Tuesday, January16, 2018 L-36.com


Marine Weather and Tides
Slidell, 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 6:54AMSunset 5:23PM Tuesday January 16, 2018 7:25 PM CST (01:25 UTC) Moonrise 7:30AMMoonset 6:14PM Illumination 0% Phase: New Moon; Moon at 0 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- 313 Pm Cst Tue Jan 16 2018
.small craft advisory in effect through Wednesday morning...
Tonight..North winds 20 to 25 knots. Waves 3 to 5 feet. Dominant period 4 seconds. Showers, light freezing rain, snow and light sleet likely early in the evening, then chance of light sleet late in the evening. Chance of light freezing rain and snow in the late evening and early morning.
Wednesday..North winds 15 to 20 knots with frequent higher gusts. Waves 3 to 5 feet. Dominant period 4 seconds.
Wednesday night..Northeast winds 10 to 15 knots. Waves 2 to 4 feet. Dominant period 4 seconds.
Thursday..Northeast winds 10 to 15 knots easing to near 5 knots late in the afternoon. Waves 1 to 2 feet. Dominant period 4 seconds.
Thursday night..Northeast winds near 5 knots. Waves less than 1 foot. Dominant period 4 seconds.
Friday..East winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Friday night..Southeast winds 5 to 10 knots. Waves 1 foot or less. Dominant period 4 seconds.
Saturday..Southeast winds 5 to 10 knots. Waves 1 to 2 feet. Dominant period 4 seconds.
Saturday night..Southeast winds 10 to 15 knots. Waves 1 to 2 feet.
Sunday..Southeast winds 10 to 15 knots. Waves 1 to 3 feet. Chance of showers and slight chance of Thunderstorms.
Sunday night..South winds 10 to 15 knots becoming west after midnight. Waves 1 to 2 feet. Showers likely and slight chance of Thunderstorms.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 313 Pm Cst Tue Jan 16 2018
Synopsis..A strong arctic cold front has moved through the coastal waters with cold high pressure building in its wake through late Wednesday. The high will then move to the east by the end of the 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 162135
afdlix
area forecast discussion
national weather service new orleans la
335 pm cst Tue jan 16 2018

Short term
The short term hi res and global models have continued the trend
since yesterday morning of slightly higher QPF late this afternoon
and evening. Indeed the precip band has held together well on
radar today as it has moved south across la and ms. A quick couple
reasons..The SW winds just above the arctic airmass at the
surface on the 18z sounding implies more effective isentropic lift
than a more westerly wind would. Very strong frontogenetic
forcing is supplying lift and the base of this accompanying 500 mb
shortwave is swinging through the region a little further south
than anticipated.

Despite this event still having overall very light precipitation,
there is increasing concern for a light glaze of ice this evening
across the new orleans metro, northshore, and coastal mississippi.

Model soundings support freezing rain or sleet across southern areas
early this evening, transitioning to just light snow on the back
side. It only takes a minimal amount of ice accumulation on roadways
to make travel hazardous. Primary concern is light ice and snow
accumulation on the bridges and elevated roadways region wide.

Temperatures are dropping quickly across northern areas due to
strong cold air advection. As the precip ends around midnight bitter
cold becomes primary concern, which will freeze up any remaining
moisture on roadways. By 12z Wednesday the 1045 mb surface high will
be centered over eastern oklahoma. This is very close to the gulf
coast for a true arctic high and as such we will be experiencing
near record cold temperatures. Low temperatures early Wednesday
morning will be in the upper teens across inland northern areas and
low 20s near the coast. Winds at this time will still be blowing
from the north at 10 to 15 mph and gusting to 25 mph south of the
tidal lakes. This will result in dangerous single digit wind chill
values. Temperatures will only recover into the mid 30s Wednesday
afternoon. Expect Wednesday night to Thursday morning to be just
about as cold with hard freeze conditions.

Records lows for jan 17
mccomb 11 (1977) ... Forecast 15
baton rouge 18 (1977) ... Forecast 19
new orleans 23 (1977) ... Forecast 23
record lows for jan 18
mccomb 18 (1997) ... Forecast 17
baton rouge 16 (1948) ... Forecast 18
new orleans 22 (1948) ... Forecast 24

Long term
The gradual warm up into the weekend begins Friday as the surface
high pressure drifts east and the airmass finally modifies. Lows
Friday night will remain above freezing across all areas. Daytime
highs near 70 Saturday and Sunday. A 500 mb trough passes north of
the region late Sunday into Monday, which will bring another cold
front across the central gulf coast. This one looks much warmer with
rain and maybe some thunderstorms. Only a slightly cooler airmass
will build in behind with temperatures close to climatology.

Krautmann

Aviation
Main issue with terminals are going to be ifr to MVFR
cigs, MVFR vsbys, and winter precip. All terminals will see frozen
precip at some point from now till 9z. Btr and mcb are already
dealing with ip and sn and these should start to come to an end
between 0-3z tonight. As for the rest of the terminals -ra and -fzra
will start between 22 and 02z (beginning from west to east). Msy
will likely begin to see pl and sn mix in around 0-02z. Again
precip should begin to taper off from west to east around 4z
through 9z with the last gasps over coastal ms and gpt. Other
issue will be strong winds in the ll. Not expecting any
significant llws but winds could increase about 15-20kts in the
first 500-1k feet. Cab

Marine
Strong offshore winds are developing in the wake of the
strong arctic cold front which moved through this morning. Small
craft advisory conditions are developing across all of the coastal
waters. See no reason to make adjustment to this and will keep
headlines as is. Still looks like sustained winds should be in the
mid to upper portion of advisory criteria and could see a few gale
force gusts. Winds will remain elevated into Wednesday night before
easing on Thursday as strong high pressure builds into the region.

The high will shift to the east by the end of the week as the next
system begins to approach the area from the western gulf.

Decision support
Dss code: yellow.

Deployed: none.

Activation: none.

Activities: winter weather advisories
hard freeze freeze warnings
wind chill advisory
small craft advisory
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 15 35 17 46 40 0 0 0
btr 19 36 18 46 40 0 0 0
asd 20 36 20 46 70 0 0 0
msy 23 35 24 45 70 0 0 0
gpt 20 36 20 46 70 0 0 0
pql 20 36 20 47 70 0 0 0

Lix watches warnings advisories
La... Freeze warning until noon cst Wednesday for laz066>070.

Freeze warning from 6 pm Wednesday to 10 am cst Thursday for
laz066>070.

Wind chill advisory from 9 pm this evening to 11 am cst
Wednesday for laz034>037-039-040-046>050-056>072.

Hard freeze warning until noon cst Wednesday for laz034>037-039-
040-046>050-056>065-071-072.

Hard freeze warning from 5 pm Wednesday to 11 am cst Thursday
for laz034>037-039-040-046>050-056>065-071-072.

Winter weather advisory until midnight cst tonight for
laz034>037-039-040-046>050-056>065-071-072.

Gm... Small craft advisory until 6 pm cst Wednesday for gmz536-538-550-
552-555-557-570-572.

Small craft advisory until midnight cst Wednesday night for
gmz575-577.

Small craft advisory until noon cst Wednesday for gmz530-532-534.

Ms... Wind chill advisory from 9 pm this evening to 11 am cst
Wednesday for msz068>071-077-080>082.

Hard freeze warning until noon cst Wednesday for msz068>071-077-
080>082.

Hard freeze warning from 5 pm Wednesday to 11 am cst Thursday
for msz068>071-077-080>082.

Winter weather advisory until midnight cst tonight for
msz068>071-077-080>082.

Gm... Small craft advisory until 6 pm cst Wednesday for gmz538-550-552-
555-557-570-572.

Small craft advisory until midnight cst Wednesday night for
gmz577.

Small craft advisory until noon cst Wednesday for gmz532-534.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWCL1 - 8761927 - New Canal, LA 24 mi37 min N 23 G 30 34°F 48°F1032.5 hPa
WYCM6 - 8747437 - Bay Waveland Yacht Club, MS 25 mi37 min N 19 G 24 35°F 49°F1031.5 hPa
SHBL1 - 8761305 - Shell Beach, LA 28 mi37 min N 22 G 26 36°F 51°F1031.3 hPa
CARL1 30 mi37 min 41°F
FREL1 35 mi37 min N 11 G 16 31°F 1031.9 hPa30°F
BYGL1 - 8762482 - Bayou Gauche, LA 47 mi37 min N 1 G 8.9 33°F 48°F1032.6 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 mi32 minN 12 G 184.00 miLight Snow Fog/Mist31°F28°F89%1032.6 hPa
Bay St. Louis, Stennis International Airport, MS19 mi90 minN 11 G 1710.00 miOvercast34°F26°F75%1031.8 hPa
New Orleans, New Orleans Lakefront Airport, LA20 mi32 minN 21 G 2710.00 miOvercast and Breezy34°F30°F85%1032.3 hPa

Wind History from ASD (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmN4CalmCalmN4CalmCalmN4N8N12N15N17N13
G19
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G23
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N9
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N11N12
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1 day agoCalmCalmCalmCalmCalmCalmN3CalmN3N4CalmN4N3CalmNE4NE3Calm3S5S7S7CalmCalmCalm
2 days agoN6N4N5N4N5N5N5N5N6N5N7NE6N7N8N8N7N5N3Calm3Calm3CalmCalm

Tide / Current Tables for Bayou BonFouca, Route 433, Louisiana
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Bayou BonFouca
Click for Map
Tue -- 06:29 AM CST     Moonrise
Tue -- 06:30 AM CST     0.40 feet High Tide
Tue -- 06:56 AM CST     Sunrise
Tue -- 05:14 PM CST     Moonset
Tue -- 05:22 PM CST     Sunset
Tue -- 05:37 PM CST     -0.28 feet Low Tide
Tue -- 08:18 PM CST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.10.20.30.30.40.40.40.40.30.20.20.1-0-0.1-0.2-0.2-0.3-0.3-0.3-0.2-0.2-0.1-0.1

Tide / Current Tables for Pearlington, Pearl River, Mississippi
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Pearlington
Click for Map
Tue -- 01:09 AM CST     0.91 feet High Tide
Tue -- 06:29 AM CST     Moonrise
Tue -- 06:55 AM CST     Sunrise
Tue -- 11:37 AM CST     -0.64 feet Low Tide
Tue -- 05:13 PM CST     Moonset
Tue -- 05:21 PM CST     Sunset
Tue -- 08:18 PM CST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.90.90.80.60.40.2-0-0.2-0.4-0.6-0.6-0.6-0.6-0.5-0.4-0.3-0.2-00.10.30.40.60.7

Weather Map and Satellite Images
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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 (20,4,5,8)
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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.