Monday, August20, 2018 L-36.com


Marine Weather and Tides
Lacombe, LA

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Sunrise 6:28AMSunset 7:36PM Monday August 20, 2018 10:01 AM CDT (15:01 UTC) Moonrise 2:38PMMoonset 12:33AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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- 334 Am Cdt Mon Aug 20 2018
Today..Southwest winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the morning, then showers and Thunderstorms in the afternoon.
Tonight..Southwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Tuesday..West winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Showers and Thunderstorms likely.
Tuesday night..Northwest winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Wednesday..Northwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday night..North winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Thursday..North winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Thursday night..Northeast winds near 5 knots becoming northwest in the late evening and early morning, then becoming north after midnight. Waves 1 foot or less. Dominant period 4 seconds.
Friday..Northeast winds near 5 knots becoming east late in the afternoon. Waves less than 1 foot. Slight chance of showers and Thunderstorms.
Friday night..South winds 5 to 10 knots becoming east after midnight. Waves 1 foot or less. Slight chance of showers and Thunderstorms after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 334 Am Cdt Mon Aug 20 2018
Synopsis.. A ridge of high pressure will prevail over the northern gulf of mexico through Tuesday. A cold front will enter the coastal waters early Wednesday.


7 Day Forecast for Marine Location Near Lacombe, LA
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location: 30.25, -90.04     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 201320
afdlix
area forecast discussion
national weather service new orleans la
820 am cdt Mon aug 20 2018

Sounding discussion
This morning's sounding had no issues. Pwat is 2.28 inches which
continues the unusually moist trend from the past couple of days.

The climatology average for this day is 1.85 inch and the 90th
percentile is 2.18 inches. Rh values up to 500mb are also high
with the lowest at 77% around 925mb and a peak right at 500mb that
is 97%. Winds at the surface are calm then becomes W to wsw at
15-20 knots, then shift more southerly. At about 300mb winds
shift to n-nw 5-10 knots. The atmosphere is currently capped but
with the CAPE and the low convt, but it will erode with time once
the Sun comes out.

-bl

Prev discussion issued 435 am cdt Mon aug 20 2018
short term...

a front is on its way. It can be seen moving southeast through
oklahoma and north texas this morning. Once it reaches louisiana,
the front will slow up considerably and finally make its way to
the coast by Tuesday. Mid level dry air moves in ahead of this
front causing pw values to fall overnight tonight for most areas.

This will help drop precip chances just a bit. But there will
still be some sh TS develop along the boundary as it moves into
the area Tuesday. There are a few locations that could remain to
the south of the front. These locations are definitely on the
south shore but may only be at the coast. A reinforcing surge of
dry air comes in to force the front into the gulf Wed morning per
gfs and Thu morning per euro. Confidence is high that this will
take place, exactly when is in question. Regardless, the dry air
behind the front and upper 80s to lower 90s temps will be a nice
change. Fri will see the moisture begin to return from the gulf
bringing rain chances back to where they are currently.

Aviation...

just a few stray showers remain over the area at the present time
but shower and thunderstorm activity will quickly re-ignite as we
near sunrise. Outside of the convection,VFR conditions are
generally expected. That said, most areas will see some shower and
thunderstorm activity today with shra and tsra prevailing at most of
the terminals through the afternoon hours.

Marine...

very little change in the forecast. High pressure will remain over
the region through Tuesday before a weak front drifts into the area.

The evenutal progression of the front will play a large role in the
wind direction over the coastal waters by mid week. Main concern for
the coastal waters will be showers and thunderstorms each day,
beginning in the pre-dawn and morning hours and persisting
throughout the day.

Decision support...

dss code: blue.

Deployed: none.

Activation: none.

Activities: flash flood watch in effect
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 rain; direct tropical threats; events
of national significance.

Preliminary point temps pops
Mcb 89 73 92 69 70 30 50 10
btr 89 76 91 70 70 30 70 10
asd 89 76 91 72 70 30 60 20
msy 89 78 91 76 70 30 60 30
gpt 88 77 91 74 70 30 60 30
pql 89 76 91 72 70 20 60 30

Lix watches warnings advisories
La... Flash flood watch until 7 pm cdt this evening for laz058-060>064.

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 16 mi32 min SSW 7 G 9.9 85°F 85°F1017.5 hPa
CARL1 22 mi32 min 86°F
FREL1 23 mi38 min SSW 6 G 9.9 85°F 1016.5 hPa
SHBL1 - 8761305 - Shell Beach, LA 33 mi38 min SSW 11 G 14 84°F 88°F1018 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 38 mi38 min SSW 6 G 12 82°F 84°F1017.7 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 38 mi38 min SSW 5.1 G 7 83°F 83°F1017.9 hPa

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA14 mi69 minSW 610.00 miMostly Cloudy85°F77°F77%1017.1 hPa
New Orleans, New Orleans Lakefront Airport, LA15 mi69 minSSW 1010.00 miA Few Clouds85°F77°F77%1016.8 hPa
New Orleans, New Orleans International Airport, LA22 mi69 minSSW 710.00 miFair85°F79°F82%1017.6 hPa

Wind History from ASD (wind in knots)
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CalmCalmCalmS3SE3SW53CalmCalmCalmCalmS3CalmCalmS3CalmCalmCalmS5SW6
1 day ago3E8SE33S8S10S7SW5SW3NE3NE5SW5CalmCalmCalmCalmSW3CalmCalmCalmSW4CalmCalm6
2 days agoCalmCalmNW4SW9S9SW8S8SW11SE6CalmCalmCalmCalmCalmCalmS4S6CalmCalmCalmN3CalmCalmCalm

Tide / Current Tables for Tchefuncta River, Lake Pontchartrain, Louisiana
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Tchefuncta River
Click for Map
Mon -- 01:33 AM CDT     Moonset
Mon -- 03:47 AM CDT     0.06 feet Low Tide
Mon -- 06:30 AM CDT     Sunrise
Mon -- 03:38 PM CDT     Moonrise
Mon -- 04:09 PM CDT     0.68 feet High Tide
Mon -- 07:36 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 Bayou BonFouca, Route 433, Louisiana
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Bayou BonFouca
Click for Map
Mon -- 01:32 AM CDT     Moonset
Mon -- 02:57 AM CDT     0.06 feet Low Tide
Mon -- 06:29 AM CDT     Sunrise
Mon -- 03:36 PM CDT     Moonrise
Mon -- 03:45 PM CDT     0.61 feet High Tide
Mon -- 07:35 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 and Satellite Images
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wmap_A
GOES 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 New Orleans/Baton Rouge, LA (11,2,3,4)
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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 numerious 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.