Here's an on-line radar view:
http://radar.wrh.noaa.gov/radar/loop.../si.kmux.shtml
I don't know what to say. It'll probably turn out to be a fine day, but the weather reports haven't backed off from "Showers and thundershowers likely." It's the threat of thundershowers that I'm not too keen on.
Hope you have a great time, that's a nice route! I love going down Bailey Rd (up's no so bad,either).