* WHAT...Snow showers expected. Total snow accumulations of 4 to 6 inches above 4000 feet, with higher amounts possible in the high terrain. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Whatcom and Skagit Counties, Olympics, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 8 AM PDT Sunday. * IMPACTS...Late season snow showers in the mountains may impact those enjoying outdoor recreation in the mountains above 4000 feet Friday through Saturday night. Warm road temperatures may limit roadway accumulations. However, temporary road accumulations will be possible in heavy snow showers. * ADDITIONAL DETAILS...Expect cold conditions in the mountains. The highest chances for heavy showers will occur Friday afternoon and again Saturday afternoon. These showers could be accompanied by lighting and small hail.