When a tornado watch or warning is issued, outdoor sirens across Milwaukee County signal the potential danger.

While tornado sirens and weather alerts are triggered by the same warning, they're two separate systems.

Whether an alert comes from an outdoor siren or a cellphone, it starts with information from the National Weather Service.

The Sirens are the centerpiece for what’s expected to be another historic night at the World’s Most Famous Arena on Saturday ...

During severe weather, sirens will sound for tornado warnings, storms with winds over 70 miles per hour, and/or storms with ...