Video 1:
http://www.youtube.com/watch?v=LGGakY33eAc
Video 2:
http://www.youtube.com/watch?v=8VQvdZ6kfJo
This has been a very intense night. At least two unconfirmed tornadoes in the Siloam Springs area alone, where I live. The entire Siloam Springs, Arkansas tornado siren system consists of 8x American Signal Corporation Tempest T-128's. One of which is located about four blocks away from my residence.
High resolution photos of the sirens and their unplugged brothers (Federal Signal Corporation Thunderbolt 1000/1000T's) can be found at my deviantart account:
http://coyoteunknown.deviantart.com
Later on the sirens sounded again, while police officers drove down every street with their lights flashing urging citizens to take shelter. At that point I kind of freaked out, as Jonesboro, Arkansas's officers never did that. So I honestly thought something was going on when the police were patrolling like that. *laughs*
Update: Video 2 added. Learned that Siloam Springs uses the "Alert" signal for tornado warnings. They do not use the "Attack" signal except during scheduled testing.
Final Update: There were four confirmed tornadoes in Benton county. All were rated EF0 and no injuries were reported.