Friday, July28, 2017 L-36.com


Marine Weather and Tides
Mandeville, LA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:14AMSunset 7:56PM Friday July 28, 2017 12:02 PM CDT (17:02 UTC) Moonrise 10:34AMMoonset 10:42PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
GMZ530 Lake Pontchartrain And Lake Maurepas- 1034 Am Cdt Fri Jul 28 2017
Rest of today..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Tonight..West winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms after midnight.
Saturday..West winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the morning, then showers and Thunderstorms likely in the afternoon.
Saturday night..North winds 10 to 15 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Chance of showers and Thunderstorms in the evening.
Sunday..North winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Sunday night..Northeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Monday..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Monday night..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Tuesday..East winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
Tuesday night..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 1034 Am Cdt Fri Jul 28 2017
Synopsis..High pressure will remain over the northern gulf through tonight. A cold front will approach the gulf coast Saturday evening.

7 Day Forecast for Marine Location Near Mandeville, LA
   Hourly   EDIT   Help
location: 30.33, -90.08     debug


Area Discussion for - New Orleans/Baton Rouge, LA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 klix 281402
afdlix
area forecast discussion
national weather service new orleans la
902 am cdt Fri jul 28 2017

Sounding discussion...

the sounding is similar to yesterday with pw below average at 1.6
inches. The drier air aloft will again allow for mostly clear
skies and quick heating through the morning. A subsidence
inversion at 850 mb and lack of lift will keep almost all areas
storm free today. There remains a chance for an isolated storm or
two late in the afternoon and if one forms it could be strong,
with downbursts possible. Most likely any storms would be later
tonight across southwest mississippi as the front approaches.

Winds are westerly to 600 mb then switch to northeast aloft.

Krautmann

Prev discussion issued 503 am cdt Fri jul 28 2017
short term (today through Sunday night)...

once again, only small adjustments were made to the forecast with
this package as forecast reasoning has not changed.

Expect another hot and humid day today as a broad area of surface
high pressure will remain across the gulf coast area, and a
mid level ridge will extend from the southwest states to the
central gulf coast. A potent shortwave trough and low pressure
area will be moving southeast across the great lakes region today
with the associated cold front pushing into the tennessee valley
and lower mississippi valley. Showers and thunderstorms will
develop along and ahead of the front, but should remain north of
the forecast area through the afternoon today. Expect afternoon
temperatures to top out in the mid 90s with dewpoints in the low
to mid 70s. This will result in afternoon apparent temperatures of
100 to 105 degrees.

Rain chances begin to increase overnight tonight as the shortwave
trough and low pressure system moves southeast towards the mid
atlantic region and southeast states. This will continue to force
the surface front toward the gulf coast. Highest rain chances
look to be during the day Saturday with showers and thunderstorms
likely for most of the area. A few strong to severe storms can't
be ruled out, especially over southeast mississippi and north of
lake pontchartrain where slightly stronger wind fields are
expected. The main concerns with this system will be frequent
lightning, locally heavy rain, and strong gusty winds. The cooler
and drier air behind the front will start to be felt Saturday
night with lows in the upper 60s expected in southwest mississippi
and portions of adjacent east central southeast louisiana with
lower 70s down to areas north and west of lake pontchartrain and
across the mississippi gulf coast.

By Sunday, most of the showers and thunderstorms are expected to
be over the coastal waters off the south louisiana coast, and
drier air will be filtering into the area behind the cold front.

Because of the high Sun angle this time of year, absence of clouds
and the lower humidity, we won't see too much of an impact on our
afternoon temperatures, but the drier air should have a fairly
decent cooling effect on the overnight lows. Lows Sunday night are
again expected to drop into the upper 60s and lower 70s for the
northern half of the area which is a few degrees below normal.

South of the tidal lakes, the warm water temperatures will likely
limit the effects of the drier air so will continue to carry lows
in the mid 70s.

Long term (Monday through Thursday night)...

a stacked and nearly stationary trough is expected to extend
above the surface front into the mid levels over the gulf coast
region on Monday, and this "troughiness" and the old frontal
boundary will have to watched through the entire week, as it will
be reinforced by a series of shortwave troughs moving south and
southeast across the plains and mississippi valley into the mean,
retrograding mid level trough over the southeast states and
central gulf coast region. A push of increased moisture from the
east will already onset on Monday providing a slight chance of
showers and possibly some thunderstorms over eastern and coastal
sections of the forecast area. The lingering frontal boundary will
then likely have an increasing focus for showers and thunderstorms
each day Tuesday through Thursday with rain chances expected to
rise through the period. Mid level low pressure or a shortwave
trough will be interacting with the old frontal boundary Wednesday
into Thursday which could produce a substantial threat of heavy
rainfall from thunderstorms, so this will need to be monitored.

22 td
aviation...

overall things should remain fairly quiet today for
all terminals.VFR conditions are expected through today but late
tonight likely after 06z we should begin to see shra and possibly
tsra slowly return as a late july cold front works towards the
region. Cab
marine...

one last day of diurnal conditions dominating the winds over the
marine zones as a cold front works into the region Saturday and is
actually expected to push through the coastal waters early
Sunday. Late tonight and early tomorrow winds could be 10-15 kts
out of the east over much of the region but winds will begin to
slack off midday and more so Saturday afternoon as the front sinks
towards and eventually off the coasts. Once the front moves into
the waters winds will veer around becoming offshore and could be
15-20 kts east of the ms delta Saturday night and into Sunday
morning. In addition the cold front will bring numerous showers
and thunderstorms Saturday and Saturday night. Winds will not
remain offshore for long as onshore flow returns Mon after as a
weak wave tries develop along the stalled front just south of the
outer waters. Cab
dss code: green.

Deployed: none.

Activation: none.

Activities: none.

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.

Yellow = heightened impacts with short-fused watch, warning or
advisory issuances; radar support.

Orange = high impacts; slight to moderate risk severe; nearby tropical
events; hazmat or other large episodes.

Red = full engagement for moderate risk of severe and or
direct tropical threats; events of national significance.

Preliminary point temps pops
Mcb 94 75 87 68 10 50 60 20
btr 95 78 88 70 10 30 70 30
asd 94 78 88 71 10 30 70 30
msy 95 79 89 75 0 20 70 50
gpt 94 78 89 72 10 30 70 30
pql 94 77 89 70 10 30 70 30

Lix watches warnings advisories
La... None.

Gm... None.

Ms... None.

Gm... None.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 21 mi44 min NW 2.9 G 8 87°F 88°F1015.5 hPa
FREL1 24 mi44 min WNW 1 G 6 90°F 1014.5 hPa74°F
OSTF1 - Stennis Test Facility 25 mi72 min W 3.9 G 7.8 88°F 1016.1 hPa (+0.5)75°F
CARL1 28 mi44 min 87°F
SHBL1 - 8761305 - Shell Beach, LA 39 mi44 min NNW 8.9 G 9.9 86°F 91°F1015.6 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 40 mi44 min WNW 4.1 G 8 87°F 86°F1015.3 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 41 mi44 min WNW 5.1 G 7 87°F 88°F1015.8 hPa

Wind History for New Canal Station, LA
(wind in knots)    EDIT      (on/off)   Help
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
-12
PM
8
AM
9
AM
10
AM
11
AM
Last
24hr
N5
N5
N5
N4
NW3
NW2
NW2
N2
N1
SW2
SW4
SW4
SW3
SW3
W5
W5
G8
W4
G8
W5
G8
W4
G8
W5
G10
W5
G8
W4
G8
NW3
G7
1 day
ago
N3
NW3
NW3
NW2
E5
G8
SE3
G7
E2
S1
S2
SW3
S3
W2
W2
W2
G5
W4
NW4
G7
NW5
NW2
G7
N7
G11
N8
G11
N7
N7
2 days
ago
NW4
G11
N13
G17
N8
N7
N7
NE3
NE6
NE4
N1
--
--
--
SE2
S2
S2
SW1
SW2
W5
W6
G9
W5
G10
W4
G8
N5
G9
NW3
NW2
G6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA14 mi69 minW 510.00 miFair89°F72°F57%1015.4 hPa
Hammond, Hammond Municipal Airport, LA22 mi67 minW 610.00 miFair90°F69°F52%1015.6 hPa

Wind History from ASD (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrW3NW4N643CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm34N5W55
1 day agoN7N4N44S9CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3N3NW46N4
2 days agoN7N7NW445N3CalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalmN3NW5NW4N4N5

Tide / Current Tables for Tchefuncta River, Lake Pontchartrain, Louisiana
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tchefuncta River
Click for Map
Fri -- 06:16 AM CDT     Sunrise
Fri -- 09:20 AM CDT     0.18 feet Low Tide
Fri -- 11:34 AM CDT     Moonrise
Fri -- 07:57 PM CDT     Sunset
Fri -- 10:05 PM CDT     0.34 feet High Tide
Fri -- 11:43 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.40.40.30.30.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.3

Tide / Current Tables for Bayou BonFouca, Route 433, Louisiana
   EDIT      (on/off)   Help   One Week of Data
Bayou BonFouca
Click for Map
Fri -- 06:15 AM CDT     Sunrise
Fri -- 08:30 AM CDT     0.16 feet Low Tide
Fri -- 11:32 AM CDT     Moonrise
Fri -- 07:55 PM CDT     Sunset
Fri -- 09:41 PM CDT     0.31 feet High Tide
Fri -- 11:41 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.30.30.30.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.3

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for New Orleans/Baton Rouge, LA (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station New Orleans/Baton Rouge, LA
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


Ad by Google

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.