Charts and more detailed weather information specific to Oroville is available at WxOrovilleWA
Weather Forecast (often based on Omak, 45 miles south)
For Washington State road conditions Dial 511 within the state, call (800) 695-7623 or go to the WSDOT Web Site.
Idaho: Call: (888) 432-7623 or go to their Web Site.
Montana: Call: (800) 226-7623 or go to their Web Site
Oregon: Call: (800) 977-6368 or go to their Web Site.
For British Columbia, go to their Web Site