Marine Weather Net

Port Fourchon, LA to Lower Atchafalaya River, LA out 20 - 60 NM Marine Forecast


REST OF TODAY

E
WINDS
5 - 10
KNOTS

TONIGHT

SE
WINDS
5 - 10
KNOTS

WEDNESDAY

SE
WINDS
5 - 10
KNOTS

WEDNESDAY NIGHT

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
GMZ570 Forecast Issued: 1154 AM CDT Tue Jul 27 2021

Rest Of Today...East Winds 5 To 10 Knots. Seas 1 To 2 Feet. Dominant Period 4 Seconds. Slight Chance Of Showers And Thunderstorms Late In The Afternoon.
Tonight...Southeast Winds 5 To 10 Knots. Seas 1 To 2 Feet. Dominant Period 4 Seconds. Slight Chance Of Showers And Thunderstorms.
Wednesday...Southeast Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 4 Seconds. Showers And Thunderstorms Likely In The Morning, Then Chance Of Showers And Thunderstorms In The Afternoon.
Wednesday Night...South Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 4 Seconds. Chance Of Showers And Thunderstorms After Midnight.
Thursday...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 5 Seconds. Chance Of Showers And Thunderstorms.
Thursday Night...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 5 Seconds. Slight Chance Of Showers And Thunderstorms After Midnight.
Friday...West Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 4 Seconds. Chance Of Showers And Thunderstorms Through The Day.
Friday Night...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 4 Seconds. Slight Chance Of Showers And Thunderstorms After Midnight.
Saturday...West Winds 5 To 10 Knots. Seas 1 Foot Or Less. Dominant Period 4 Seconds. Chance Of Showers And Thunderstorms Through The Day.
Saturday Night...Southwest Winds 5 To 10 Knots. Seas 1 To 2 Feet. Dominant Period 4 Seconds. Slight Chance Of Showers And Thunderstorms After Midnight.
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Synopsis for Pascagoula to SW Pass Mississippi - GMZ501
Synopsis for SW Pass Mississippi River to Atchafalaya River- GMZ500
1154 AM CDT Tue Jul 27 2021

High pressure will remain centered over the Southern Plains. A weak front will move toward the Gulf coast Tuesday. The front should then stall along or just inland for the remainder of next week.
Area Forecast Discussion
National Weather Service New Orleans LA
1229pm CDT Tuesday July 27 2021

Short Term - Today Through Thursday
mid air, warm temperatures, and light winds will keep the current heat advisory posted through today. The main hope for cooling will be any thunderstorm development which will be embedded in a deep easterly flow. Afternoon seabreeze should provide a little relief for at least the coast. These conditions should play out each day much the same way with a slow increase in precipitation numbers each day.

LONG TERM (Thursday night and beyond)...Main forecast concerns during the extended period will continue to be the daily threat of thunderstorms, if any, and oppressive heat conditions. Medium range solutions show the upper ridge over Kansas/Oklahoma Thursday night and keep it there through Friday before weakening it as it drifts westward. This ridge will extend southeastward into our area and it looks like convection may be suppressed southward, at least for Friday and Saturday. Wouldn't be surprised if guidance continues a downward trend in PoPs. Beyond Saturday, eastern US longwave trough begins to deepen again and this could push a "backdoor" frontal boundary toward us for Sunday into early next week. This would put the highest rain chances in eastern portions of the area. Have trended a bit below NBM Probability of Precipitation for now.

Will continue trending high temperatures above much of the guidance with an edge toward the NBM/ECMWF (European Centre for Medium-Range Weather Forecasts) solutions. 35

AVIATION... Little in the way of TSRA will be around for most terminals. Terminals with the best chance of having a TS or atleast VCTS will be KBTR and KMCB today.

Marine Discussion
Almost normal marine conditions to continue and the calendar shows why. July/August, the typical conditions over the gulf coastal waters is very light to no wind outside of any system/showers/thunderstorms moving through. It is the time of year the Doldrums actually become quite established and with no showers or thunderstorms around, the water can become so calm that it can look and act like a mirror. This can act to give a person full exposure to sunburn and heat exhaustion more rapidly than normal as no air movement and very little shade protection can cause a build up of heat that can't be depleted easily.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...Heat Advisory until 7pm CDT this evening for LAZ034>037-039- 046>050-056>061-063>065-071-072-075>078.

GM...None. MS...Heat Advisory until 7pm CDT this evening for MSZ068>071-077-080.

GM...None.