I am not sure if you have this in this thread yet.
Seattle is going from a double regional to a single regional.
There is a new "Central Washington Regional," though I am not sure where it is located.
•Portland March 6-9 (64 teams) (week 2)
•Central Washington (52 teams) March 20-23 (week 4)
•Seattle Century Link (64 teams) March 27-30 (week 5)
•Spokane April 3-6 (52 teams) (week 6)