An emergency preparedness alert notification system includes a central siren control system (CSCS) (102) remotely located from a multiplicity of rotating siren systems (104, 106, 108) distributed over diverse wide geographic regions, and which can be automatically tested by the CSCS. The testing method can be automatically repeated to accurately and timely capture test result data, and alarm conditions, from each of the multiplicity of remotely located at least one rotating siren system. Individual components of each rotating siren system are diagnosed and the test results, including any alarm conditions, can be automatically reported via wirelessly transmitted messages 702 to the CSCS. Technical and repair personnel can be dispatched to a particular siren site based on the automatic testing results reported at the CSCS. The retrofittable system can predict a future occurrence of a failure of a particular component of a rotating siren system.