* WHAT...Snow expected. Total snow accumulations of 2 to 5 inches from Monday morning through Monday night. Another 0.5 to 2 inches of snow is expected from Tuesday morning through Tuesday night, then another 2 to 5 inches of snow is expected from Wednesday morning through Wednesday night. * WHERE...Foothills of the Northern and Central Oregon Cascades, North and Central Coast Range Mountains of Oregon, Willapa Hills, and South Washington Cascade Foothills. * WHEN...From 4 AM Monday to 4 AM PST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...The reason that forecast snow amounts are lowest on Tuesday is because precipitation will become light and more isolated. However, precipitation becomes relatively heavier and more widespread again on Wednesday.