Jul 22, 2013 7:51 PM by Katie Ferber, KSBY News
If you live in San Luis Obispo County and you hear a strange siren in the distance, don't worry it's all a test.
It's time for San Luis Obispo County's quarterly growl test of the early warning system.
Sirens will run for about 20 seconds Tuesday and Wednesday, between 7 a.m. and 6 p.m.
In the event of an actual emergency the alarms will sound much louder, and go on for several minutes.
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