Sunday, March29, 2020
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Marine Weather and Tides
Patterson, 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 6:53AMSunset 7:21PM Sunday March 29, 2020 7:22 PM CDT (00:22 UTC) Moonrise 9:13AMMoonset 11:14PM Illumination 34% Phase: Waxing Crescent; Moon at 6 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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GMZ455 Coastal Waters From Lower Atchafalaya River To Intracoastal City La Out 20 Nm- 339 Pm Cdt Sun Mar 29 2020
Tonight..East winds 5 to 10 knots. Seas 1 foot or less.
Monday..Southeast winds 10 to 15 knots. Seas 1 foot or less. Slight chance of showers and Thunderstorms in the afternoon.
Monday night..South winds 10 to 15 knots. Seas 1 to 3 feet. Slight chance of showers in the evening. Slight chance of Thunderstorms through the night. Chance of showers after midnight.
Tuesday..West winds 15 to 20 knots. Seas 1 to 3 feet. Slight chance of showers in the morning.
Tuesday night..North winds 15 to 20 knots. Seas 1 to 3 feet.
Wednesday..Northeast winds 10 to 15 knots. Seas 1 to 3 feet.
Wednesday night..East winds 5 to 10 knots. Seas 1 foot or less.
Thursday..Southeast winds 10 to 15 knots. Seas 1 foot or less.
Thursday night..Southeast winds 10 to 15 knots. Seas 1 foot or less. Slight chance of showers in the evening, then chance of showers after midnight.
Friday..Southeast winds 5 to 10 knots. Seas 1 foot or less. Chance of showers and Thunderstorms.
Friday night..East winds 5 to 10 knots. Seas 1 foot or less. Chance of showers and Thunderstorms.
GMZ400 Synopsis For Lower Atchafalaya River La To High Island Tx Out 60 Nm Including Sabine And Calcasieu Lakes And Vermilion Bay 339 Pm Cdt Sun Mar 29 2020
Synopsis.. A stalling cold front over the northern gulf of mexico will begin to retreat back to the north tonight and Monday, with a light to modest onshore flow resuming. Another cold front will sweep through the coastal waters on Tuesday. Southerly winds will increase on Monday night ahead of it, with modest offshore developing behind it and continuing into Wednesday.


7 Day Forecast for Marine Location Near Patterson, LA
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location: 29.37, -91.39     debug


Area Discussion for - Lake Charles, LA
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FXUS64 KLCH 292318 AFDLCH

Area Forecast Discussion National Weather Service Lake Charles LA 618 PM CDT Sun Mar 29 2020

AVIATION. IR images indcg mid and upper lvl clouds continue advect in from the eastern Pacific this evening with a few light sprinkles noted on radar. The boundary that produced the wx fm last night is located across the northern gulf attm. For tnght mainly mid and upr lvl clouds to continue advecting acrs the nrn gulf w/ ceiling heights xpcd to begin falling a bit around sunrise and drg the late mrng hrs tmrw. VSBY to rmn P6SM thru this fcst cycle.

The boundary in the gulf will be the focus of actvty development tmrw aftn/ eve timeframe as the boundary lifts moves northward into La and se Tx allowing for gulf moisture and instability to spill back into the region and precip wtr to climb. Drg this time a shrtwv trof moves into Tx/Ok and will help the development of a sfc feature ovr n Tx that will move into cntrl La drg the ovrnght hrs of Tuesday mrng. SPC has a marginal risk across cntrl La fm midnight thru sr. Storm development looks to begin drg the late aftn and increase into the eve and ovrnght. Storms xpcd to taper off twrds sr Tuesday mrng as the next front moves thru se TX and srn La. Some of these storms though are expected to be strong with the main threat attm from hail and gusty winds.

PREV DISCUSSION. /issued 336 PM CDT Sun Mar 29 2020/

SYNOPSIS . A warm front will move north across the forecast area on Monday returning Gulf moisture and the chance for showers. An upper level disturbance will provide the chance for showers and thunderstorms on Monday A few strong storm.DISCUSSION.

s may be possible with damaging winds the main concern. A cold front will move across early Tuesday ending rain chances for a few days and bringing cooler more seasonable temperatures.

Rua

DISCUSSION . The cold front that moved through last night is basically stalling just beyond the coastal waters. A northeast flow in the low levels has brought in drier air, and lower dew points, making for a less muggy and more comfortable afternoon. Southwest flow aloft is still bringing in extensive mid and high level clouds. A weak disturbance is producing enough lift to provide some returns on the radar. However, low levels are dry enough that if any rain reaches the ground it will just be a sprinkle and no real accumulation.

An upper level disturbance will be moving out of the southern Rockies on Monday. The increasing southerly flow ahead of it will help lift the cold front back north as a warm front during the day on Monday. This will bring back Gulf moisture and the chance of a few showers.

The upper level disturbance will gain strength and move out of the Southern Plains into the Lower Mississippi Valley. This will also help push a surface low and associated cold front across the region, with the cold front moving through on Tuesday morning.

Main shower activity will occur well in advance of the cold front and with the main upper level energy on Monday night. Looks like most of the lift and convection will be north of the warm front and north of the forecast area. However, should be enough increase in moisture, with precipitable water values above 1.5 inches which is above the 90th percentile for climo, that showers and a few thunderstorms will spread across the forecast area.

As the nocturnal low level jet increase, shear values will also ramp up on Monday night, with 0-3km values between 30 and 40 knots, and 0-6km between 50 and 60 knots. Instability will again be the question mark, with activity coming across at night, CAPE values are mainly around 500 j/kg, and this may very well keep convection in check. With the respectable shear values, some of the stronger convection may be able to produce some strong wind gusts, and with that the area along and north of the I-10 corridor has been outlined by SPC in a marginal risk and an area in Central Louisiana north of a Leesville to Marksville line a slight risk.

The upper level disturbance will lift off to the east quickly by Tuesday morning ending rain chances. The surface cold front is expected to move through by noon time, allowing for drier continental to move in. This will then provide some cooler and more seasonable conditions through mid week.

By the end of the week, high pressure will move off to the east allowing the Gulf to open up again, and thus an increase in moisture that will lead to the next rain chances by late Thursday night with an upper level disturbance. Rain chances will continue until a cold front moves across next Saturday.

Rua

MARINE . Cold front has moved just beyond the coastal waters and is beginning to stall there this afternoon. A modest northeast flow will continue over the coastal waters into tonight as high pressure builds down behind the front.

This cold front will move back to the north during Monday as a warm front. Therefore, a light southeast flow will develop over the coastal waters. The south winds will increase over the coastal waters on Monday night as a surface low moves out of the Southern Plains and into the Lower Mississippi Valley. Wind speeds could near 20 knots and therefore small craft exercise caution criteria.

A cold front will move across the coastal waters on Tuesday afternoon, with winds becoming modest offshore. Wind speeds again could near 20 knots on Tuesday night and the possibility of small craft exercise caution.

Rua

PRELIMINARY POINT TEMPS/POPS. AEX 59 76 64 78 / 10 60 70 10 LCH 64 81 70 84 / 0 30 50 10 LFT 65 82 70 84 / 0 40 50 20 BPT 67 80 70 82 / 10 30 40 10

LCH WATCHES/WARNINGS/ADVISORIES. LA . None. TX . None. GM . None.

AVIATION . 19


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EINL1 0 mi53 min ENE 4.1 G 4.1 73°F 65°F1018.2 hPa63°F
AMRL1 - 8764227 - Amerada Pass, LA 6 mi53 min NE 1.9 G 4.1 76°F 68°F1018.5 hPa
TESL1 - Tesoro Marine Terminal - 8764044 - Berwick, LA 22 mi53 min N 4.1 G 6 76°F 65°F1018.7 hPa
KSCF 31 mi28 min NE 13 77°F 59°F
MRSL1 - Marsh Island, LA / CSI03 36 mi83 min 13 G 14 76°F

Wind History for LAWMA, Amerada Pass, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salt Point, LA15 mi84 minVar 3 mi76°F57°F52%1018.4 hPa
Patterson Memorial, LA24 mi27 minNNE 710.00 miPartly Cloudy75°F55°F50%1019.3 hPa

Link to 5 minute data for KP92

Wind History from P92 (wind in knots)
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Last 24hrCalm3Calm3333CalmCalmN5N553NE6--NE6NE75534433
1 day agoCalmSE7SE65SE7553436453S4SE65SE6S7--4444
2 days agoCalmCalmCalm3SE4--3333--34S44554SE7SE666SE5SE4

Tide / Current Tables for Eugene Island, Louisiana
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Eugene Island
Click for Map
Sun -- 06:58 AM CDT     Sunrise
Sun -- 09:34 AM CDT     1.75 feet High Tide
Sun -- 10:12 AM CDT     Moonrise
Sun -- 11:54 AM CDT     1.56 feet Low Tide
Sun -- 04:24 PM CDT     1.61 feet High Tide
Sun -- 07:22 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.30.50.70.91.11.31.51.71.71.71.61.61.61.61.61.61.61.51.41.20.90.50.3

Tide / Current Tables for Shell Island, Louisiana
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Shell Island
Click for Map
Sun -- 12:46 AM CDT     0.14 feet Low Tide
Sun -- 06:57 AM CDT     Sunrise
Sun -- 10:11 AM CDT     Moonrise
Sun -- 10:53 AM CDT     1.34 feet High Tide
Sun -- 01:18 PM CDT     1.19 feet Low Tide
Sun -- 05:43 PM CDT     1.23 feet High Tide
Sun -- 07:22 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.10.20.30.40.60.811.11.21.31.31.31.21.21.21.21.21.21.21.110.80.5

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Lake Charles, LA (20,4,5,8)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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Gulf Stream Current


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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.