Check out the weather satellite image of the North Pacific Ocean from this morning. (Don't know how to take a 'screen shot' so it'll change as time goes along).
I've never seen a system stretch right across the whole north Pacific before. Usually our big rain events stretch in a long column from around Hawaii to BC or SE Alaska; we call them pineapple expresses around here.
Could "The Blob" (an abnormally warm body of water that has persisted in the north Pacific Ocean for several years) be a contributing factor?
Will be interesting to see if we have another long cold winter up here like last year, if Vancouver gets our snow again, and if California gets Vancouver's winter rains...