Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Mandeville, LA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:22AMSunset 7:32PM Sunday April 22, 2018 4:57 PM CDT (21:57 UTC) Moonrise 11:20AMMoonset 12:28AM Illumination 51% Phase: First Quarter Moon; Moon at 7 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- 301 Pm Cdt Sun Apr 22 2018
.small craft exercise caution in effect through Monday morning...
Tonight..West winds 15 to 20 knots. Waves 2 to 3 feet. Dominant period 4 seconds.
Monday..West winds 10 to 15 knots. Waves 2 feet. Dominant period 4 seconds.
Monday night..West winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Tuesday..Northwest winds 5 to 10 knots. Waves 1 foot. Dominant period 4 seconds.
Tuesday night..North winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday..Northwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Wednesday night..North winds 10 to 15 knots. Waves 1 to 2 feet. Slight chance of showers after midnight.
Thursday..Northwest winds 10 to 15 knots. Waves 2 feet. Chance of showers.
Thursday night..North winds 5 to 10 knots. Waves 1 to 2 feet.
Friday..Northwest winds 5 to 10 knots. Waves 1 foot or less. Slight chance of showers.
Friday night..North winds near 10 knots. Waves 1 to 2 feet. Slight chance of showers.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 301 Pm Cdt Sun Apr 22 2018
Synopsis..A cold front will push east of the coastal waters tonight. High pressure will build in over the region Monday and prevail through the week.

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


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 222051
afdlix
area forecast discussion
national weather service new orleans la
351 pm cdt Sun apr 22 2018

Synopsis
Latest surface analysis showed a 1010mb low over east central and
southeast mississippi and an associated cold front extending from
the low to southwest to terrebonne parish. Surface dewpoint 65 to
70f was ahead of the front over mississippi coast and 60 to 65f
west of the front. Upper air analysis showed a deep low over
arkansas and 120 knot jet MAX across north texas to louisiana.

This jet MAX along with low level southeast flow this morning
helped veering winds across the forecast area this morning. As a
result, isolated strong showers were able to rotate across the
forecast this morning. 18

Short term
The low pressure and frontal system will progress east of the
forecast area tonight. Rain chances will be decrease across the
east this evening. Any lingering showers over far eastern areas
should end early this evening with drier and cooler air expected
to filter into the area tonight as the cold front pushes into the
eastern gulf coast region. Upper level low will slowly advance
east across the tennessee valley on Monday night yielding possibly
wrap-around clouds affecting temperatures. Have removed slight
rain chances across the north Tuesday and Tuesday night.

Otherwise, temperatures are expected to remain a rather comfortable
range with lows in the 50s to near 60 and highs in the 70s.

Long term
A series of a reinforcing series of shortwave troughs in the
larger longwave trough over the eastern u.S. Are expected to move
southeast from the northern plains and upper mississippi valley
across the mid to lower mississippi valley and southeast states
through the middle to late part of the week. There are still some
differences in model solutions and run to run consistency with
timing, strength and orientation of these shortwaves, weak cold
fronts and moisture precipitation content as they move across the
lower mississippi valley and central gulf coast regions.

However, some agreement exist Thursday and Thursday night. Precip
will break out Thursday afternoon and evening across the north
zone and decrease in coverage into Friday morning. Will maintain
the latest blended guidance supports a slight low chance of
showers Friday into Friday night. Weekend for now looks dry.

Temperatures are expected to continue to average slightly below
the seasonal normals which means nice spring weather considering
dewpoint temperatures should be mostly in the 50s through the
period.

Aviation
After the rains, gradually improving conditions are expected from
15 to 16z through the afternoon hours and evening hours. All of
the terminals will seeVFR conditions in place by 06z tomorrow.

Marine
Increased gradient flow in advance of a passing low pressure this
afternoon will result in onshore winds of 20 knots and seas of 4
to 6 feet in the open gulf waters and sounds east of the
mississippi river. Have issued a small craft advisory for open
water expiring at 7 pm this evening with the frontal passage. Winds
are expected to shift to the west for tonight and tomorrow, and
exercise caution flags will maintain overnight over the open gulf
waters. Prevailing offshore winds of 10 to 15 knots are expected
from Tuesday through Friday. However, a brief surge of winds over
the open gulf waters Wednesday night in the wake of a passing cold
front could push winds into the 15 to 20 knot range for few
hours. Seas of 2 to 4 feet are generally expected for most of the
week. 18

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: assessing thunderstorm risk for today
sandhill crane nwr outreach support
new orleans navy week support
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 rainfall; direct tropical threats; events of
national significance.

Preliminary point temps pops
Mcb 53 73 53 76 10 0 10 10
btr 53 76 56 79 0 0 0 10
asd 55 75 55 78 10 0 0 10
msy 57 76 59 79 10 0 0 0
gpt 57 75 59 77 10 0 0 10
pql 55 75 54 77 20 10 0 10

Lix watches warnings advisories
La... None.

Gm... Small craft advisory until 7 pm cdt this evening for gmz532-536-
538-550-552-555-557-570-572-575-577.

Ms... None.

Gm... Small craft advisory until 7 pm cdt this evening for gmz536-538-
550-552-555-557-570-572-575-577.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 21 mi39 min WNW 6 G 13 75°F 69°F1010.5 hPa
FREL1 24 mi39 min W 5.1 G 13 77°F 1009.5 hPa
CARL1 28 mi39 min 58°F
SHBL1 - 8761305 - Shell Beach, LA 39 mi45 min WSW 14 G 19 78°F 74°F1010.1 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 40 mi45 min W 11 G 20 78°F 69°F1009.6 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 41 mi39 min WNW 12 G 14 78°F 74°F1010.8 hPa

Wind History for New Canal Station, LA
(wind in knots)    EDIT      (on/off)   Help
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E4
G11
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NE4
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N6
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA14 mi64 minWNW 7 G 1510.00 miA Few Clouds79°F64°F60%1009.9 hPa
New Orleans, New Orleans Lakefront Airport, LA20 mi64 minWNW 1810.00 miFair and Breezy76°F66°F72%1009.8 hPa
Hammond, Hammond Municipal Airport, LA22 mi62 minWNW 8 G 1710.00 miMostly Cloudy77°F62°F61%1010.8 hPa

Wind History from ASD (wind in knots)
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Last 24hrSE10
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SE6SE6E6E4E5SE43SE5SE5SE11SE9SE7SE8SE9SE9SE9SE10S15
G29
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W7
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1 day agoS6S4SE4CalmCalmCalmCalmN3CalmCalmCalmCalmCalmNE3NE3CalmNE4CalmSE9SE5SE11
G15
SE8E12E9
G14
2 days agoN10
G15
N7
G16
N6N7N7N5N5N6N10N6N4N6N4NE5N6NE9NE9NE8CalmCalmCalmE6CalmSW5

Tide / Current Tables for Tchefuncta River, Lake Pontchartrain, Louisiana
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Tchefuncta River
Click for Map
Sun -- 12:13 AM CDT     0.73 feet High Tide
Sun -- 01:28 AM CDT     Moonset
Sun -- 06:25 AM CDT     Sunrise
Sun -- 12:19 PM CDT     Moonrise
Sun -- 12:59 PM CDT     -0.09 feet Low Tide
Sun -- 04:46 PM CDT     First Quarter
Sun -- 07:32 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.70.60.60.50.40.30.20.10-0-0.1-0.1-0.1-000.10.20.30.40.50.60.6

Tide / Current Tables for Bayou BonFouca, Route 433, Louisiana
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Bayou BonFouca
Click for Map
Sun -- 01:27 AM CDT     Moonset
Sun -- 06:24 AM CDT     Sunrise
Sun -- 12:09 PM CDT     -0.08 feet Low Tide
Sun -- 12:18 PM CDT     Moonrise
Sun -- 04:46 PM CDT     First Quarter
Sun -- 07:31 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.60.60.50.50.40.30.20.10-0-0.1-0.1-0.1-000.10.20.30.30.40.50.60.6

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Southeast    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New Orleans/Baton Rouge, LA (17,4,5,8)
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Ground Weather Radar Station New Orleans/Baton Rouge, LA
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weather_mapweather_map weather_map

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.