Forecasters say cold, dry weather with areas of freezing fog will continue into the middle of next week in Washington.
The National Weather Service says a frontal system could arrive Tuesday night or Wednesday, returning rain to Western Washington and creating a chance of snow in Eastern Washington.
A strong high-pressure system over the Northwest is expected to last through the weekend, extending the stagnant air advisory through Sunday at 6 p.m. and potentially causing breathing problems for vulnerable people.
Friday’s forecast for the Vancouver area calls for patchy freezing fog before 10 a.m., sun and a high near 42 degrees.
