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 the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM. * Until 745 AM CDT. * At 612 AM CDT, a severe thunderstorm capable of producing waterspouts was located 8 nm west of Southwest Pass Of the Mississippi River, moving northeast at 10 knots. HAZARD. Waterspouts, wind gusts 34 knots or greater, and small hail. SOURCE. Radar. IMPACT. Waterspouts can quickly form and capsize boats. damage vessels and oil rigs. and create suddenly higher waves. Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include. Pilottown and Southwest Pass Of the Mississippi River.