Both the B/C and C rides are going as planned at 1:30 p.m. Roads are amazingly clean and dry. Road bikes should be fine. A few places where chunks from plow are encroaching on road/shoulder, but shouldn't be a problem.
Just an FYI -- to get to the portable toilet in Walton Park you'll have to go thru some snow/slush so you may want to stop at the Holiday or Hy-Vee gas stations prior to coming to the ride start and not get your feet wet.