The overnight storm will complicate the search expected to continue Friday for a Denver doctor missing since Sunday in Big Cottonwood Canyon.

Jake Gradwohl, 28, a resident physician at University Hospital, has been missing since he apparently went for a hike in the Mill B trail area of Big Cottonwood Canyon Sunday.The Salt Lake County Sheriff's Department has established a command post near the mouth of the canyon at the Holladay Gun Club. The missing man's parents came to Salt Lake City from Denver to watch the progress of the search, which has been joined by 15 search and rescue officers from Colorado and Idaho.

Some 40 Salt Lake-area searchers are also scouring the area, 4 1/2 miles up Big Cottonwood Canyon, for Gradwohl.

The searchers could be working in 8 inches of snow by Saturday, according to the National Weather Service forecast.