Current Data
Surface:
http://weather.rap.ucar.edu/surface/
https://avalanche.state.co.us/obs_stns/stns.php
http://mesowest.utah.edu/cgi-bin/droman/mesomap.cgi?state=CO&rawsflag=3
Schofield SNOTEL: http://www.wcc.nrcs.usda.gov/nwcc/site?sitenum=737
Upper-air soundings:
http://weather.rap.ucar.edu/upper/
Radar & Satellite:
http://www.weathertap.com ($84/yr, great mobile website as well)
Discussions
NWS: http://www.nws.noaa.gov/view/prodsByState.php?state=CO&prodtype=discussion
OpenSnow: http://opensnow.com/dailysnow/colorado
CAIC: http://avalanche.state.co.us/forecasts/weather/zone-forecast/
http://wasatchweatherweenies.blogspot.com
Forecast Models: Twisterdata.com
Top Center
NAM = 84hr 12km resolution
GFS = 384hr 27km resolution
RAP = 18hr 13km resolution
Left Side
700mb = orographic wind direction
500mb = vorticity
300mb = jet stream
Upper Right
Clickable map = one forecast image
Animated loop = all forecast images
Compare models = toggle between each model
dProg/dt = see the trend in the forecasts
Forecast Models: CAIC
High-resolution version of the NAM model
Graphics: http://avalanche.state.co.us/forecasts/weather/model-forecasts/
Points: http://avalanche.state.co.us/forecasts/weather/point-forecasts/
Forecast Models: Weatherbell.com
Access to European model graphics and many other models. Fantastic data. $185/year