( CNN ) -- NEW : Louisiana parish plans to place sand bags along levee . Debby is the fourth named storm of the Atlantic hurricane season . The National Weather Service says a new tropical depression will form in the Gulf of Mexico on Monday and move into the eastern Caribbean Sea by Tuesday. Evacuations ordered on Gulf oil platforms , rig .
NEW : Louisiana parish plans to place sand bags along levee . Debby is the fourth named storm of the Atlantic hurricane season . The National Weather Service says a new tropical depression will form in the Gulf of Mexico on Monday and move into the eastern Caribbean Sea by Tuesday. Evacuations ordered on Gulf oil platforms , rig .