Sunday, July12, 2020
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Marine Weather and Tides
Killian, 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 6:07AMSunset 8:07PM Sunday July 12, 2020 5:45 PM CDT (22:45 UTC) Moonrise 12:00AMMoonset 11:58AM 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- 356 Pm Cdt Sun Jul 12 2020
Tonight..West winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of Thunderstorms early in the evening. Slight chance of showers until early morning.
Monday..Southwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms through the day.
Monday night..West winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of Thunderstorms early in the evening. Slight chance of showers in the evening.
Tuesday..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers through the day. Slight chance of Thunderstorms in the late morning and afternoon.
Tuesday night..Southwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Wednesday..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers through the day. Chance of Thunderstorms in the late morning and afternoon.
Wednesday night..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Thursday..West winds near 5 knots becoming south in the afternoon. Waves less than 1 foot. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Thursday night..Southwest winds 5 to 10 knots becoming west after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Friday..North winds near 5 knots becoming southeast in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms through the day.
Friday night..South winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 356 Pm Cdt Sun Jul 12 2020
Synopsis..High pressure will remain settled over the central gulf waters through the week. There is a chance of strong Thunderstorms capable of producing high wind gusts and frequent lightning later this evening and overnight in the coastal waters mainly from port fourchon eastward.


7 Day Forecast for Marine Location Near Killian, LA
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location: 30.3, -90.42     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 122126 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 426 PM CDT Sun Jul 12 2020

DISCUSSION.

The absence of showers and substantial cloud cover at most locations has once again allowed the temperatures and heat indices to soar today with most locations seeing temperatures in the mid 90s with heat index readings of 108 to 115. Will keep today's Excessive Heat Warning and Heat Advisory in place through 8 pm. Will also watch for development of isolated to scattered showers and thunderstorms in portions of the area or moving in from the north. Much of the area remains in a Day One Marginal Risk in the Convective Outlook. Will continue to monitor.

Looking ahead to tomorrow, the weather pattern and setup for heat really doesn't change with high pressure both at the surface and aloft dominating. The main difficulty is forecasting the areas that keep upper 70s to near 80 dewpoint temperatures in the afternoon while also experiencing the mid 90s temperatures. While that cannot be ruled out again tomorrow, the majority of the forecast points are forecast to remain in Heat Advisory criteria, so a new Heat Advisory has been issued for tomorrow, again from 10 am to 8 pm which should encompass most of the 105+ heat index readings. While shower and thunderstorm coverage has come up a bit short/delayed from what was expected again today, that could change tomorrow as a series of shortwave troughs continue to move around the ridge to the south and southeast. Depending on how much and the size of any MCS, there should be some additional surface boundaries to work with along with very unstable low level lapse rates. Most of the area is in a Marginal Risk of severe thunderstorms on Monday and Monday night.

The expansive mid/upper ridge anchored across the southwest to south central U.S./northern Mexico area early in the week will start to extend east to east-northeast across the lower Mississippi valley to the interior southeast U.S. during the mid to latter part of the week. The chances of showers and thunderstorms will start to ramp up each day as the central Gulf coast starts to become under more influence from moist easterlies. Until the rain chances increase, high heat indices will remain a concern and additional heat advisories will likely be necessary through mid week.

AVIATION.

VFR conditions expected to prevail, except under any heavier SHRA/TSRA where much lower conditions could briefly occur. Because of lower confidence in where higher coverage/probabilities will be to support more than VCTS, that is all that was included at this time through early this evening, and later TAF issuances may have to consider inclusion for Monday afternoon.

MARINE.

Light to moderate westerly winds are expected to prevail through Tuesday night between high pressure to the south and lower pressures to the north. Most speeds should peak in 10 to 15 knots range with seas mostly in 1 to 3 foot range. A lighter wind regime should mostly dominate Wednesday though late in the week with relatively flat seas. Some stronger thunderstorms could develop or move in from the north this evening and possibly Monday into Tuesday, but coverage should be isolated to locally scattered.

PRELIMINARY POINT TEMPS/POPS. MCB 77 94 77 93 / 30 40 10 30 BTR 78 96 78 96 / 10 30 20 20 ASD 77 96 77 94 / 20 40 20 30 MSY 79 95 79 93 / 20 30 20 20 GPT 78 92 79 91 / 40 40 20 30 PQL 76 94 76 94 / 50 50 20 40

LIX WATCHES/WARNINGS/ADVISORIES. LA . Heat Advisory until 8 PM CDT this evening for LAZ066>070.

Heat Advisory from 10 AM to 8 PM CDT Monday for LAZ034>037-039- 040-046>050-056>072.

Excessive Heat Warning until 8 PM CDT this evening for LAZ034>037-039-040-046>050-056>065-071-072.

GM . None. MS . Heat Advisory until 8 PM CDT this evening for MSZ081-082.

Heat Advisory from 10 AM to 8 PM CDT Monday for MSZ068>071-077- 080>082.

Excessive Heat Warning until 8 PM CDT this evening for MSZ068>071-077-080.

GM . None.

TD


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FREL1 13 mi45 min W 4.1 G 9.9 95°F 1009.4 hPa (-1.7)
NWCL1 - 8761927 - New Canal, LA 25 mi45 min W 5.1 G 8.9 95°F 91°F1009.7 hPa (-1.7)
CARL1 30 mi45 min 86°F
BYGL1 - 8762482 - Bayou Gauche, LA 35 mi45 min WSW 5.1 G 9.9 92°F 92°F1011 hPa (-1.5)

Wind History for East Bank 1, Norco, B. LaBranche, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hammond, Hammond Municipal Airport, LA15 mi50 minW 710.00 miMostly Cloudy95°F75°F53%1010.5 hPa
New Orleans, New Orleans International Airport, LA24 mi52 minW 810.00 miMostly Cloudy97°F75°F51%1010.8 hPa

Link to 5 minute data for KHDC

Wind History from HDC (wind in knots)
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Last 24hrN6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW4NW3W5NW6NW5W9
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1 day agoNW7W5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4N3NW3NW6NW5N6NW7N7N5NW9NW9N8
2 days agoW5NW3CalmSW3W6W6SW6W3CalmW3CalmCalmCalmW3W5W6W7NW8W10W7NW6W5W9W8

Tide / Current Tables for Paris Road Bridge, Mississippi River Delta, Louisiana
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Paris Road Bridge
Click for Map
Sun -- 12:30 AM CDT     Moonrise
Sun -- 05:30 AM CDT     0.44 feet Low Tide
Sun -- 06:07 AM CDT     Sunrise
Sun -- 12:56 PM CDT     Moonset
Sun -- 01:23 PM CDT     0.70 feet High Tide
Sun -- 06:31 PM CDT     Last Quarter
Sun -- 08:03 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Long Point, Lake Borgne, Louisiana
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Long Point
Click for Map
Sun -- 12:28 AM CDT     Moonrise
Sun -- 02:03 AM CDT     0.40 feet Low Tide
Sun -- 06:05 AM CDT     Sunrise
Sun -- 10:43 AM CDT     0.63 feet High Tide
Sun -- 12:54 PM CDT     Moonset
Sun -- 06:31 PM CDT     Last Quarter
Sun -- 08:02 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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 (18,4,5,8)
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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.