The National Weather Service is forecasting total snow accumulations of 3 to 6 inches in the foothills of the northern Blue Mountains between now and 4 p.m. on Friday.
Travel could be difficult with hazardous conditions impacting morning and evening commutes.
In the Hermiston area, freezing temperatures are expected to continue into next week with overnight lows in the single digits forecast for Friday and Saturday.
The latest road conditions can be obtained by calling 511, or by visiting online.