Wednesday, January17, 2018 L-36.com


Marine Weather and Tides
Houma, 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 6:56AMSunset 5:29PM Wednesday January 17, 2018 7:28 PM CST (01:28 UTC) Moonrise 7:17AMMoonset 6:11PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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
GMZ550 Coastal Waters From Port Fourchon La To Lower Atchafalaya River La Out 20 Nm- Coastal Waters From The Southwest Pass Of The Mississippi River To Port Fourchon Louisiana Out 20 Mile- 322 Pm Cst Wed Jan 17 2018
.small craft advisory in effect until midnight cst tonight...
Tonight..North winds 20 to 25 knots becoming northeast 10 to 15 knots after midnight. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 4 seconds.
Thursday..Northeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 4 seconds.
Thursday night..Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 4 seconds.
Friday..East winds 10 to 15 knots. Seas 1 to 2 feet. Dominant period 6 seconds.
Friday night..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Saturday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds.
Saturday night..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 4 seconds. Areas of fog after midnight.
Sunday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 5 seconds. Slight chance of showers in the afternoon.
Sunday night..South winds 10 to 15 knots becoming southwest 15 to 20 knots after midnight. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 4 seconds. Showers likely and slight chance of Thunderstorms.
Monday..Northwest winds 15 to 20 knots. Seas 3 to 6 feet with occasional seas to 8 feet. Showers likely and slight chance of Thunderstorms in the morning, then chance of showers in the afternoon.
Monday night..North winds 15 to 20 knots. Seas 3 to 6 feet.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 322 Pm Cst Wed Jan 17 2018
Synopsis..Cold high pressure is building into the gulf coast and will eventually move to the east by the end of the week.

7 Day Forecast for Marine Location Near Houma, LA
   Hourly   EDIT   Help
location: 29.58, -90.71     debug


Area Discussion for - New Orleans/Baton Rouge, LA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 klix 172305
afdlix
area forecast discussion
national weather service new orleans la
505 pm cst Wed jan 17 2018

Short term
Arctic high pressure with record cold temperatures will settle
over the forecast area tonight in the wake the winter weather
producing storm system that moved through yesterday. Low
temperatures tonight have not changed much from the last couple
forecast cycles with values forecast to reach the mid teens over
the entire area north and west of the lake pontchartrain maurepas
into south mississippi, and mostly in the lower to mid 20s over
south of the tidal lakes, except upper 20s on the extreme
southern coastal areas of terrebonne to plaquemines parish. It is
noteworthy that temperatures are forecast to be below 20 degrees
for about 11 to 12 hours at mccomb and up to 9 to 10 hours at
baton rouge, hammond and slidell. Hard freeze duration with
temperatures 25 degrees or lower expected to be up to 14 hours in
colder northern locations and around 8 hours in metro new orleans.

The hard freeze warning is in effect for the entire area through
11 am on Thursday, and temperatures are forecast to rise above
freezing between 10 am and noon which is faster than what occurred
today.

Winds tonight are expected to become light, outside of the south
shore of lake pontchartrain, however the very cold temperatures
for a long duration will mean wind chill values down in the 8 to
15 range for most of the area for much of the night. A wind chill
advisory has been issued with this forecast package valid from 9
pm tonight through 9 am tomorrow.

While most of the area had abundant sunshine today, the amount of
time above freezing was brief, so complete melting and drying of
roadways did not occur, and icy spots on bridges, overpasses, and
even some surface level streets and roads is expected until
temperatures stay above freezing for a sufficient period tomorrow.

The heart of the arctic cold pool will finally begin to pull away
from the area tomorrow, and a more zonal flow pattern will develop
in the mid and upper levels. Temperatures should begin to modify a
bit with highs rising into the lower to middle 40s by Thursday
afternoon. This slight modification in temperatures will continue
into Thursday night as lows "only" expected to dip into the 20s
and lower 30s. A hard freeze will likely occur over the northern
half of the forecast area once again. Some higher level cloud
cover should also begin to feed into the area Thursday night and
Friday as a short wave trough approaches and moves into the
central gulf coast region from the west. This system looks to be
moisture starved in the low levels, and do not have a mention of
rain in the forecast for Friday or Friday night. Temperatures will
continue to gradually modify, and expect to see highs in the
lower to middle 50s Friday afternoon. Lows on Friday night should
finally remain above freezing across the forecast area.

Long term
A shortwave ridge axis will pass directly over the forecast area
late Saturday into early Sunday. This increase in ridging will
keep a stable airmass in place across the gulf south, and could
also support the formation of an advection fog event Saturday
night into early Sunday morning. Temperatures will continue to
warm as deep layer southerly flow takes hold, and moisture will
also return into the region from the central gulf of mexico. With
increasingly warm and moist air moving over the cooler nearshore
waters, the prospect of sea fog increases dramatically for
Saturday night. Temperatures will be in the 60s Saturday
afternoon before dipping into the upper 40s to lower 50s Saturday
night. Dewpoints will also increase into the upper 40s and lower
50s by Saturday night. Southeast winds should also remain light
enough to allow for fog to develop as opposed to a low status
deck, but obviously there is some uncertainty this far out. Given
all of the aforementioned conditions, have maintained fog in the
forecast for Saturday night.

The fog could linger for a few hours Sunday morning, but a rapidly
approaching neutrally tilted shortwave trough and associated cold
front will increase turbulent mixing and buoyancy across the
region from late Sunday morning through the afternoon hours.

Favorable jet dynamics aloft combined with increasingly difluent
flow will result in a sharp increase in forcing throughout the
atmospheric column by Sunday afternoon, so have a slight chance
of showers in the forecast.

The better chances for rain will be Sunday night into Monday when
the cold front pushes across the forecast area. Have high pop of
50 to 80 percent in the forecast. Looking at thermodynamic and
shear parameters, it looks like a line of showers and at least
isolated thunderstorms should push across the area. CAPE values
will only peak around 500 j kg, and mid-level lapse rates will be
nearly moist adiabatic. However, a strong 50 knot low level jet
looks like it will develop over the area. As a result, very strong
directional and speed shear values are expected. This low cape
and high shear event is very typical for the gulf south in the
winter months, and has the capability of producing a few strong to
possibly severe thunderstorms. Given the high storm relative
helicity values, any deeper updrafts will quickly begin rotating.

These mesocyclone dominated updrafts could support the formation
of hail, strong wind gusts, and possibly tornadoes, but the
limited instability means confidence is very low this far out
since a limiting factor for surface based convective impacts will
be the cooler nearshore waters keeping a more stable marine layer
in place.

Once the front and associated line of convection pushes through
Sunday night, a much quieter weather pattern will develop for the
first half of next week. Zonal flow will dominate, and
temperatures will be near seasonal averages each day. Highs should
climb into the lower 60s, and lows will dip into the upper 30s and
40s each day. A dry and stable airmass will be in firm control of
the forecast area, and expect to see mostly clear skies in place.

Aviation
No issues withVFR conditions expected to persist through the
forecast. Cab

Marine
Offshore winds are holding strong over the open waters and
thus have extended the scy for all open water till 6z. Ms sound and
the tidal lakes will have scs headline just for this evening. Winds
will continue to relax through the night and most if not all
headlines should be down by 4am. The strong cold 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: blue.

Deployed: none.

Activation: none.

Activities: hard freeze warnings
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 14 43 24 51 0 0 0 0
btr 15 43 25 51 0 0 0 10
asd 15 45 24 54 0 0 0 0
msy 22 42 31 54 0 0 0 0
gpt 17 45 26 52 0 0 0 0
pql 16 45 22 54 0 0 0 0

Preliminary point temps pops
Mcb 14 43 24 51 0 0 0 0
btr 15 43 25 51 0 0 0 10
asd 15 45 24 54 0 0 0 0
msy 22 42 31 54 0 0 0 0
gpt 17 45 26 52 0 0 0 0
pql 16 45 22 54 0 0 0 0

Lix watches warnings advisories
La... Hard freeze warning until 11 am cst Thursday for laz034>037-039-
040-046>050-056>072.

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

Gm... Small craft advisory until midnight cst tonight for gmz536-538-
550-552-555-557-570-572-575-577.

Ms... Hard freeze warning until 11 am cst Thursday for msz068>071-077-
080>082.

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

Gm... Small craft advisory until midnight cst tonight for gmz538-550-
552-555-557-570-572-575-577.



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
BYGL1 - 8762482 - Bayou Gauche, LA 21 mi41 min 31°F 1035.6 hPa
TESL1 - Tesoro Marine Terminal - 8764044 - Berwick, LA 29 mi41 min 31°F 41°F1035.9 hPa
AMRL1 - 8764227 - Amerada Pass, LA 34 mi41 min 31°F 40°F1035.6 hPa
EINL1 38 mi41 min 33°F 41°F1035.2 hPa17°F
FREL1 39 mi41 min 33°F 1034.3 hPa13°F
CARL1 39 mi41 min 40°F
KXPY 41 mi34 min NNE 12 G 19 34°F 16°F
NWCL1 - 8761927 - New Canal, LA 44 mi41 min 35°F 44°F1035.1 hPa
GISL1 - 8761724 - Grand Isle, LA 45 mi41 min 34°F 46°F1034.6 hPa

Wind History for West Bank 1, Bayou Gauche, LA
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last
24hr
N2
G6
NW3
G7
N2
G8
N1
G5
N2
G5
N1
G5
N1
G5
N2
N1
N2
G6
NE2
G5
N1
G4
N3
G8
NE3
G6
NE4
G7
NE4
G10
NE2
G9
NE2
G5
NE3
G6
N2
G7
NE1
G4
N1
--
NE1
G4
1 day
ago
NE1
NE2
--
--
--
SE1
E1
SE2
--
--
--
--
NE1
NE3
G6
NE2
NE3
G8
N2
G5
N2
G7
NE4
G13
N2
NE3
G8
N1
G5
N2
G8
N2
G6
2 days
ago
SE1
SE1
--
SE2
S1
--
W1
--
--
NW1
--
NE1
NE3
NE4
NE2
NE3
NE2
NE3
SE1
S2
G9
SE8
SE4
SE4
NE2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houma-Terrebonne Airport, LA3 mi1.7 hrsN 97.00 miClear0°F0°F%1035.2 hPa

Wind History from HUM (wind in knots)
8
PM
9
PM
10
PM
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last 24hrN14
G17
N12N10N12N10N12
G15
N12
G17
N10N9N9N10N10
G15
N14N12N15
G19
N13N14N14
G20
N14
G20
N14N10N9--N6
1 day agoE3CalmN3CalmCalmCalmCalmCalmN6CalmN5Calm--N12N14N14N16N14N15N16
G24
N13
G24
N18
G23
--N15
G23
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE4E4NE5NE4CalmCalmCalmSE6SE6S4Calm--Calm

Tide / Current Tables for West Bank 1, Bayou Gauche, Louisiana
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
West Bank 1
Click for Map
Wed -- 06:57 AM CST     Sunrise
Wed -- 07:15 AM CST     Moonrise
Wed -- 07:45 AM CST     0.20 feet High Tide
Wed -- 12:45 PM CST     0.18 feet Low Tide
Wed -- 01:08 PM CST     0.18 feet High Tide
Wed -- 05:26 PM CST     Sunset
Wed -- 06:09 PM CST     Moonset
Wed -- 10:24 PM CST     0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.20.10.10.10.10.10.1

Tide / Current Tables for Cocodrie, Terrebonne Bay, Louisiana
   EDIT      (on/off)   Help   One Week of Data
Cocodrie
Click for Map
Wed -- 06:57 AM CST     Sunrise
Wed -- 07:15 AM CST     Moonrise
Wed -- 10:11 AM CST     -0.10 feet Low Tide
Wed -- 05:28 PM CST     Sunset
Wed -- 06:11 PM CST     Moonset
Wed -- 11:20 PM CST     1.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.110.80.60.50.30.10-0.1-0.1-0.1-00.10.30.40.60.70.80.911.11.11.2

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 (20,4,5,8)
      (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.