Civil emergency test in Miles City, MT

[ver tum]

This video features a NOAA All Hazzard Radio broadcast, EAS tones, test message, and a siren that I'm pretty sure is an STH-10 sounding the Alert signal. I'm visually impaired, so I can't see the siren, so please correct me if I'm wrong.
http://youtube.com/watch?v=W_o_WfzEMqY

Very long wind-down at the end.

[EL1998P71]

Nice clip, Took a long time to load, worth the wait.

[ver tum]

Is that an STH-10?

[kswx29]

Is that an STH-10?

Yes.

[Daniel]

I believe that it is Miles City that has the STH-10 and that weird, three-siren cluster on the roof of the county courthouse. No one has yet identified it.