Ann Arbor’s siren system is tested at 1pm the second Tuesday of every month March through November. There are 22 sirens throughout the city limits.
The City of Ann Arbor siren outdoor warning system test will be conducted today, Tuesday, July 9 at 1 p.m. The city has 22 siren…
— City of Ann Arbor (@A2GOV) July 9, 2013