The National Weather Service has issued a Special Marine Warning for the following Gulf of Mexico and along the U.S. Gulf Coast from the Mexican border to Ocean Reef, FL counties: Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM, Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM. Effective until May 07, 11:18 AM EDT HZNCBL