SEATTLE (AP) -- The National Weather Service says Arctic air pushing into the Northwest will keep temperatures unseasonably cold all week, but there's no sign of significant snow.
Meteorologist Mike McFarland in the Seattle office says the cold spell is caused by a dry air mass. The clear skies at night are dropping some lows into the single digits and below zero in Eastern Washington.
Western Washington is having a good hard freeze with lows in the teens and highs in the 30s.
McFarland says this is the kind of freeze-your-pipes cold that only hits Western Washington once or twice a winter, typically.
He says the temperatures should start to moderate by the end of the week.