Marine Weather Net

Southwest Pass of the Mississippi River to Port Fourchon, LA 20 - 60 NM Marine Forecast


TONIGHT

E
WINDS
15
KNOTS

TUESDAY

E
WINDS
15 - 20
KNOTS

TUESDAY NIGHT

SE
WINDS
15 - 20
KNOTS

WEDNESDAY

SE
WINDS
15 - 20
KNOTS

The Marine Weather Forecast In Detail:
GMZ572 Forecast Issued: 334 PM CST Mon Mar 08 2021

Tonight...East Winds Near 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet. Dominant Period 7 Seconds.
Tuesday...East Winds 15 To 20 Knots. Seas 3 To 6 Feet. Dominant Period 7 Seconds.
Tuesday Night...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 7 Seconds.
Wednesday...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 8 Seconds.
Wednesday Night...Southeast Winds 15 To 20 Knots. Seas 4 To 7 Feet With Occasional Seas To 9 Feet. Dominant Period 8 Seconds.
Thursday...Southeast Winds 15 To 20 Knots. Seas 4 To 7 Feet With Occasional Seas To 9 Feet. Dominant Period 8 Seconds.
Thursday Night...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 8 Seconds.
Friday...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 8 Seconds.
Friday Night...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 8 Seconds.
Saturday...Southeast Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 7 Seconds.
Saturday Night...Southeast Winds Near 15 Knots. Seas 3 To 6 Feet. Dominant Period 7 Seconds.
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Synopsis for Pascagoula to SW Pass Mississippi - GMZ501
Synopsis for SW Pass Mississippi River to Atchafalaya River- GMZ500
334 PM CST Mon Mar 8 2021

High pressure over the coastal waters will gradually shift eastward through the week.
Area Forecast Discussion
National Weather Service New Orleans LA
339pm CST Monday Mar 8 2021

Tonight, upper level ridging begins to build over our area, helping to enhance the stable air in the environment. Easterly surface winds will help to introduce some limited moisture into the area. As a result, overnight low temperatures will be a bit more moderate Tuesday morning when compared with previous morning. Clear sky conditions will still allow for some cooling though and as a result, low temperatures in the forecast were bumped down below the NBM guidance, but near operational and ensemble model guidance, with forecasted low temperatures in the low to mid 40s for much of the area Tuesday morning.

Tuesday through Friday morning, upper level ridging will dominate the area thanks to a high pressure system in the Gulf of Mexico. Surface winds will be primarily southerly to southeasterly, which will enhance the moisture and warm air advection into the area. As a result, high temperatures were bumped up above NBM guidance for Thursday, Friday, and Saturday since these conditions will be favorable to exceed guidance. It is worth noting that the forecasted temperatures are more in line with the operational models as well.

Friday and Saturday, the ridging and Gulf high pressure begin to weaken for our area. Southerly and southeasterly surface winds will still be persistent through the weekend, continuing to enhance the moisture and warm air advection into the area. This also helps to increase some instability in the environment as the ridge weakens. As a result, some light showers will be possible, mainly during the daytime heating hours on Friday and Saturday.

Sunday into Monday, an upper level trough is expected to move through the area, enhancing rain chances for the region. Moderate to heavy rainfall will be possible with this system. A thunderstorm or two will also be possible. The strength and timing of this system is highly uncertain right now, with some models in disagreement over whether the system will slow down and arrive a day or two later. It will depend on how it develops over the next week. MSW

Marine
Winds will be easterly and moderate (<15 knots) through Wednesday morning. Winds will be strong (15-20 knots) and southeasterly Wednesday through Friday morning. Winds will be southerly to southeasterly and moderate (<15 knots) Friday through Monday morning. Wave heigheights will correspond with the wind speeds. MSW

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...None. GM...None. MS...None. GM...None.