I agree with the comment that Cascade Crud is not particularly accurate regarding temperature or precip amounts. It tends to overestimate the amount of snow expected (possibly it's assuming the max of the range provided by the NWS?)
For my money, one of the most valuable tools is the "Graph Fcst" links on this page. Both the point forecast and graph forecast links on the following page are calibrated to be as close to the base area of each ski resort as possible.
www.nofriday.com/snow/
Being able to see the trends for temp, wind and precip by hour all lined up is super useful for me. The six hour snow total summaries have been a goldmine in terms of trying to time my trips to the mountains. One thing to remember is that, while computer models are good, there is less certainty in the forecast than those graphs might lead you to believe.
