http://www.snowalarm.com/reports.php...egion=Colorado
This is the most full featured I've seen. Updated several times a day. Displays discrepancies between what the resort reports and what other sources report. Cams. Alarms. Radar, satellite, and other weather forecasting tools. Developed in Fort Collins by Marty Bell and Mike Weissbluth, two well respected local skiers/kayakers/meteorologists.