I heard today there was snow on the ground in Darrington yesterday, which is about 400 feet above sea level. They didn't say how much, probably not a lot. I skied yesterday in Plain and the day before in Leavenworth, at 1,200 feet. Based on that and the early season rides I've done up there, I don't think you'll make it far beyond Ross Lake coming from the west. (They're still skiing in Mazama so you won't have much luck from that direction.)