They are uncommon in Boulder County, but CAN happen here. Therefore, they should not be taken lightly.
Tornadoes often accompany severe thunderstorms and are only one of many thunderstorm hazards.
The City of Boulder's outdoor warning sirens will be activated if a tornado is detected. Stay away from windows, doors, and outside walls and protect your head. In homes and small buildings, go to the basement or to an interior part on the lowest level - closets, bathrooms, or interior halls. Get under something sturdy. In schools, nursing homes, hospitals, factories, and shopping centers, go to pre-designated shelter areas.