Moderate to heavy rain with higher mountain snow is expected late tonight/early Sunday through Tuesday as an atmospheric river moves into the area. Snow levels will be around 4000 ft today, rising to over 6000 ft late Sunday into Monday. Ponding of water on roads and rapid rises on small streams and creeks is expected west of the Cascades. Localized small stream flooding is possible along the coast and in western Siskiyou County where precipitation rates will be highest and most persistent.