Orlando Sentinel: Florida is mired in the worst drought the state has experienced since the 1950s, with state officials warily looking ahead to May as a make-or-break month, said State Meteorologist Ben Nelson. "May is going to be really critical as to when that summer thunderstorm pattern begins," Nelson said Tuesday, during a daylong summit of Florida emergency managers, forestry officials and water managers in Tallahassee. "That will be critical in determining whether the …