Dearborn, MI
http://www.youtube.com/watch?v=nVMETtY6LNI
Man i wish our sirens went off for Snow Emergencies...i would have heard them 3-4 times this winter. I still think its crazy they do this...
EDIT: Here is a video that has a ton of different whelens going off in Hilo in Dearborn, MI
http://www.youtube.com/watch?v=lIUGN4rq ... re=related