MTSU safety officials will conduct a tornado alert drill, starting at 11:15 a.m. Wednesday, March 11. A siren will sound on campus, followed by an audible announcement. Another audible announcement will signify an “all clear” at 11:30 a.m. Emergency tornado “test” messages will be sent via text message and e-mail to all students and staff who have signed up for the emergency text-messaging service.