Well Census did not release migration information but Moving.com did a survey on top searches. Not Seattle mostly Sunbelt cities
https://www.sparefoot.com/self-storage/blog/17354-most-popular-moves-2016/ Destination-(rank)Origin
Atlanta - (4)New York, (11)Miami, (12)Chicago
Chicago - (19)Los Angeles
Dallas - (8)Los Angeles, (15)Chicago
Las Vegas - (3)Los Angeles
Los Angeles - (6)New York, (7)Chicago, (17)Miami, (20)North Jersey
Miami - (1)New York, (5)North Jersey
New York - (9)Miami, (18)Los Angeles
Orlando - (13)New York, (16)North Jersey
Phoenix - (2)Chicago, (10)Los Angeles
Tampa - (14)New York