Warming temperatures and rain are headed toward Ashland and the rest of the Rogue Valley the rest of this week, according to the National Weather Service.

Light snow showers began in Grants Pass and Medford early this morning, said meteorologist Dan Weygand. He expected snow showers throughout today, with accumulation up to two inches by Wednesday morning.

Temperatures should reach the upper thirties by Wednesday and climb into the forties by Thursday, leaving rain in Ashland and more snow above 3,000 feet, he said.

Two snowmobilers missing over the weekend in Eastern Oregon have been found, but one was hypothermic and a rescue helicopter was socked in by snow Monday afternoon.

The two got stuck in the 4 feet of snow that fell in the Wallowa Mountains, the Baker County sheriff's department said.

One, 50-year-old Sam Bowman, was safe in a cabin, said Jerry Boyd, 911 dispatch director.

He said the other, 18-year-old Brennan Anderson, was reported to be "extremely hypothermic" and under the care of a nurse and paramedic who flew in on a helicopter.

But, Boyd said at mid-afternoon Monday, the snow was too heavy for the helicopter to lift off.

Much of the state reported treacherous road conditions early Monday &

a film of transparent ice known as "black ice" because it lacks the gloss of thicker ice and so is hard to see.

Interstate 84 was closed Monday afternoon as a result of crashes. It was the third straight day that all or part of the highway that traces the route of the Oregon Trail has been shut down for hours at a stretch.

Snowfall in the Southern Willamette Valley and the Rogue Valley farther south shut down many activities. The Rogue Valley International-Medford Airport was closed for five hours on Sunday, for example, and numerous flights were canceled or delayed into Monday, according to Bern Case, airport manager.

Many schools closed or delayed their openings Monday.

The National Weather Service said snow would resume Monday night as another cold front moved into the state.

In the Cascade Range, snowfall of up to — feet was possible by Tuesday afternoon, but little accumulation was expected on the floor of the populous Willamette Valley, the Weather Service said.

The Associated Press contributed to this story.