Major Hurricane Roslyn is heading for the west coast of Mexico and is expected to roar ashore at or near Category 3 strength somewhere in the states of Jalisco or Nayarit late Saturday or early Sunday. The National Hurricane Center warns that “preparations … should be rushed to completion” for those within Roslyn’s path, the agency sounding the alarm for expected “damaging winds, a dangerous storm surge … [and] heavy rainfall [that] could lead to flash flooding and mudslides.”