Siren test in moore oklahoma.

so any of you siren fans that have watched my last video may have noticed that this thunderbolt siren wasn't sounding, in fact I didn't see it up on the training tower at the fire house either.... guess in Leu of the severe weather season approaching they put it back up. Notice the pitch change too... maybe a speed issue with the chopper motor?
** EDIT**** I just noticed this was exactly 1 month before the tornado hit here in Moore. This thing helped alert and save people that didn't know of the massive EF5