Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Slidell, LA

Version 3.4
NOTICE
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:08AMSunset 8:02PM Thursday July 18, 2019 4:16 PM CDT (21:16 UTC) Moonrise 9:32PMMoonset 7:36AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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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GMZ534 Lake Borgne- 340 Pm Cdt Thu Jul 18 2019
Tonight..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Friday..Southwest winds near 5 knots becoming south in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Slight chance of showers and Thunderstorms late in the afternoon.
Friday night..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..South winds near 5 knots becoming southeast in the late morning and afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the late morning and afternoon.
Saturday night..Southwest winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers after midnight.
Sunday..West winds near 5 knots becoming southeast in the afternoon. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers in the morning. Chance of Thunderstorms through the day. Showers likely in the afternoon.
Sunday night..West winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds. Chance of showers and Thunderstorms.
Monday..West winds near 5 knots becoming southwest late in the afternoon. Waves 1 foot or less. Chance of showers in the morning. Chance of Thunderstorms through the day. Showers likely in the afternoon.
Monday night..West winds 5 to 10 knots. Waves 1 foot or less. Chance of showers in the evening. Slight chance of Thunderstorms through the night. Showers likely after midnight.
Tuesday..West winds 5 to 10 knots. Waves 1 foot or less. Showers likely and chance of Thunderstorms.
Tuesday night..West winds 5 to 10 knots. Waves 1 foot or less. Showers likely in the evening, then chance of showers after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 340 Pm Cdt Thu Jul 18 2019
Synopsis..Surface high pressure extending across the eastern gulf and into the coastal waters will remain in control through the weekend. A weak front will stall along the coast early next week.


7 Day Forecast for Marine Location Near Slidell, LA
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location: 30.27, -89.79     debug


Area Discussion for - New Orleans/Baton Rouge, LA
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Fxus64 klix 182105
afdlix
area forecast discussion
national weather service new orleans la
405 pm cdt Thu jul 18 2019

Short term
About 20 minutes of excitement earlier this afternoon as a well formed
waterspout developed over western lake bornge near the mouth of
bayou bienvenue. This spout moved inland over the shoreline
marshes near the great flood barrier then lifted, as expected.

Several social media images and videos captured the event nicely
from various vantage points. The lake breeze boundary
intersections in that proximity, along with an outflow boundary
that was generated by the parent storm produced the waterspout on
the outflow leading edge on the NW side of the storm. The
subsequent boundary interactions established a zero propagation
region smack over the new orleans metro area - a process that is
all too common in the summer time. This resulted in stationary
storms that essentially rained themselves out over the eastern
half of the metro from mid-city into the ninth ward and n.O. East
areas. A few streets in ninth ward bywater area did flood briefly
during the peak of heaviest rainfall.

Friday could be a repeat as the overall pattern changes only
slightly and dominated mostly by lake and gulf breeze processes
and subsequent outflow features. Heading into Saturday, bermuda
ridge extension softens a bit with onshore flow advecting deeper
moisture for better rain chances, more in line with normal summer
coverage around 30-50%. Temperatures should be tempered by greater
rain and cloud coverage by Saturday.

Long term
The main concerns will be amplification of the upper level
height fields. Current zonal flow near the canadian border and
large barotropic high over the much of the lower half of the
nation will be buckling the start of the week. Troughing to
amplify over the eastern u.S. With strong ridge amplification in
the desert southwest will bring a surface frontal boundary into
the gulf states Tuesday. This front is expected to elongate over
the area and could become a focus of heavy rainfall for middle of
next week, given interactions with daily gulf breezes, brings
concerns of a flood potential in some places. There is ample time
to monitor model trends, but confidence is likely to increase over
time on both heavy rain and severe thunderstorm potential given an
out-of-season cold front in the presence of tropical moisture.

Aviation
Vfr conditions prevail at all area airports and are expected to
persist through the evening into the overnight hours. Msw

Marine
Southerly to southeasterly winds will persist through Monday of next
week. Beginning Tuesday through the end of next week, winds will be
more westerly and northerly. Winds are expected to be light (<15
knots) through the end of next week. Corresponding with the wind
speeds, the wave heights are expected to be average through the end
of next week. Msw

Decision support
Dss code: blue.

Deployed: none.

Activation: none.

Activities: ongoing river flooding
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, or direct tropical threats; events of
national significance.

Preliminary point temps pops
Mcb 73 92 73 90 10 10 0 40
btr 74 90 75 89 10 30 0 50
asd 75 92 75 90 10 10 10 50
msy 77 91 77 89 30 30 10 50
gpt 77 90 76 88 0 10 10 50
pql 75 93 75 91 0 30 10 50

Lix watches warnings advisories
La... None.

Gm... None.

Ms... None.

Gm... None.

24 rr
msw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 24 mi53 min Calm G 1 82°F 86°F1016.9 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 25 mi53 min S 8.9 G 14 86°F 86°F1018 hPa
SHBL1 - 8761305 - Shell Beach, LA 28 mi53 min SSE 11 G 13 87°F 85°F1017.9 hPa
CARL1 30 mi47 min 85°F
FREL1 35 mi47 min SSW 8 G 14 83°F 1017.1 hPa
BYGL1 - 8762482 - Bayou Gauche, LA 47 mi53 min SSW 4.1 G 7 89°F 87°F1017.7 hPa

Wind History for New Canal Station, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Slidell, Slidell Airport, LA6 mi24 minSSW 710.00 miFair89°F73°F59%1017.2 hPa
Bay St. Louis, Stennis International Airport, MS19 mi27 minS 107.00 miThunderstorm in Vicinity91°F75°F59%1016.9 hPa
New Orleans, New Orleans Lakefront Airport, LA20 mi24 minN 010.00 miFair81°F75°F85%1016.9 hPa

Wind History from ASD (wind in knots)
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Last 24hrS73S7SE3S3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3W4SW636SW7
1 day agoS10S8S9S5S5S5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--------4W6W53
2 days agoS16
G21
S11S8S7S3S4S4S4S4S4S4S6S7S7S3S6S7----S7SE5S11
G15
SE9S11

Tide / Current Tables for Bayou BonFouca, Route 433, Louisiana
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Pearlington, Pearl River, Mississippi
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
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.