I did not record this, but this was the FIRST time I heard our sirens used for an acutal tornado warning.
I was outside with my neighbors & we noted how it was kinda wierd, we didn't know there was a storm or a tornado until the sirens sounded.
There were two, one south of us (Brookings) & one north of us.
Enjoy.
Byron S. Rieckman
http://www.youtube.com/watch?v=PmV0oNaCJfs
+ I found a vid of the Spencer Tornado SD
http://www.youtube.com/watch?v=7pHiUJNoThQ