Hurricane John
Hurricane John was the longest-lived tropical cyclone ever observed. It formed in the eastern Pacific Ocean in 1994 several hundred miles west of Mexico. John then tracked all the way across the Eastern and Central Pacific hurricane basins, crossed the International Date Line, becoming Typhoon John. It then curved north through the Western Pacific and came back across the Date Line (and thus becoming Hurricane John again) and died in the North Central Pacific about a thousand miles south of Unalaska Island. John spent an unprecedented 31 days at sea.