NWS Forecast Office Spokane, WA

Cold temperatures and clearing skies tonight will lend to frost forming over portions of the region. Most likely areas to see frost overnight will be across the northern mountain valleys in the Okanogan Highlands and Northeast Mountains. These communities are within a frost advisory that will go into effect at 2AM through 8AM Monday. Patchy frost will also be possible over portions of the Upper Columbia Basin, Spokane Area, Palouse and Idaho Panhandle.