Marine Weather Net

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


REST OF TODAY

E
WINDS
25
KNOTS

TONIGHT

SE
WINDS
20 - 25
KNOTS

THURSDAY

S
WINDS
20 - 25
KNOTS

THURSDAY NIGHT

SE
WINDS
15 - 20
KNOTS

The Marine Weather Forecast In Detail:
GMZ570 Forecast Issued: 934 AM CST Wed Dec 02 2020

SMALL CRAFT EXERCISE CAUTION IN EFFECT UNTIL NOON CST TODAY ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THURSDAY AFTERNOON...
Rest Of Today...East Winds 25 To 30 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 4 Seconds.
Tonight...Southeast Winds 20 To 25 Knots. Seas 5 To 8 Feet With Occasional Seas To 10 Feet. Dominant Period 4 Seconds. Chance Of Showers Through The Night.
Thursday...South Winds 20 To 25 Knots. Seas 5 To 8 Feet With Occasional Seas To 10 Feet. Dominant Period 4 Seconds. Chance Of Showers In The Morning. Slight Chance Of Thunderstorms Through The Day. Showers Likely In The Afternoon.
Thursday Night...Southeast Winds 15 To 20 Knots Becoming Northwest In The Late Evening. Seas 5 To 8 Feet With Occasional Seas To 10 Feet. Dominant Period 4 Seconds. Showers Likely In The Evening, Then Chance Of Showers After Midnight.
Friday...Northwest Winds 15 To 20 Knots. Seas 4 To 7 Feet With Occasional Seas To 9 Feet. Dominant Period 4 Seconds. Slight Chance Of Showers Through The Day.
Friday Night...North Winds 15 To 20 Knots. Seas 4 To 7 Feet With Occasional Seas To 9 Feet. Dominant Period 4 Seconds.
Saturday...Northwest Winds 15 To 20 Knots. Seas 3 To 6 Feet With Occasional Seas To 8 Feet. Dominant Period 4 Seconds.
Saturday Night...Northwest Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet. Dominant Period 4 Seconds.
Sunday...Northwest Winds 10 To 15 Knots. Seas 3 To 5 Feet.
Sunday Night...Northwest Winds Near 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet.
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Synopsis for Pascagoula to SW Pass Mississippi - GMZ501
Synopsis for SW Pass Mississippi River to Atchafalaya River- GMZ500
934 AM CST Wed Dec 2 2020

High pressure currently over the north gulf will push eastward tonight. A strong east...southeasterly flow will follow suit bringing small craft advisory conditions to the open gulf waters today and tonight. Another cold front will move through the central gulf coast Thursday night bringing a strong offshore flow back to coastal waters. This could easily extend the Small craft advisory conditions well into Friday.
Area Forecast Discussion
National Weather Service New Orleans LA
534am CST Wednesday Dec 2 2020

Short Term
A return to near normal temperatures today with dry conditions continuing as upper level and surface ridge briefly hold in place out ahead of a massive closed low that is slowly spinning over the panhandle of Texas. Negatively tilted associated upper level trough will eventually drag its way eastward through Oklahoma on Thursday bringing a slow moving cold front towards central Louisiana. This will bring an increased chance of showers and possibly a few thunderstorms on Thursday. Cold front will push through on Thursday night bringing another round of below normal temperatures with highs only rebounding into the 50s on Friday. No freezing temperatures expected this round with lows holding in the mid to upper 30s Friday night in the typically cooler forecast locations. Trough will swing through Arkansas and Tennessee Friday eventually lifting into the mid Atlantic states by the weekend. As a result a dry conditions with a slow warming trend will result by Saturday afternoon.

.LONG TERM (Saturday thru Wednesday)... The extended period will be a dry one with some continuation of continental air mass re-enforcement on amplifying trough pattern across the eastern U.S. A strong surge of cold air arrives Monday as the base of the trough swings through the Appalachians. Upper level ridge spline moves over the western to central Gulf States by Tuesday to align with surface high pressure to maintain strong subsidence dryness through middle of next week. Temperatures should remain on the cooler side of normal for the duration but above freeze concerns, though most mornings should still reach the mid to upper 30s in interior locations.

Marine
Small craft advisories for the coastal waters will remain in place through at least Thursdayam as a strong onshore flow takes hold by this afternoon out ahead of the next strong dynamical cool season baroclinic system. Strong offshore flow will take hold by late Thursday night and continue into Friday as cold advection as well as gradient wind will pickup in full force. Small Craft advisory conditions likely Marine-wide for the period. Offshore flow continues through early next week but should slacken by Saturday.

NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...None. GM...Small Craft Advisory from noon today to 6am CST Thursday for GMZ532-536-538-550-552-555-557-570-572-575-577.

MS...None. GM...Small Craft Advisory from noon today to 6am CST Thursday for GMZ536-538-550-552-555-557-570-572-575-577.