Severe weather strikes Denver area with multiple tornadoes and hail warnings.

A "large and extremely dangerous tornado" hit northeastern Highlands Ranch in Colorado, causing damage to trees and roofs. No injuries have been reported so far. Severe weather is expected to continue throughout Thursday afternoon and evening across the Front Range, with localized flooding and power outages reported. The National Weather Service sent a push alert to cellphones in Denver warning of baseball-sized hail, but hail that size apparently never fell. This is a developing story.