Portland, OR -

A winter storm accompanied by plunging temperatures hit Oregon on Friday.

Snow is expected in all parts of the state, with accumulations ranging from 1 to 3 inches on the south coast to 7 to 10 inches in areas east of the Cascade Range.

Schools began hunkering down, either closing or curtailing hours.

Arctic air intensified the cold snap that has been widespread across the U.S. West.

In Blue Mountain towns of Eastern Oregon, for example, the Weather Service said the wind chill effect would make temperatures seem to be minus 15 to minus 25.

The National Weather Service says the cold weather will last through the weekend and transition to milder and wetter conditions by the middle of next week. That could start as ice for many inland areas.