Thursday, October21, 2021
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Marine Weather and Tides
Venice, LA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:05AMSunset 6:24PM Thursday October 21, 2021 5:04 PM CDT (22:04 UTC) Moonrise 7:12PMMoonset 7:52AM Illumination 99% 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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GMZ552 Expires:202110220915;;048926 Fzus54 Klix 212043 Cwflix Coastal Waters Forecast National Weather Service New Orleans La 343 Pm Cdt Thu Oct 21 2021 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. Gmz550-552-220915- 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- 343 Pm Cdt Thu Oct 21 2021
Tonight..South winds 5 to 10 knots becoming southwest after midnight, then becoming north after midnight. Seas 2 to 4 feet. Dominant period 7 seconds.
Friday..Northeast winds 10 to 15 knots becoming east late in the afternoon. Seas 2 to 4 feet. Dominant period 7 seconds. Patchy dense fog early in the morning.
Friday night..East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 6 seconds.
Saturday..East winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 7 seconds.
Saturday night..Southeast winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 6 seconds.
Sunday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Chance of showers through the day. Slight chance of Thunderstorms in the afternoon.
Sunday night..Southeast winds 15 to 20 knots. Seas 3 to 5 feet. Dominant period 6 seconds. Slight chance of Thunderstorms in the evening. Slight chance of showers through the night.
Monday..South winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 5 seconds. Chance of showers.
Monday night..Southwest winds near 10 knots. Seas 2 to 4 feet. Dominant period 5 seconds.
Tuesday..West winds near 10 knots becoming south in the afternoon. Seas 1 to 2 feet. Dominant period 5 seconds. Slight chance of showers in the afternoon.
Tuesday night..South winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 4 seconds. Slight chance of showers after midnight.
GMZ500 Synopsis Pascagoula To Sw Pass Mississippi- Synopsis Sw Pass Mississippi River To Atchafalaya River- 343 Pm Cdt Thu Oct 21 2021
Synopsis..A weak front will move through the waters tonight, and high pressure will then build in during the day tomorrow. This high will shift toward the eastern seaboard over the weekend.


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


Area Discussion for - New Orleans/Baton Rouge, LA
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FXUS64 KLIX 212040 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 340 PM CDT Thu Oct 21 2021

SHORT TERM (Tonight through Saturday Night). Widely scattered shower and thunderstorm activity along a weak boundary extending across coastal Southeast Louisiana and into the eastern waters will come to end in the evening hours as daytime heating and overall instability wanes. The boundary will continue to sink south into the Gulf waters tonight as an upper level trough pushes east of the region.

This upper level trough is driving a pool of drier air in the mid and upper levels of the atmosphere into the region as evidenced on water vapor imagery. This dry pool will remain over the forecast area through Saturday night. Precipitable water values will decrease into the 1 to 1.25 inch range due to this dry air advection. This drier airmass will lead to weaker mid- level lapse rates and lower overall instability through the short term period. In general, some cumulus development can be expected each day beneath a mid- level inversion, but deeper updrafts will be more difficult to achieve. Have went with a dry forecast each day with POP values of 10 percent or less expected. The drier airmass will also allow for a continuation of the warmer than average daytime highs with readings remaining in the low to mid 80s. At night, generally clear skies in the evening hours should allow temperatures to quickly cool into the 60s.

Light boundary layer flow will be in place, and this should support the formation of a surface based temperature inversion each night. As this inversion deepens, conditions will become favorable for fog and low stratus formation over portions of the forecast area. The fog threat will typically be highest north of the I-12 corridor in Southeast Louisiana and Southwest Mississippi.

LONG TERM (Sunday through Wednesday). Slightly more certainty in the long term forecast today as we see more consistency in the models. On Monday an upper level shortwave trough will move through the Upper Midwest and off towards the east. This along with SE flow at the surface will bring some moisture into our CWA. PoPs will still be on the isolated side as there isn't a whole lot of forcing to help get some precipitation formed in our area. A ridge axis in the upper levels will build over our region on Tuesday, however surface flow remains out of the SE keeping some moisture around. The GFS shows more precipitation than the ECMWF, but due to the ridge axis PoPs will be more isolated than Monday however not completely dry. Temperatures continue to be unseasonably warm with high temps in the mid 80s and low temps in the upper 60s to low 70s.

Our next big weather system is expected to move in Wednesday as a deep upper level trough with an associated cold front at the surface move through our region. This brings plenty of moisture into our CWA with clear forcing with the front, so PoPs are much higher Wednesday and into Thursday. There is still some uncertainty with exact timing of this front, however the risk of some stronger thunderstorms is there as the front enters our CWA. This is something that we will need to continue to keep an eye on, so expect changes to the forecast for Wednesday and Thursday as we move forward. What is clear for now is that temperatures will cool down behind this front, with high temps expected in the mid to upper 70s and low temps in the low to mid 50s inland and the low 60s closer to the coast. -HL

AVIATION. Primary concern will be another round of fog and low stratus impacting the terminals after 06z. This fog and low stratus could linger through 15z before clearing. Prevailing IFR and LIFR conditions will be possible at all the terminals with the worst conditions occurring between 10z and 14z. After 15z, increased boundary layer mixing will allow for a return to MVFR and VFR conditions as the fog bank clears.

MARINE. As a weak front slides through the waters tonight, winds will shift to the north and increase in speed to 10 to 15 knots. These offshore winds will persist through tomorrow night before turning more easterly and then southeasterly as a surface ridge becomes more centered over the eastern seaboard over the weekend. This onshore flow regime will continue into early next week in advance of an approaching low pressure system. The pressure gradient over the waters is also expected to increase this weekend, and a period of 15 to 20 knot winds and seas of 3 to 5 feet will be possible on Saturday and Sunday.

PRELIMINARY POINT TEMPS/POPS. MCB 61 83 59 83 / 10 0 0 0 BTR 66 86 63 84 / 10 10 0 10 ASD 66 85 60 83 / 10 10 0 0 MSY 70 83 67 83 / 10 10 0 0 GPT 67 82 62 80 / 10 0 0 0 PQL 66 84 57 82 / 10 0 0 0

LIX WATCHES/WARNINGS/ADVISORIES. LA . None. GM . None. MS . None. GM . None.

PG


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSTL1 - 8760922 - Pilot's East, SW Pass, LA 1 mi53 min 86°F 79°F1017.1 hPa
BURL1 - Southwest Pass, LA 3 mi65 min 8G8.9
42084 14 mi65 min 82°F 82°F3 ft
PILL1 18 mi47 min SSE 6G9.9 79°F 79°F1018.9 hPa
GISL1 - 8761724 - Grand Isle, LA 37 mi47 min 5.1G6 84°F 78°F1018.7 hPa
KMIS 38 mi30 min 0 82°F 72°F

Wind History for Pilots Station East, SW Pass, LA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KBVE

Wind History from BVE (wind in knots)
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Tide / Current Tables for Southwest Pass, Mississippi River Delta, Louisiana (2)
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Southwest Pass
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Thu -- 06:41 AM CDT     0.38 feet Low Tide
Thu -- 07:02 AM CDT     Sunrise
Thu -- 07:51 AM CDT     Moonset
Thu -- 06:21 PM CDT     Sunset
Thu -- 07:11 PM CDT     Moonrise
Thu -- 09:11 PM CDT     1.47 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Joseph Bayou, Mississippi River Delta, Louisiana
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Joseph Bayou
Click for Map
Thu -- 06:37 AM CDT     0.41 feet Low Tide
Thu -- 07:02 AM CDT     Sunrise
Thu -- 07:51 AM CDT     Moonset
Thu -- 06:20 PM CDT     Sunset
Thu -- 07:10 PM CDT     Moonrise
Thu -- 09:13 PM CDT     1.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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