Wednesday, January23, 2019

Marine Weather and Tides
Venice, LA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:53AMSunset 5:31PM Wednesday January 23, 2019 5:55 AM CST (11:55 UTC) Moonrise 9:33PMMoonset 9:54AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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
GMZ552 Expires:201901232230;;794312 Fzus54 Klix 231008 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 408 Am Cst Wed Jan 23 2019 Pascagoula To Atchafalaya River Out To 60 Mile Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest Ten Percent Of The Waves. Gmz550-552-232230- 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- 408 Am Cst Wed Jan 23 2019
.small craft advisory in effect through late tonight...
Today..South winds 20 to 25 knots becoming northwest late. Seas 6 to 8 feet. Dominant period 8 seconds. Showers until late afternoon. Chance of Thunderstorms through the day. Showers likely late.
Tonight..Northwest winds 25 knots. Seas 6 to 10 feet with occasional seas to 11 feet. Dominant period 8 seconds. Showers likely early in the evening, then slight chance of showers late in the evening.
Thursday..North winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas to 6 feet. Dominant period 8 seconds.
Thursday night..North winds 15 knots. Seas 3 to 5 feet. Dominant period 8 seconds.
Friday..Northeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Friday night..East winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 7 seconds.
Saturday..East winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds.
Saturday night..Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds.
Sunday..North winds 10 to 15 knots. Seas 2 to 3 feet. Dominant period 4 seconds.
Sunday night..Northwest winds 10 to 15 knots becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet. Dominant period 7 seconds.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 408 Am Cst Wed Jan 23 2019
Synopsis..Another cold front will push through the coastal waters late Wednesday. High pressure will settle for a short time after Wednesday and another cold front will move through the northern gulf Friday.

7 Day Forecast for Marine Location Near Venice, LA
   Hourly   EDIT   Help
location: 28.94, -89.4     debug

Area Discussion for - New Orleans/Baton Rouge, LA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 klix 230928
area forecast discussion
national weather service new orleans la
328 am cst Wed jan 23 2019

Short term A positively tilted upper level trough axis will
take on a more neutral tilt as it moves through the forecast area
today. This morning, the combination of strong positive vorticity
advection, favorable jet dynamics, and ample moisture will allow
for scattered to numerous showers and a few thunderstorms to begin
developing. By late morning and early afternoon, a strong cold
front associated with this approaching trough axis will push
across the forecast area, and expect to see a band of heavier
showers and thunderstorms impact the region. After reviewing model
soundings, it looks like the set-up will be our fairly typical
high shear and low CAPE event. Ample shear is in place with 0-6km
speed shear values around 50 knots and storm relative helicity
values in excess of 200m2 s2. However, instability is fairly
limited with marginal lapse rates of around 6.0c km, and mlcape
values of 400 j kg or less. If a severe thunderstorm manages to
develop today, the primary threats will be damaging wind gusts and
tornadoes. Due to the weak lapse rates, hail should not be a
threat with any severe storms today. After the front moves past an
area today, a quick drop in temperatures from the 60s into the 50s
and then the 40s by late this afternoon can be expected. Strong
subsidence and dry air advection in the wake of the front and
upper level trough axis will also lead to rapidly clearing skies
through the evening hours. By tomorrow morning, clear skies,
breezy conditions, and cold temperatures in the 30s can be

Deep layer northwest flow in the mid and upper levels will then
dominate the forecast area through Friday. In the low levels, a
strong high pressure system will settle over the area. A very dry
and very stable airmass will remain in place, and have clear skies
and colder than average temperatures in the forecast. Overnight
lows will drop into the 30s both Thursday and Friday nights, and
daytime highs will only warm into the middle 50s.

Long term The northwest flow pattern and a strong surface high
will remain in firm control of the forecast area through Monday.

Some modification in temperatures is expected over the weekend as
cold air advection wanes. Daytime highs should warm back to more
normal readings in the low to mid 60s from Saturday through Monday
and overnight lows will be closer to average in the upper 30s and
lower 40s.

A reinforcing front will sweep through the region late Monday
night and early Tuesday. This front should be moisture starved,
and only have a slight chance of showers in the forecast mainly
due to the fairly strong forcing anticipated along the front
itself. By Tuesday evening, the front should be in the gulf and a
drier, colder, and more stable airmass should begin to advect back
into the area for Tuesday night and Wednesday.

Aviation Most terminals will have ceilings remain at ovc060. There is a
possibility that a few sites could have tempo decks move through at
ovc003 ahead of the front and this could cause some vis reduction
this morning. Wind shift from southerly to NW with FROPA roughly
around 15z at btr, 18z msy, and 20z gpt. The front will carry mainly
shra inland while some tsra will be found along and near coastal
locations wed. There is also a slight chance that a light wintry mix
will move through at some northern terminal locations just as the
precip is moving out this evening, but even if this occurs, it is
not expected to cause any impacts.

Marine As the front passes winds will become NW and rapidly rise to around
25kt today. This will include all protected waters as well. Wind
speeds are not being handled well by any raw model guidance and
therefore the model averages are also having trouble with this. 1kft
winds are already fairly strong behind the front and it shouldn't be
difficult to bring the majority of those speeds to the sfc. It would
not be surprising to observe sustained winds up to 25kt with a
few gusts possibly to gale force on the lake and definitely over
open waters. Wind speeds will only back off a little before the
northerly winds are reinforced by another cold front moving
through Friday. Southerly winds will be back by late Saturday
ahead of the next front moving through Saturday night into Sunday
of next weekend with another set of strong winds.

Decision support
Dss code: yellow
deployed: none
activation: none
activities: small craft advisory and slight risk severe wx
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 rain; direct tropical threats; events of national

Preliminary point temps pops
Mcb 64 31 54 30 100 40 0 0
btr 64 32 55 32 100 30 0 0
asd 68 33 56 31 100 70 0 0
msy 69 37 54 37 100 60 0 0
gpt 67 35 55 34 100 80 0 0
pql 71 37 56 32 100 80 0 0

Lix watches warnings advisories
La... None.

Gm... Small craft advisory until 6 am cst Thursday for gmz536-538-550-

Small craft advisory from noon today to 6 am cst Thursday for

Ms... Coastal flood advisory until 6 am cst early this morning for

Gm... Small craft advisory until 6 am cst Thursday for gmz538-550-552-

Small craft advisory from noon today to 6 am cst Thursday for


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
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 1 mi56 min 64°F 47°F1015.7 hPa (-0.7)
BURL1 - Southwest Pass, LA 3 mi56 min SSE 15 G 15 68°F 1015.1 hPa (-0.5)68°F
PILL1 18 mi56 min S 8 G 8.9 62°F 47°F1015.2 hPa (-0.7)
KMDJ 29 mi41 min S 17 72°F 68°F
LOPL1 - Louisiana Offshore Oil Port, LA 33 mi95 min S 6 G 8.9 69°F 6 ft1015.1 hPa64°F
GISL1 - 8761724 - Grand Isle, LA 37 mi56 min ESE 2.9 G 4.1 63°F 61°F1015.1 hPa (-0.4)
KMIS 38 mi41 min S 16 G 22 68°F 64°F
KXPY 44 mi41 min E 5.1 64°F 64°F

Wind History for Pilots Station East, SW Pass, LA
(wind in knots)    EDIT      (on/off)   Help
1 day
2 days

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boothville, LA27 mi65 minSSE 74.00 miLight Rain Fog/Mist63°F62°F97%1015.4 hPa

Wind History from BVE (wind in knots)
Last 24hrE3E3E6SE7SE7SE10
2 days agoNW14

Tide / Current Tables for Pilot Station, Southwest Pass, Louisiana
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Joseph Bayou, Mississippi River, Louisiana
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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 (6,6,7,8)
      (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

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 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 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.