

Here's a scan of the article in today's Los Angeles Daily News: (If the image won't come up, see below where I transcribed the highlights)

The Peter Pitchess Jail is located in Hasley Canyon, just North of Santa Clarita and Hwy 126. They said that this test was of seven sirens, including one new siren just installed in the new Te' Soro subdivision, blared Wednesday at 10:00 AM for this test. The purpose of the system is to warn neighbors of escaped inmates. The article does not state whether there will be any future test schedule.
Now my curiosity is killing me, and I think my Sunday motorcycle ride will be to locate, ID, and photograph those sirens...
Charles