Tropical Storm Nana forms in Caribbean Sea, Tropical Storm Omar forms off North Carolina coast The Citizen 5 years ago Tropical Depression 15 became Omar just before 5 p.m. on Tuesday. Source: ABC News 6 Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on LinkedIn (Opens in new window) LinkedIn Click to print (Opens in new window) Print Tropical Storm Rene forms in Atlantic hours after Tropical Storm PauletteDateSeptember 7, 2020In relation toRobesoniaTropical depression forms off NC coast, expected to become Tropical Storm BillDateJune 14, 2021In relation toRobesoniaTropical Storm Erin forms in Eastern Tropical Atlantic, NHC watches 2 other areasDateAugust 11, 2025In relation toRobesonia