Heavy snows in the Western mountain regions snarled air traffic Thursday in Denver and were blamed for a 40-car pileup on a Utah interstate. Up to 18 inches of snow was forecast before today in the southern and central Rockies, the National Weather Service said.
Up to a foot of snow fell in some parts of Colorado. Inbound flights at Denver's Stapleton International Airport were delayed as much as three hours, and outbound flights were departing 90 minutes late, spokesman Norm Avery said.
The Federal Aviation Administration shut two major runways because of northerly winds.
Four inches of snow was on the ground at Alamosa and three inches fell on the Denver area Thursday.
Snow fell across Utah, where a snow advisory continued through Thursday afternoon in the eastern portion of the state. Up to nine inches of snow was measured at Kanosh and six inches at Knolls.
Blowing snow and bumper-to-bumper traffic near Cedar City, Utah, touched off a 40-car pileup Wednesday night on Interstate 15. About 20 people were injured, two critically, and hundreds of travelers were backed up for hours, the Utah Highway Patrol said.