It's gone final at 4-4. Wild, wild match.
Sounders move to 2-2-1 on the season. Timbers remain winless at 0-2-3.
I'll be back with notes and quotes
87th Yedlin taken down in box, and Dempsey knocks home the tying PK. 4-4. Dempsey records fifth hat trick in Sounders history.
86th minute: GOAL Sounders. Dempsey finishes with determination and skill. Timbers, 4-3.
57th minute: Urruti steals pass at midfield, carries a bit, and then bends it inside far post. Portland, 4-2.
56th minute: GOAL Timbers. Sounders do not close down space on Chara and he makes them pay.
Second half: ...has begun.
Halftime: 2-2. Sounders went ahead. Timbers equalized. Timbers took lead. Sounders caught up. Wow.
24th minute: Oba finds Dempsey in space in front of Timbers goal, and Clint finishes calmly. 2-2.
14th minute: GOAL Timbers. Portland takes 2-1 lead in 14th minute, nice turn and shot into top of netting from Valeri.
9th minute: GOAL Timbers, as Chara sends in a screamer past Frei.
3rd minute: GOAL Sounders on corner kick. Cooper finishes hard vollied cross from Anibaba.
First kick: ... has been struck. Timbers in green/white; Sounders in pitch black/neon green.
Lineups: For Sounders: GK Frei; D Yedlin, Marshall, Anibaba, Gonzalez; M Ariza, Alonso, Pineda; F Dempsey (captain), Martins; Cooper. Reserves: Hahnemann, Scott, Remick, Pappa, Neagle, Parsemain, Barrett
For Portland: Weber, Powell, Kah, Paparatto, Harrington, Johnson , Valeri, Chara, Alhassan, Urruti, Nagbe. Reserves: Gleeson, Danso, Jewsbury, Zakuani, Zemanski, Fernández, Piquionne
It's derby day as the Sounders and Timbers will meet in the first Cascadia Cup match of 2014.
Coverage on NBCSN will begin at noon, although I believe first kick will be 12:23. The game will be heard on the usual radio outlets, and we'll be blogging all day. Additional news and comments will be on Twitter @donruiztnt.
It is a cool, cloudy morning, and we're told rain could come and go all day.We'll be back as news develops, including with what could be some very interesting lineups for both teams.