Major winter storm sweeping across Colorado DENVER (AP) - A powerful winter storm moving across Colorado Friday dumped more than a foot of snow in some areas as it prompted a blizzard warning, forced flight cancellations and school closures, and drew calls from highway officials to slow down on icy and snow-packed roadways. Snow began falling Thursday night and by 3:30 a.m. MST Friday, six inches had fallen on downtown Denver, more in suburban areas and up to 15 inches in the foothills west of the city, National Weather Service meteorologist Bob Kleyla said. It's been pretty consistent. Snowfall rates have been about an inch per hour," he said. Boulder and some areas just north of Colorado Springs were struggling with 10 inches of snow, Kleyla said. Despite the weather, there have been no road closings anywhere in the state, Jarrett Handy, a traffic specialist with the Colorado Department of Transportation, said early Friday. "At the present time, roads are icy and snowpacked," he said. Our crews are definitely out (and) doing their best to keep them open. He urged motorists to drive cautiously, especially during rush hour. The storm warnings prompted shoppers to stock up on food and liquor, while Colorado lawmakers canceled legislative work on Friday. Stores in Denver reported brisk business Thursday night. Kleyla said the storm might not be as bad across Colorado's eastern plains as forecasters thought, but added "they're still going to get a good amount of snow." The storm forced the cancellation of more than 150 arriving and departing flights at the Denver airport that had been scheduled through Friday night. The city's 10th biggest dumped 22.1 inches in 1912, NWS meteorologist Chad Gimmestad said.