Blower watch

http://www.accuweather.com/

they have a more accurate 15 day forecast.

For utah I use Snow on the go from noaa. It updates temp and wind at all locations and updates hourly snow totals from a few locations like middle of Alta and top of Solitude.

if your from the east check out ski the east dot com pretty nice or just weather channel

TGR's new snowlab page will show you new snowfall at mountains around the world.  It also has webcam links and radar feeds.  The page is still being worked on almost daily but its headed in the right direction.  http://www.tetongravity.com/snowlab/

NOAA and get educated in weather forecasting and how it actually works. Then you can read the forecast discussion and make sense of things.

The 15-day on accuweather is ok for general temperature trends, but past 7 days, the predictibility of rain/snow/sun drops off considerably and it can be strongly argued that those are better used for entertainment.

I'm not a fan the The Weather Channel as I find they focus primarily on highly populated areas, and neglect the mountainous areas greatly.

NOAA