from THU 11:00 AM PDT until SAT 11:00 PM PDT, Lower Columbia and I - 5 Corridor in Cowlitz County

from THU 11:00 AM PDT until SAT 8:00 PM PDT, East Slopes Northern Cascades, Wenatchee Area

Air Quality Alert

until FRI 11:00 AM PDT, Ferry County, Okanogan County, Stevens County

WATCH: What could have triggered the deadly mudslide?

By Tyler Slauson

Published March 23, 2014

Q13 FOX Chief Meteorologist Walter Kelley explains the science behind mudslides.