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Marine Weather and Tide Forecast for Laplace, LA

January 21, 2025 2:22 AM CST (08:22 UTC) Change Location
Sunrise 6:55 AM   Sunset 5:30 PM
Moonrise 12:00 AM   Moonset 11:11 AM 
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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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GMZ530 Lake Pontchartrain And Lake Maurepas- 836 Pm Cst Mon Jan 20 2025

.small craft advisory in effect through Tuesday evening - .

Rest of tonight - Northeast winds 15 to 20 knots, increasing to 20 to 25 knots. Waves 2 to 3 feet. A chance of snow late.

Tuesday - North winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Waves 2 to 4 feet. Snow. Visibility 1 nm or less.

Tuesday night - North winds 15 to 20 knots with gusts up to 25 knots. Waves 2 to 3 feet. A slight chance of snow in the evening.

Wednesday - Northeast winds 10 to 15 knots with gusts up to 20 knots, becoming east around 5 knots in the afternoon. Waves 1 to 2 feet in the morning, then 1 foot or less.

Wednesday night - East winds around 5 knots, becoming north after midnight. Waves 1 foot or less.

Thursday - North winds 5 to 10 knots. Waves 1 foot or less.

Thursday night - North winds 5 to 10 knots. Waves 1 to 2 feet.

Friday - Northwest winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Waves 1 to 2 feet in the morning, then 1 foot or less.

Friday night - East winds around 5 knots. Waves 1 foot or less.

Saturday - East winds 5 to 10 knots. Waves around 2 feet.

Saturday night - Southeast winds 10 to 15 knots. Waves 2 to 3 feet.
GMZ500 836 Pm Cst Mon Jan 20 2025

Synopsis for pascagoula to atchafalaya river out 60 nm -
hazardous seas and winds will be present for small craft through Wednesday morning. Northeasterly winds of 15 to 20 knots are already ongoing and will continue to buildto 25 to 35 knots with gusts upwards of 40 knots in the outer coastal waters (gale conditions) on Tuesday as surface the low moves east through the central to northern gulf. Gradual decrease of winds and seas will start Wednesday, but small craft should exercise caution through the remainder of the week.

7 Day Forecast for Marine Location Near Laplace, LA
   
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Tide / Current for Paris Road Bridge, Mississippi River Delta, Louisiana
  
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Paris Road Bridge
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Tue -- 06:54 AM CST     Sunrise
Tue -- 09:05 AM CST     -0.02 feet Low Tide
Tue -- 11:10 AM CST     Moonset
Tue -- 02:32 PM CST     Last Quarter
Tue -- 05:27 PM CST     Sunset
Tue -- 09:10 PM CST     0.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
Sorry tide depth graphs only, please select another station.

Paris Road Bridge, Mississippi River Delta, Louisiana, Tide feet
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Tide / Current for Long Point, Lake Borgne, Louisiana
  
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Long Point
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Tue -- 05:38 AM CST     -0.02 feet Low Tide
Tue -- 06:53 AM CST     Sunrise
Tue -- 11:08 AM CST     Moonset
Tue -- 02:32 PM CST     Last Quarter
Tue -- 05:26 PM CST     Sunset
Tue -- 06:30 PM CST     0.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
Sorry tide depth graphs only, please select another station.

Long Point, Lake Borgne, Louisiana, Tide feet
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Area Discussion for New Orleans/Baton Rouge, LA
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NOTE: mouseover dotted underlined text for definition
FXUS64 KLIX 210538 AFDLIX

Area Forecast Discussion National Weather Service New Orleans LA 1138 PM CST Mon Jan 20 2025

New AVIATION

SHORT TERM
(This evening through Tuesday night)
Issued at 338 PM CST Mon Jan 20 2025

...POTENTIALLY HISTORIC WINTER STORM AND DANGEROUSLY COLD WIND CHILLS WILL BEGIN TONIGHT... ALL PREPARATIONS SHOULD BE RUSHED TO COMPLETION...

KEY MESSAGES: 1. Near record-breaking snowfall is likely across portions of southeast Louisiana and coastal Mississippi. The axis of highest snowfall totals has continued to shift southward toward the I-10/12 corridor, but exact totals still remain uncertain beyond a margin of 3 to 7 inches.

2. Travel should be avoided at all costs beginning overnight tonight and continuing through Tuesday and into Wednesday due to treacherous road conditions from snow and ice after it refreezes on Wednesday morning.

3. Dangerous wind chills and hard freezes will put both people, plants, pets, and pipes in jeopardy. Wrap pipes, wear layers and cover skin from the cold air, bring pets and/or plants indoors or prepare a warm shelter, and check on friends and family, especially the elderly.

It is looking increasingly likely that the New Orleans and Baton Rouge Metro areas will see historic snowfall totals that have been not been observed since at least 1963, if not 1895. Incorporation of the highest resolution CAM guidance and trends in the NBM and suppression of surface trough due to observed drier and colder air mass could result in further adjustments southward in the axis of highest snowfall totals. At this time, it's likely that the I-10/12 corridor sees totals between 3 to 7 inches with locally higher amount targeted within the anticipated frontogenetic band of heavier snowfall rates where we have the strongest forcing for ascent. As such, it is advised to not travel on Tuesday and be prepared to shelter in place in the event roads remain too hazardous to drive due to refreezing of snow into ice on Wednesday as well. This also means we could have a sharper cut off for the highest snowfall totals, especially north of the I-12 corridor in southwest Mississippi than what is currently advertised based on current trends.

Additional alterations to this forecast package focused on transition of precipitation types on the coast occurring earlier and becoming more strictly snow Tuesday morning and increased snowfall totals for coastal Louisiana where the Winter Storm Warning was expanded to in the prior update due to the trend in a slightly more suppressed surface trough. Since there will be less time spent in transition in precip type from freezing rain to sleet to snow along coastal Louisiana tonight, it is less likely that ice accumulations will exceed 0.25" anywhere within the CWA

Anomalously dry and cold conditions continue tighten their grip across the Gulf Coast in association with a strong high pressure system providing the first shot of cold air across eastern CONUS.
This has allowed a much drier and colder air mass than even what was originally forecast to advect into the area with dew points temperatures in the single digits along and north of the I-10/12 corridor, and in the low 10s south of the lake. Behind the surface trough passage on Tuesday, another strong high pressure system will descend out of the northern Great Plains with an even stronger shot of arctic air. This in combination with the fresh snowfall covering most areas will allow temperatures to crash into the 10s to low 20s Tuesday night with wind chills in the single digits to low teens. As such, the Extreme Cold Watch has been upgraded to a Warning. This night in particular will be one of the coldest we have seen in this area in several years and will present a serious threat to people, pipes, pets, and plants. Not much reprieve is anticipated on Wednesday either as temperatures barely get above freezing, with help from higher reflectance of solar radiation from the snowpack. With another hard freeze Wednesday night, we will likely struggle to melt off the deep snowfall quickly and could see some of it last into Thursday which could present hazards for ice on roads.

LONG TERM
(Thursday through Sunday night)
Issued at 338 PM CST Mon Jan 20 2025

Another northern stream shortwave trough and an associated front will slide through the area on Thursday, but this system will be moisture starved. The end result will be an increase in northerly winds on Thursday, but with PWATS around 0.25 inches, there will be no cloud development associated with this system. Temperatures will also start off very cold with values in the teens and lower 20s as a lingering snowpack across the area allows for strong radiational cooling Wednesday night. However, some warming is expected on Thursday as the heart of the 925mb thermal trough axis starts to shift to the east. The snowpack will begin to melt, but it will take some time. With this snowpack reflecting back some of the thermal energy, temperatures will be cooler than the atmosphere would suggest with highs only warming into the low to mid 40s. This will still help melt much of the snow, but some will be left as we move into Thursday night. Thus, a refreeze is expected to take place as temperatures fall back into the 20s, and there will continue to be travel concerns, especially on elevated roadways and bridges into Friday morning.

The big melt will finally occur on Friday as a surface high becomes centered over the area and temperatures continue to gradually warm.
The combination of more bare ground and strong solar insolation will quickly melt any lingering snowpack, and this is reflected by temperatures forecast to rise closer to 50 degrees Friday afternoon.
As negative vorticity advection increases in response to a deep layer ridge axis building over the area Friday night into Saturday, mid-level temperatures will warm dramatically. A fairly sharp low level temperature inversion will develop Friday night as strong radiational cooling once again occurs, and this will push overnight lows into the upper 20s and lower 30s, but this is expected to be the final night of freezing temperatures in the extended period.
Saturday will see continued warming as strong subsidence and warming aloft continues with highs warming closer to average in the mid to upper 50s.

Saturday night through Sunday night will see the ridge axis shift to the east, and a deep layer southwesterly flow regime will develop over the area. A fast moving southern stream vorticity max will slide into the area on the back of this southwesterly flow. In advance of this system, a surge of moisture will advect into the region Saturday night with PWATS increasing by around an inch. This will be sufficient moisture to support scattered shower activity as the fast moving vort max moves through Sunday into Sunday night, and have included chance PoP of 30 to 50 percent in the forecast.
Fortunately, little in the way of instability will be in place due to weak mid-level lapse rates. Have opted to not include a mention of thunderstorms in the forecast for Sunday. Warm air advection will also occur over this time period with highs climbing into the 60s and even lower 70s Sunday afternoon. Lows will be near average Saturday night, and should rise to above average levels on Sunday night. PG

AVIATION
(06Z TAFS)
Issued at 1134 PM CST Mon Jan 20 2025

A mix of very light sleet and rain has been reported over the past couple of hours as moisture continues to build down from aloft.
Temperatures are above freezing still, so no accumulation on surfaces has started yet. However, as the temperature drops and humidity increases after 09z, more snow will begin to develop at the terminals. The snow will turn intense after 12z with periods of heavier snow occurring between 15z and 22z. After 22z, drier air will begin to push in from the northwest and improving conditions are expected to develop between 22z and 00z at BTR and HDC and between 00z and 03z at HUM, MSY, HDC, NEW, ASD, and GPT.
All snow should end by 03z with a return to VFR conditions at all of the terminals by 06z. Winds will remain gusty from the north at all of the terminals as the low pressure system producing the snow passes to the south. PG

AVIATION
(00Z TAFS)
Issued at 530 PM CST Mon Jan 20 2025

VFR conditions will continue through around 09z, but conditions will begin to degrade after 09z as a band of light to moderate snow starts to develop at the terminals. At HUM, the precipitation will be a mix of sleet and snow between 09z and 14z. After 14z, a band of heavier snow is expected to develop over the terminals and then persist through around 22z to 00z. Snow will reduce visibilities to IFR or lower from 15z through 22z. The snow will begin to ease after 00z with only some flurries lingering at MSY, NEW, HUM, and GPT through 06z. North winds will also be strong with frequent gusts over 20 knots at all of the terminals. PG

MARINE
Issued at 338 PM CST Mon Jan 20 2025

Hazardous seas and winds will be present for small crafts through Wednesday morning. Northeasterly winds of 15 to 20 knots are already ongoing and will continue to buildto 25 to 35 knots with gusts upwards of 40 knots in the outer coastal waters (gale conditions) on Tuesday as surface the low moves east through the central to northern gulf. Gradual decrease of winds and seas will start Wednesday, but small crafts should exercise caution through the remainder of the week.

PRELIMINARY POINT TEMPS/POPS
MCB 21 30 12 39 / 50 80 0 0 BTR 26 33 15 39 / 70 90 0 0 ASD 25 33 17 41 / 50 90 10 0 MSY 28 34 24 37 / 50 100 20 0 GPT 25 32 17 39 / 40 90 20 0 PQL 25 36 18 42 / 40 90 30 0

LIX WATCHES/WARNINGS/ADVISORIES
LA...Cold Weather Advisory until 6 PM CST Tuesday for LAZ034>037-039- 046>048-056>060-064>071-076>090.

Winter Storm Warning until midnight CST Tuesday night for LAZ034>037-039-046>048-056>060-064>071-076>090.

Extreme Cold Warning from 6 PM Tuesday to 9 AM CST Wednesday for LAZ034>037-039-046>048-056>060-064>071-076>090.

GM...Small Craft Advisory until midnight CST Tuesday night for GMZ530- 532-534-536-538-557.

Small Craft Advisory until 6 AM CST Tuesday for GMZ550-552-555- 570-572-575-577.

Gale Warning from 6 AM Tuesday to midnight CST Tuesday night for GMZ550-552-555-570-572-575-577.

MS...Cold Weather Advisory until 6 PM CST Tuesday for MSZ068>071-077- 083>088.

Winter Storm Warning until midnight CST Tuesday night for MSZ068>071-077-083>088.

Extreme Cold Warning from 6 PM Tuesday to 9 AM CST Wednesday for MSZ068>071-077-083>088.

GM...Small Craft Advisory until midnight CST Tuesday night for GMZ532- 534-536-538-557.

Small Craft Advisory until 6 AM CST Tuesday for GMZ552-555-570- 572-575-577.

Gale Warning from 6 AM Tuesday to midnight CST Tuesday night for GMZ552-555-570-572-575-577.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
NWCL1 - 8761927 - New Canal, LA 15 mi83 minNE 14G18 37°F 53°F30.52
CARL1 19 mi83 min 44°F
BYGL1 - 8762482 - Bayou Gauche, LA 27 mi83 min 37°F 48°F30.52
SHBL1 - 8761305 - Shell Beach, LA 41 mi83 minNNE 19G21 37°F 40°F30.49


Wind History for New Canal Station, LA
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Airport Reports
   
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Weather Map
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GEOS Local Image of Southern Mississippi Valley  
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New Orleans/Baton Rouge, LA,





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