More stagnant, polluted air is on the way for the Rogue Valley this weekend, forecasters and air quality officials say.

More stagnant, polluted air is on the way for the Rogue Valley this weekend, forecasters and air quality officials say.

The National Weather Service in Medford has issued an air stagnation advisory that forecasters expect to remain in place until Tuesday afternoon. Jackson County declared today a "yellow" day for wood burning, meaning burning is allowed only in certified woodstoves.

Pollution at Rogue Valley monitoring stations, meanwhile, remained in healthy ranges this morning, although it had deteriorated in some other parts of the state and was in the unhealthy range in Klamath Falls.

The weather service said light winds are predicted in Southern Oregon until Tuesday, when a new cold front is expected to move in, bringing wind and better ventilation.

Until then, "inversions will trap smoke and other pollutants in the valleys of Douglas, Klamath, Jackson and Josephine counties," the advisory said.

— Staff reports