A tornado reportedly touched down near US 85 and Weld County Road 18 in Fort Lupton July 28, which prompted a tornado warning from the National Weather Service.
Authorities spotted a funnel cloud near US 85 and Weld County Road 18 near the North Station around 3:45 p.m. July 28.
Photographer John Carr said the storm appeared to touch down twice. He said the storm picked up "quite a debris field" from nearby farms as opposed to the normal rope tornadoes that tend to pick nearby sources of moisture.
Weld County sheriff's deputies have received no reports of damage. The warning expired around 4:15 p.m.
Southern Commerce City was under a tornado warning for part of the afternoon as well. Social media showed pictures of some overturned soccer goals at Dick's Sporting Goods Park.
The National Weather Service reported two tornadoes. One landed on the southwest side of the Rocky Mountain Arsenal Wildlife Refuge, about a mile north of Interstate 70. No damage was reported. The second tornado touched down 8 miles north-northwest of the airport.
Meantime, heavy rain and small hail pounded Brighton after the tornado warning expired. It caused some flooding of streets. There have been no reports of damage from the round of rain and hail. The weather service posted a flood advisory for Brighton that was to expire early in the evening.