Weather authorities maintain separate annual name lists for hurricanes in the Atlantic basin and the Eastern North Pacific. Bill Rooke of Pasadena imagines an Atlantic hurricane crossing Mexico and emerging in the Pacific and asks, "Would this get a new Pacific name?" In 1996, Tropical Storm Cesar crossed from the Caribbean to the Pacific and became TS Douglas. After that, the rules changed. Now, if a storm maintains tropical storm strength, it keeps its birth name.