By JAY REEVES and BRENDAN FARRINGTON, Associated Press Supercharged by abnormally warm waters in the Gulf of Mexico, Hurricane Michael slammed into the Florida Panhandle on Wednesday with potentially catastrophic winds of 155 mph, one of the most powerful storms ever to hit the U.S. mainland. Michael blew ashore near Mexico Beach, a tourist town about midway along the Panhandle, a lightly populated,