Wednesday, October28, 2020
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Marine Weather and Tides
Iowa, LA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:23AMSunset 6:29PM Wednesday October 28, 2020 1:45 AM CDT (06:45 UTC) Moonrise 4:18PMMoonset 3:42AM Illumination 87% 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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GMZ432 Calcasieu Lake- 1042 Pm Cdt Tue Oct 27 2020
Rest of tonight..Northeast winds 5 to 10 knots. Lake waters a light chop. Chance of showers late in the evening. Slight chance of Thunderstorms through the night. Showers likely after midnight.
Wednesday..Northeast winds 5 to 10 knots. Lake waters a light chop. Showers likely and slight chance of Thunderstorms.
Wednesday night..Northwest winds 10 to 15 knots. Lake waters choppy. Slight chance of rain showers in the evening.
Thursday..West winds 10 to 15 knots. Lake waters choppy.
Thursday night..North winds 10 to 15 knots. Lake waters choppy.
Friday..North winds around 10 knots. Lake waters a light chop.
Friday night..Northeast winds 5 to 10 knots. Lake waters a light chop.
Saturday..Northeast winds 5 to 10 knots. Lake waters a light chop.
Saturday night..Northeast winds 5 to 10 knots. Lake waters a light chop.
Sunday..North winds 10 to 15 knots. Lake waters choppy.
GMZ400 Synopsis For Lower Atchafalaya River La To High Island Tx Out 60 Nm Including Sabine And Calcasieu Lakes And Vermilion Bay 1042 Pm Cdt Tue Oct 27 2020
Synopsis.. Easterly winds will continue tonight, strengthening into Wednesday as zeta moves northward across the gulf of mexico. Tropical storm force winds may enter the coastal waters, mainly east of intracoastal city, by Wednesday morning and continue into Wednesday evening. Increased offshore flow will develop by late in the week as a cold front interacts with northerly winds in the wake of zeta. Mariners should continue to Monitor the latest forecasts for zeta.


7 Day Forecast for Marine Location Near Iowa, LA
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location: 30.23, -93     debug


Area Discussion for - Lake Charles, LA
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FXUS64 KLCH 280406 AFDLCH

Area Forecast Discussion National Weather Service Lake Charles LA 1106 PM CDT Tue Oct 27 2020

UPDATE. Minor tweaks to PoPs as well as hourly temps and dewpoints to reflect observation and radar trends this evening. Latest sfc analysis shows a wavy quasi-stationary frontal boundary acrs cntl LA and arcing southwest acrs lower SE TX. The boundary separates warm and moist air acrs S LA where temperatures are in the lower to middle 70s, from cooler temperatures in the middle 60s immediately north and west of the front. However, much colder temperatures are not far behind, with temperatures west of Houston in the middle 40s.

Meanwhile, Tropical Storm Zeta continues to become better organized over the Gulf of Mexico and is expected to strengthen back to hurricane force overnight. Zeta is expected to accelerate north-northeast on Wednesday, with a landfall acrs SE LA by late Wednesday aftn or early evening. The proximity of Zeta could produce at least some tropical storm force gusts acrs portions of the lower Atchafalaya Basin, along with some minor coastal flooding near times of high tide along the Iberia and Saint Mary coasts through Wednesday evening. With the track and timing remaining rather consistent, no changes were made to the tropical hazards this evening.

24

PREV DISCUSSION. /issued 620 PM CDT Tue Oct 27 2020/

DISCUSSION . 00Z TAFS.

AVIATION . MVFR ceilings will lower to IFR at or before daybreak at most sites. Intermittent SHRA this evening and overnight will become more widespread as the rainshield of Hurricane Zeta spreads over the region. The strongest winds expected to be east of the Atchafalaya River, sightly stronger winds 15-18 kts with gusts around 25 kts can be expected for ARA/LFT Wednesday afternoon and evening as the center of Zeta approaches SE Louisiana.

DML

PREV DISCUSSION . /issued 439 PM CDT Tue Oct 27 2020/

SYNOPSIS . Will be watching Zeta as it moves up toward the southeast Louisiana coast late Wednesday. As of now any potential impacts will be confined to the far southeastern portion of the forecast area. A rather vigorous upper level system will ejected out of the southwest US and help push a strong cold front across the forecast area late Wednesday and early Thursday. This will knock Zeta off to the northeast and bring a dry continental air mass in the forecast area. The air mass will give a definite feeling of Fall through the Halloween weekend into early next week and Election Day.

For Tropical Hazards . The Storm Surge Warning has been dropped between Intracoastal City and Morgan City. With the track being consistent, and that area on the western side, at best we are looking at 1-2 feet water level inundation with the easterly flow ahead of Zeta. Therefore, a Coastal Flood Advisory will be issued for Iberia and St. Mary Parish to account for that.

The Coastal Flood Advisory will run from the next high tide cycle which begins around midnight tonight, then keep it up until offshore wind flow begins by late Wednesday afternoon.

Tropical Storm Watch will remain the same for to account for some tropical storm force wind gusts Wednesday afternoon for Saint Mary and Lower Saint Martin Parish. Also, tropical storm force wind probability remain over 40 percent that same small region.

Rua

DISCUSSION . As expected, with an increase in moisture and daytime heating, shower activity has started across the forecast area. This shower activity should decrease during the evening hours, then nocturnal shower activity will increase again overnight.

Forecast with Tropical Storm Zeta has not changed much. Zeta has not strengthened much today as it moves northwest into the southern Gulf of Mexico, however should begin to strengthen back to a hurricane tonight. The strong upper level low over the southwest US is beginning to eject off to the northeast. Therefore, the guidance is still clustered with taking the center of Zeta to the southeast Louisiana coast on late Wednesday afternoon or evening.

The strong southwest shear ahead of the upper level low should also make Zeta more asymmetrical as it enters the northern Gulf of Mexico. With that, the most significant impacts will be east of the center, which means just the far southeastern zones, mainly the Lower Atchafalaya River Basin will see the potential for tropical storm force winds, mainly in gusts, and some heavy rainfall bands, although at this point areawide 1 to 2 inches in that area with isolated 3 seems reasonable.

A strong surface cold front will move across the forecast area Wednesday night into early Thursday. A dry continental air mass behind the front will make for much more pleasant weather conditions with much cooler temperatures through the Halloween weekend.

A reinforcing cold front on Sunday will keep the nice fall weather into early next week.

Rua

MARINE . Easterly winds will increase later tonight as Zeta moves through the southern and central Gulf of Mexico. Wave heights will increase enough that a majority marine zones outside of the tropical hazards will need small craft advisories by morning and winds with the front that all nearshore and offshore marine zones outside of tropical hazards will have a small craft advisory by Wednesday afternoon.

Zeta is then expected to move toward the south central to southeast Louisiana coast on Wednesday into Wednesday evening. Currently, deterministic wind forecast has tropical storm force winds reaching eastern sections of GMZ475, marine zone between Intracoastal City and the Lower Atchafalaya River beyond 20 nm on Wednesday morning, then spread into GMZ455 during the day, with tropical storm winds ending during late Wednesday afternoon. Some hurricane force wind gusts are also possible in the GMZ475 zone for a few hours around 28/18Z

A cold front will move in behind the departing tropical cyclone on Thursday with brisk northerly winds and small craft advisories conditions. These offshore winds will begin to decrease by Friday as high pressure settles into the region. However, offshore winds will increase again by late Sunday as a reinforcing cold front moves through the coastal waters.

Rua

PRELIMINARY POINT TEMPS/POPS. AEX 63 77 49 63 / 40 70 50 10 LCH 71 79 51 65 / 50 70 30 10 LFT 73 82 54 66 / 60 80 40 10 BPT 69 76 48 65 / 50 70 20 0

LCH WATCHES/WARNINGS/ADVISORIES. LA . Tropical Storm Watch for LAZ052>055.

Coastal Flood Advisory until 7 PM CDT Wednesday for LAZ053-054.

TX . None. GM . Hurricane Warning for GMZ475.

Small Craft Advisory from 7 AM Wednesday to 7 AM CDT Thursday for GMZ452-470-472.

Tropical Storm Warning for GMZ455.

Tropical Storm Watch for GMZ435.

Small Craft Advisory from 1 PM Wednesday to 7 AM CDT Thursday for GMZ450.



PUBLIC . 24


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCLL1 - 8767816 - Lake Charles, LA 12 mi46 min 69°F 73°F1011.7 hPa (-0.9)
BKTL1 16 mi46 min 76°F
CAPL1 - 8768094 - Calcasieu Pass, LA 37 mi46 min NE 7 G 9.9 73°F 74°F1009.1 hPa (-1.2)
PORT2 - 8770475 - Port Arthur, TX 55 mi46 min NNE 5.1 G 8.9 71°F 75°F1010.8 hPa (-1.2)

Wind History for Calcasieu Pass, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chenault Airpark, LA8 mi71 minNE 97.00 miLight Rain70°F67°F94%1012.2 hPa
Lake Charles Regional Airport, LA14 mi53 minNE 11 G 207.00 miOvercast70°F69°F97%1012.5 hPa
Southland Field, LA21 mi51 minNE 87.00 miOvercast72°F68°F89%1011.8 hPa

Link to 5 minute data for KCWF

Wind History from CWF (wind in knots)
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Last 24hrNE4NE5NE5NE6NE5NE5NE5NE7E7E9NE7E8NE7NE4E4CalmCalmNE5NE6NE10NE7NE9NE8NE6
1 day agoE7E5E5E4CalmNE4NE5NE6E7SE7SE6SE7CalmCalmCalmE6CalmE5E5NE4E4E6E4E3
2 days agoNE4NE4NE6NE5NE3NE6NE4N4N4CalmE4NE4NE5E5E7E7E6CalmE5E6E6E4NE7E8

Tide / Current Tables for Mermentau River entrance, Louisiana
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Mermentau River entrance
Click for Map
Wed -- 01:23 AM CDT     2.72 feet High Tide
Wed -- 04:42 AM CDT     Moonset
Wed -- 07:23 AM CDT     Sunrise
Wed -- 08:32 AM CDT     1.58 feet Low Tide
Wed -- 01:28 PM CDT     2.70 feet High Tide
Wed -- 05:18 PM CDT     Moonrise
Wed -- 06:28 PM CDT     Sunset
Wed -- 08:36 PM CDT     1.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.72.72.62.32.11.91.71.61.61.82.12.42.72.72.62.32.11.91.71.61.61.72

Tide / Current Tables for Calcasieu Pass, Lighthouse wharf, Louisiana
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Calcasieu Pass
Click for Map
Wed -- 01:52 AM CDT     1.83 feet High Tide
Wed -- 04:43 AM CDT     Moonset
Wed -- 07:24 AM CDT     Sunrise
Wed -- 08:09 AM CDT     0.45 feet Low Tide
Wed -- 02:12 PM CDT     1.68 feet High Tide
Wed -- 05:19 PM CDT     Moonrise
Wed -- 06:29 PM CDT     Sunset
Wed -- 08:10 PM CDT     0.52 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.81.81.71.51.10.80.60.50.50.711.31.61.71.61.41.20.90.60.50.60.81.1

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
Ground Weather Radar Station Lake Charles, LA
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Gulf Stream Current



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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.