Some snow is headed to Jackson County, and some could reach as low as the valley floor.

A winter storm warning is in effect for areas above 2,500 feet in elevation, and a winter weather advisory is in effect for areas below 2,000 feet in elevation, according to a bulletin from the National Weather Service. Both advisories are in effect from 1 p.m. Tuesday afternoon until 7 a.m. Wednesday.

Precipitation is expected to start falling around 4 p.m., with a possible period of gusty winds as it arrives.

"It's going to begin as rain in Medford from the looks of it," said meteorologist Brett Lutz. "As the precipitation's falling, the temperature's going to be falling. It's going to be a race to see how fast the cold air drops snow levels."

Anywhere from a trace amount of snow to an inch could fall over Medford, with a bit more for the foothills surrounding the Rogue Valley. Accumulations of up to 6 inches are expected in areas above 2,500 feet, with as much as 10 inches in some isolated areas. Amounts anywhere from a foot to 17 inches are predicted across the Southern Oregon Cascades.

The heaviest snowfall is expected from Tuesday afternoon until early Wednesday morning, when snow levels are forecast to drop below 2,000 feet.  Showers are expected to continue Wednesday.

The storm is expected to affect mountain highway travel, which is "strongly discouraged," during the weather event, according to the Weather Service bulletin.

Anyone who must travel is advised to carry tire chains, a flashlight, blankets, food, water, medications and a fully charged cell phone.

— Reach reporter Ryan Pfeil at 541-776-4468 or Follow him at