Snow is falling on the Siskiyou Summit.
As much as two inches are expected to fall at 4,000 feet and above within the next four hours before precipitation tapers off, weather officials said.
As of Saturday afternoon, only about one-tenth of an inch of rain had fallen in Medford, but weather officials predict much more is on the way.
"The real strong front is due to come in on Monday," said National Weather Service meteorologist Mike Ottenweller. "That's the one that will continue basically through Wednesday."
About a quarter-inch is expected to fall Monday during the day in Medford, with up to another half-inch Monday night.
"We're going to have precipitation probably all the way through Wednesday off and on here in Medford," said NWS meteorologist Tom Wright.
Winds today reached speeds of up to 20 mph in Jackson County, with gusts as high as 30 mph. Wind speeds could reach 30 mph with 40 mph gusts by Monday night.
The surrounding mountains could receive up to two inches of rain by Monday night.
Motorists using Interstate 5, especially the stretch running over the Siskiyou Pass, should check www.tripcheck.com for updates on road conditions and forecasts.