Mississippi Sound GMZ532 Marine Forecast
|Today...North Winds 20 Knots. Waves 2 To 4 Feet.|
|Tonight...Northeast Winds 10 To 15 Knots. Waves 1 To 2 Feet.|
|Friday...East Winds 10 To 15 Knots. Waves 1 To 2 Feet.|
|Friday Night...Southeast Winds 5 To 10 Knots. Waves 1 Foot Or Less.|
|Saturday...Southeast Winds 10 To 15 Knots. Waves 1 To 2 Feet.|
|Saturday Night...Southwest Winds 10 To 15 Knots. Waves 2 To 4 Feet. Chance Of Showers.|
|Sunday...West Winds 10 To 15 Knots. Waves 2 To 4 Feet. Dominant Period 4 Seconds. Chance Of Showers In The Morning.|
|Sunday Night...Northwest Winds 15 To 20 Knots. Waves 3 To 5 Feet. Dominant Period 4 Seconds.|
|Monday...Northwest Winds 15 To 20 Knots. Waves 3 To 5 Feet. Dominant Period 4 Seconds.|
|Monday Night...North Winds 15 To 20 Knots. Waves 2 To 4 Feet. Dominant Period 4 Seconds.|
| Synopsis for Pascagoula to SW Pass Mississippi - GMZ501|
Synopsis for SW Pass Mississippi River to Atchafalaya River- GMZ500
931 PM CST Wed Jan 27 2021
Strong high pressure with much colder air will build over the waters tonight and remain in place through Friday before moving east over the weekend. Another cold front is expected to move through the central Gulf coast region on Sunday.
| Area Forecast Discussion|
National Weather Service New Orleans LA
1141pm CST Wednesday Jan 27 2021
SHORT TERM (Tonight through Saturday)... Surface high pressure with colder and drier air will build into the central Gulf coast region tonight through Friday along with brisk north winds. Skies already mostly cleared out nicely this afternoon, but some low level clouds may develop back into some northern/inland areas tonight. The strong cold air advection should bring low temperatures tonight down to mostly mid 30s along/north of the I-10/12 corridor with upper 30s to the lower 40s south. Any increased cloud areas should clear out fairly early on Thursday, but it will remain rather cool with highs only reaching the mid 50s. Another light freeze, still what should be fairly common this time of year, is expected Thursday night across southwest Mississippi into the usual colder portions of the northshore of Lake Pontchartrain into inland coastal Mississippi. Most other locations should see lows in the mid 30s to lower 40s. Friday will remain mostly sunny and dry with surface high pressure in place. A mid/upper ridge will move east across the central states towards the Mississippi valley. This will allow temperatures to rebound closer to normal with highs mostly around 60.
The mid/upper level shortwave ridge axis will move east into the eastern U.S. Saturday and a potent shortwave trough will move out of the Rockies into the central Plains region. The strong surface low associated with this system will cause southerly winds to increase in our region, and there may be enough moisture return and isentropic lift for a few showers to develop late in the afternoon across far northwest portions of the forecast area. Temperatures will continue the warming trend. Rain chances will then go up to 40 to 70 percent Saturday night as a cold front approaches and the tail end of a shortwave trough passes through. At this point, it appears there will be no thunderstorms but just showers with generally light rainfall amounts.
Long Term - Sunday through Wednesday
The upper pattern will amplify Sunday with a deepening mid/upper level trough traversing east of the Mississippi River while a ridge builds over western states. The cold front will push through the forecast area on Sunday, so at this point it looks like the main chance of rain will be in the morning with clearing skies in the afternoon. Much cooler air will move back into the region at some point later on Sunday or Sunday night then dry and cooler conditions are expected for the start of next week. The next significant system at this point looks to be late in the week beyond this forecast period.
Winds behind the cold front will continue to pick up to near or exceeding 20 knots during the late afternoon to early evening hours tonight, especially in gusts as colder air and strong high pressure build into the central Gulf coast region. These conditions will continue through Thursday early to mid morning across tidal lakes and sounds and through midday across most open coastal waters. Winds and seas will gradually subside Thursday afternoon through Friday, but that improvement will be short-lived as southerly winds will pick up to 15 to 20 knots Saturday as high pressure moves east and a strong low pressure area develops in the southern Plains. These winds and associated seas will remain elevated going through the weekend and behind another fairly strong cold front that is expected to move through on Sunday.
NOAA New Orleans LA Office: Watches - Warnings - Advisories
LA...None. GM...Small Craft Advisory until noon CST Thursday for GMZ550-552-555- 557-570-572-575-577.
Small Craft Advisory until 9am CST Thursday for GMZ532-534-536- 538.
Small Craft Advisory until 6am CST Thursday for GMZ530.
MS...None. GM...Small Craft Advisory until noon CST Thursday for GMZ552-555-557- 570-572-575-577.
Small Craft Advisory until 9am CST Thursday for GMZ534-536-538.