A dusting of snow covered the north end of Whatcom County and the lower mainland of British Columbia early Monday, with more in the forecast this week.
More snow was reported farther south – Alaska Airlines canceled about two dozen flights into and out of Sea-Tac Airport, and schools in the Vancouver, Wash., area started classes late Monday morning.
In Whatcom County, most roads remained clear for the morning commute as a mixture of rain and snow fell. A few crashes were reported to emergency dispatchers, but no serious injuries were reported and it was unknown if any were weather-related.
Forecasters at the National Weather Service in Seattle said up to 4 inches of snow are possible in parts of Western Washington Monday night into Tuesday.
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Snow also was reported just after 8 a.m. Monday in Blaine, Lynden, Nooksack and Sudden Valley, according to posts on social media.
On Tuesday and Wednesday, Western Washington could see its coldest temperatures of the year as a northeast wind carries frigid air from the Fraser Valley of British Columbia. Sunny skies are forecast both days, with high temperatures barely above freezing.
Snow showers may return Wednesday night, changing to rain and snow late Thursday morning as temperatures rise.
Rain is expected through the weekend with high temperatures in the 40s.
The Associated Press contributed to this report.