Wow! Some very unusual Oregon weather. I have a cousin who is going to school in Eugene, him and his roommates apparently tried to save some money by not having the gas turned on in their house. Well with the cold weather prediction they decided to get it turned on, only to find out too late that the heating system is broken. You can imagine they have been pretty cold. I think they actually ended up staying with some friends for awhile. I grew up in Lincoln City (Otis actually, which is near Lincoln City), apparently they even got a little snow on the coast which is pretty rare.

I have also been running Schwalbe marathon's in some similar weather conditions (though mine are a bit wider 26x1.5"), I find they do fine but I do run them at a pretty low pressure under icy conditions, I find the lower tire pressure makes a huge difference, yesterday evening was the worst day yet, it had warmed up a bit during the day so some of the snow melted, but in the evening it got cold and windy and the melted snow refroze, some of the paved surfaces got extremely slippery and the packed snow got a layer of ice on top. I managed to avoid some of the ice by riding on the side in the snow rather than on the paved surfaces.