The warning is in effect until 6 p.m. Wednesday for the North Fork of the Stillaguamish River in Snohomish (snoh-HOH'-mish) County. The weather service says it expects some flooding of homes and roads to continue until a newly forming river channel is large enough to drain the lake behind the slide blockage near Oso.
A flash-flood watch is in effect through Monday afternoon although the weather service says the likelihood of a flash flood below the blockage is very low.
A warning means flooding is imminent or already happening, while a watch means conditions are favorable for flooding.
Crews continue to search site of the mudslide for survivors or bodies. The official death toll is at 16, while another eight bodies have been located but not yet recovered.