Travel yesterday was not a problem. It was therefore a complete surprise this morning when I discovered that US 150, which I travel on for about 3 miles to get to the freeway, was covered in several inches of blowing snow and very nearly impassable. I started to skid several times on the way in, but managed to recover before losing the road. By far the worst driving conditions yet from this mess, and I don't understand where it came from. I don't believe there was any new snow, and the weather report wasn't reporting the kind of wind speeds that it takes to pick up large amounts of well-settled snow like this. I also don't understand how several hours worth of snow managed to build up on an important secondary road without anyone noticing and getting a plow on it. There's an IDOT garage half a mile from the east end of this stretch of road.