SMWLIX The National Weather Service in New Orleans has issued a * Special Marine Warning for. Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm. Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm. Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM. Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM. * Until 115 PM CDT. * At 1209 PM CDT, a severe thunderstorm capable of producing dangerously strong winds or a waterspout was located near Southwest Pass Of the Mississippi River, moving east at 20 knots. HAZARD. Waterspouts, wind gusts in excess of 65 knots, and small hail. SOURCE. Radar. IMPACT. Waterspouts can quickly form and capsize boats. damage vessels and oil rigs. and create suddenly higher waves. Expect wind gusts in excess of 65 knots and suddenly higher waves. Boats could sustain catastrophic damage in high winds or even capsize. * Locations impacted include. Pilottown and Southwest Pass Of the Mississippi River.