By Brian Ellsworth MIAMI (Reuters) – Hurricane Nicole weakened into a tropical storm on Thursday shortly after making landfall on Florida’s east coast, barreling ashore with a brew of heavy downpours and fierce winds. Some 345,000 homes and businesses across Florida were without power on Thursday, after the storm, packing winds of 75 miles per hour (120 km per hour), made landfall at 3 a.m. EST (0800 GMT) along the east coast north of Miami as a hurricane, the National Hurricane Center said. “We’re ready and resources are available for the post-storm needs,” said Florida Governor Ron DeSantis …