It looks like the city of San Angelo Tx has updated their Emergency
Management page with a map and location list of their sirens.
Most of them are Allertors, but there are a few thunderbolts, P-50's SD-10's, and i think a few P-10/15
There are some newer T-128's and i saw one ASC E-class or ATI speaker Array's
when we were driving through the city.
I've been there a few times and their sirens are mounted LOW!
My brother saw an Allertor that must have been at least 20 feet off the ground by a Stripes gas station.
Some Allertors are pretty close to houses, and a few thunderbolt almost seem to be
in peoples backyards.
Any way here is a video they released.
https://www.youtube.com/watch?v=ls_potTdJ48
Here is their .PDF from their website that includes street addresses, old and new maps!
http://www.cosatx.us/home/showdocument?id=162