Port Fourchon, LA to Lower Atchafalaya River, LA out 20 - 60 NM Marine Forecast
| Tonight...South Winds Around 10 Knots. Seas Around 3 Feet. Wave Detail: South 3 Feet At 6 Seconds. |
| Tuesday...Southwest Winds 5 To 10 Knots. Seas 2 To 3 Feet. Wave Detail: South 3 Feet At 6 Seconds. |
| Tuesday Night...Southwest Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 6 Seconds. |
| Wednesday...West Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 6 Seconds. |
| Wednesday Night...Southwest Winds 5 To 10 Knots. Seas 1 Foot Or Less. Wave Detail: Southwest 1 Foot At 2 Seconds And South 1 Foot At 5 Seconds. |
| Thursday...Southwest Winds Around 5 Knots. Seas 1 Foot Or Less. Wave Detail: South 1 Foot At 5 Seconds. |
| Thursday Night...South Winds 5 To 10 Knots. Seas 1 Foot Or Less, Then Around 2 Feet After Midnight. Wave Detail: South 1 Foot At 4 Seconds, Becoming Southeast 1 Foot At 4 Seconds. |
| Friday...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 4 Seconds. |
| Friday Night...South Winds 5 To 10 Knots, Increasing To 10 To 15 Knots After Midnight. Seas Around 2 Feet. Wave Detail: South 2 Feet At 5 Seconds. |
| Saturday...South Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: South 2 Feet At 5 Seconds. |
| Saturday Night...South Winds 10 To 15 Knots. Seas 2 To 3 Feet. |
| Area Forecast Discussion National Weather Service New Orleans LA 1209am CDT Tuesday Jun 23 2026 .SHORT TERM... (Now through Wednesday night) Issued at 1058pm CDT Monday Jun 22 2026 Storms remain quite strong over northern LA through central MS this morning. These storms are following a frontal axis oriented NW to SE. The high pressure to the south of this line is also quite supressive right up to where the frontal boundary is able to weaken the environment enough to get storms going. The front is still moving ever so slowly to the south this morning which means this line, where storms a forming, will be a bit farther south by Wed. First, we will start with today. This line should be located from Shreveport to Slidell by noon today. Models show this fairly well and this should lead to somewhat of a precipitation gradient with higher numbers along and north of this line. The current set of storms moving SE this morning should start to run into a more stable environment around sunrise as they approach causing them to begin decaying. But they will help set the stage for more storms to developing thorugh the day. These will all be moving SE at around 10 mph so they won't be hanging around for several hours. But they will still contain very heavy rainfall and with areas still trying to dry out, they could cause some isolated flooding issues in places that were hit the hardest during the tropical rainfalls. This line will move slightly more southward and should follow along the Red River southeast to and along the Miss River by Wed. Not many storms with this system are expected to become severe, but an isolated storm or two could become strong to severe during this Tuesday through Wednesday time frame. The storms that are capable of becoming strong/severe will be capable of producing hail and straight line winds being the main hazards. Areas south of this line will have ample heating and a heat advisory has been issued for areas where there is plenty of moisture getting trapped at the surface coupled with this heating. Long Term (Thursdsay through Monday) Issued at 1058pm CDT Monday Jun 22 2026 Thursday into Friday brings zonal flow to the area with a ridge to the north building in over the weekend. This brings classic summertime weather with afternoon thunderstorms predominating the pattern. Concurrently, a strong upper level ridge will be sweeping eastward and by Sunday morning will be centered to our north extending into southcentral Canada. A strong low will be spinning over the northern Rockies and beginning Monday will ride up over the ridge and compress it laterally; more to come on this feature and its impacts in future discussions. [Schlotz] Marine Issued at 1058pm CDT Monday Jun 22 2026 A surface high is currently centered in the eastern Gulf which is leading to southwesterly flow over the local marine zones. As an upper level trough digs into the southeastern US, the center of that high pressure will be driven west and into the north/central Gulf. That will put it right near the local area which will substantially decrease winds. So expect lighter and more variable winds today and Wednesday. As the trough lifts and tracks east, the high's center then tracks back east which brings our winds back to southwest and closer to 10 to 15 knots and seas of 2 to 4 feet. NOAA New Orleans LA Office: Watches - Warnings - Advisories LA... Heat Advisory from 10am to 8pm CDT Tuesday for LAZ058-064- 076>078-080-082-084-087-098-099. GM...None. MS...None. GM...None. |
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