1984. – Seattle's "underground" hip-hop scene breaks out with big Exhibition Hall gig on August 17, 1984.
http://www.historylink.org/index.cfm?DisplayPage=output.cfm&file_id=9778
1985 - Nastymix Records, the Northwest's first hip-hop label was founded with release of Sir Mix-A-Lot's "Square Dance Rap"
http://www.youtube.com/watch?v=hCfMNotEprw
1987 – Spring Rapfest hip hop concert ends in mini-riot outside Seattle's Paramount Theatre on May 16, 1987.
http://www.historylink.org/index.cfm?DisplayPage=output.cfm&file_id=9777
1988 - Sir Mix's 1988 "Posse on Broadway" gains national recognition:
http://www.youtube.com/watch?v=e1Wx2Yml-b4
CDs: http://tinyurl.com/sirmix-uw
1988 – DJ Nasty Nes hosts Seattle’s first radio hip hop show, “Rap Attack,” on KCMU.
http://rapattacklives.com/
1989 – Nastymix Records' party marks Gold Record awarded to Sir Mix-A-Lot's SWASS album on April 29, 1989.
http://www.historylink.org/index.cfm?DisplayPage=output.cfm&file_id=9793
2002 --Seattle Blows Up with Local Hiphop: The Return of the Artists in 2005
by Charles Mudede http://www.thestranger.com/seattle/Content?oid=25361
Also check out EMP's Hip-Hop timeline for a meta view of the national scene: http://www.empmuseum.org/exhibitions/index.asp?categoryID=129&ccID=133
2009 -- Macklemore "The Town" http://www.youtube.com/watch?v=pIBdAdnTqqo
2011 – Shabazz Palaces -- http://www.youtube.com/watch?v=67cx9M2c51M
2011 – THEESatifisfaction -- http://www.youtube.com/watch?v=yoy2PMqRQBY
http://www.youtube.com/watch?v=XMuSM12UzyU