Tornadoes and Flash Flood in Colorado, August 10, 1999

Thunderstorms producing tornadoes, damaging straight-line winds, heavy rain and hail hammered portions of the Urban Corridor and Northeast Plains. In Denver, heavy rain and small hail, up to 2.5 inches in an hour, caused a 20-ft by 50-ft section of roof to collapse at a furniture warehouse. Damage to the warehouse was estimated at $1.0 million. Heavy rain also flooded several underpasses with up to 3 feet of water, which resulted in a number of stalled vehicles. Damaging straight-line winds along with several tornadoes were reported across Weld and Morgan Counties. In Fort Lupton, officials believed a tornado bounced from southwest to northeast across the area. Spotty damage was reported along a 5-mile path as trees, power poles and lines were downed. In addition, an empty semi-trailer was overturned onto another vehicle northeast of town. Another tornado touched down briefly in Platteville where a tree fell onto a house. Strong thunderstorm winds also blew a pickup truck off of Interstate 76 near Fort Morgan.Heavy rain and large hail caused flooding and flash flooding problems in parts of Logan and Phillips Counties. Storm totals ranged from 3 to 6 inches southeast of Haxtun, near the Yuma county line. Several county roads were washed out with widespread field flooding reported. Heavy rain and hail also stripped corn and sunflower crops in the area.