Here's a nifty tool for all of you western Washingtonians who are wondering if you want to go out and ride or not - it shows the road surface temperatures and is a fantastic predictor of wether or not there will be black ice on the roads (or regular ice for that matter).
http://www.atmos.washington.edu/SNOWWATCH/

*click on either full domain or greater metro when you get to the page or it may show nothing!