Marshall County, AL siren map:
https://maps.google.com/maps/ms?msid=21 ... 1dfe&msa=0
I've found most of the sirens is Marshall County, but I'm pretty sure I'm missing several locations for Guntersville, Albertsville, and Boaz.
Blount County, AL siren map:
https://maps.google.com/maps/ms?msid=21 ... b90a&msa=0
I'm pretty sure I'm missing quite a few locations for Blount County because I haven't been able to find any siren in Oneota and Bountsville.
Arab, AL siren map:
https://maps.google.com/maps/ms?msid=21 ... f0a6&msa=0