A cold front is sweeping into Oregon from the Gulf of Alaska, turning today into a day of transition.

A cold front is sweeping into Oregon from the Gulf of Alaska, turning today into a day of transition. By Tuesday, sensible sorts will take a sweater and maybe an umbrella when they leave the house.

Marine air is spreading a layer of low clouds over coastal counties already. Today's high temperatures will be cooler than Sunday's. Winds will pick up inland this evening as the front approaches.

Those winds, coupled with still-dry air, could fan fires to the north and cause any new blazes to spread rapidly. However, cooler and moister air is right behind.

"That could help with the firefighting situation," said Mike Petrucelli, a meteorologist at the National Weather Service office in Medford.

With a cold air mass overhead and significant cloud cover, Tuesday's top temperature won't climb out of the mid-60s, he said.

"It will be colder and showery," Petrucelli said.

Although the possibility of showers is strong, they likely won't deliver much rain in the Rogue Valley. More rain is expected in the mountain and to the north, with a chance of snow at Crater Lake and other high elevations.