Over a 24h period ending Saturday at 5 PM, good rain along the coast and western Oregon, but only light rain reaching Puget Sound
For the next 24h (Monday), still wet over the coast and offshore, but not much over the interior.
On Tuesday, significant rain engulfs western Oregon and Washington.
Bottom line: if you keep away the coast, this weekend will be tolerable and eastern Washington should be pleasant. But wetter conditions are expected later in the week over both sides of the Cascades.