Snow is sifting into the Rogue Valley today but likely won't pile up, forecasters said.

Snow is sifting into the Rogue Valley today, but likely won't pile up, forecasters said.

Moisture is spreading north from a low-pressure system offshore of San Francisco, delivering light precipitation across Northern California and Southern Oregon. It's falling as snow here because cold air from an arctic air mass that settled over the region has lingered, said Rick Holtz, a meteorologist at the National Weather Service office in Medford.

Heavy cloud cover today will keep temperatures in the 30s today in the valley, he said. Snow will continue through the day, but will be so light that less than an inch should accumulate.

Even in the mountains, only 1 to 3 inches of snow is expected.

The light precipitation will taper off tonight, and Friday should be fairly dry, with a 40 percent chance of showers in Medford. Starting Saturday, the weather will become increasingly unsettled with a series of weather systems moving through bringing more rain and snow, especially in the mountains, the forecast said.

— Anita Burke