Shortly after 4:00 p.m. MDT today, a severe storm developed over Aurora, Colorado. Witnesses on the ground in northwest Aurora spotted dark clouds forming, including one person who reported seeing spiraling clouds hinting at a possible tornado. In the background, tornado sirens wailed. To the east, a funnel cloud was photographed over Anschutz Medical Campus.
By 4:30 p.m., severe rain was reported in the Montview area, including pebble-sized hail. The rain and hail continued for over an hour. Severe flooding resulted, with reports of water over 2 feet deep near 6th and Lowell.
Just south of Montview, near 17th and Dayton Street, a hail swath hit the neighborhood. As seen in the picture, one homeowner had over 12 inches of hail in her front yard. According to her son, “I am a native Coloradoan, and have never seen this much hail accumulate in such a short period of time.” He added, “The hail came in two waves, and lasted for about an hour.”
In the surrounding area, houses and front lawns were covered in a blanket of hail stones and puréed leaves. Streets were also covered with leaves and branches.
One spotter in downtown Denver reported a stranded vehicle with water up to the windows. The National Weather Service issued a flood warning for the South Platte river at Henderson until Thursday afternoon. Reports of widespread flooding across the Denver metro were being reported, including Cherry Creek being over its banks.
Hail stones up to 1.50 inches were reported across the Denver metro, and mainly to the south and south-east.