainfall associated with the front will be relatively light with mainly showers and primarily elevated thunderstorms if they do occur. A 1046 mb surface high over the eastern Dakotas and a longwave eastern conus upper trough will result in dry and below normal temperatures for the first half of next week. Multiple well below freezing nights will likely occur in interior areas including areas along and north of the I-12/I-10 corridor early next week. Due to multiple weeks of well above normal temperatures, vegetation has greened up, thus a freeze warning will be visited over the weekend packages for Monday and Tuesday morning lows. This will likely be for areas along and north of a line from Donaldsonville to Pascagoula. Surface high will move eastward by Thursday resulting in a return flow and much warmer temperatures. A potentially significant system late next week could bring heavy rain with strong to severe storms as a strong upper trough digs through the Plains.

MARINE . East to northeasterly flow will prevail early today with winds gradually returning to a east southeasterly flow. This will be short lived as a much stronger front approaches on Saturday. Strong northerly winds will be the dominant feature Sunday and Monday behind the front thus a Small Craft Advisory will be likely for the coastal waters and even possibly the lakes for the latter half of the weekend.

AVIATION .

Most locations currently VFR, with clouds between FL040-050, but there are occasional ceilings that will briefly pop in around FL025- 030. Drier air at the surface associated with the strong Great Lakes low level high pressure will erode these lower clouds this morning. However . mid and high clouds never really go away with plenty of moisture coming overtop of the Great Plains upper ridge.

As the surface high moves toward New England today, winds will come around to an ESE component, allowing low level moisture to return fairly quickly late this afternoon. Expect ceilings to return to the MVFR and IFR ranges, primarily after 18/00z. Surface dew points should remain too low to pose a significant threat of advection fog until near or after 18/12z. Even then, there'd be only a brief window for fog before the cold front arrives Saturday afternoon/evening. 35

DECISION SUPPORT . DSS code: Blue. Deployed: None. Activation: None. Activities: Forecast support for Stennis Space Center. River Flood Warnings for Pearl and Mississippi River Gages. 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 66 59 72 43 / 10 50 70 20 BTR 68 62 74 45 / 10 50 70 20 ASD 68 60 74 45 / 10 40 70 30 MSY 68 64 75 50 / 10 40 70 30 GPT 65 60 70 46 / 10 30 80 30 PQL 68 58 73 46 / 10 30 80 40

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 71 mi52 min ENE 12 G 18 63°F 64°F1026.8 hPa

Wind History for East Bank 1, Norco, B. LaBranche, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baton Rouge, Baton Rouge Metropolitan, Ryan Field, LA8 mi23 minE 510.00 miOvercast63°F46°F56%1026.7 hPa
New Roads False River Regional Airport, LA17 mi40 minESE 710.00 miOvercast61°F46°F59%1027.4 hPa

Link to 5 minute data for KBTR

Wind History from BTR (wind in knots)
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Last 24hrNE9N4N5N5N12NE11
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1 day agoSW10SW7S10S9S5SE5CalmCalmCalmCalmCalmCalmE4CalmNE3N3CalmCalmCalmCalmCalmNE5NE4Calm
2 days ago--S10S9S10S10CalmS6S3SE6SE4SE5SE5SE3SE6SE5SE6S8S5S7S8S5S8S9SW8

Tide / Current Tables for Weeks Bay, Vermilion Bay, Louisiana
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Weeks Bay
Click for Map
Fri -- 12:04 AM CST     Moonrise
Fri -- 06:37 AM CST     -0.02 feet Low Tide
Fri -- 07:00 AM CST     Last Quarter
Fri -- 07:03 AM CST     Sunrise
Fri -- 12:02 PM CST     Moonset
Fri -- 12:16 PM CST     0.64 feet High Tide
Fri -- 05:31 PM CST     Sunset
Fri -- 05:45 PM CST     0.36 feet Low Tide
Fri -- 11:21 PM CST     0.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.40.20.1-0-00.10.20.40.60.60.60.60.50.40.40.40.40.50.60.80.9

Tide / Current Tables for Cote Blanche Island, West Cote Blanche Bay, Louisiana
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Cote Blanche Island
Click for Map
Fri -- 12:04 AM CST     Moonrise
Fri -- 06:21 AM CST     -0.02 feet Low Tide
Fri -- 07:00 AM CST     Last Quarter
Fri -- 07:02 AM CST     Sunrise
Fri -- 12:01 PM CST     Moonset
Fri -- 12:51 PM CST     0.60 feet High Tide
Fri -- 05:29 PM CST     0.33 feet Low Tide
Fri -- 05:31 PM CST     Sunset
Fri -- 11:56 PM CST     0.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.60.40.20-0-00.10.20.30.50.60.60.60.50.40.30.30.40.50.60.70.8

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 (13,3,4,5)
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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.