National Weather Service
Awesome weather resource providing in depth coverage of all types of weather. Marine, storm, national and state weather information make this site a gold mine of information.

Forecasts/Current conditions
State and Region
Get forecasts, current conditions and weather warnings for state, region and local areas. Interactive and informative site to check out the weather for an upcoming trip, local or long distance.

Current Radar Image of the US
Real-time image of the continental US.

6 Hour animated radar image of the US
See the last 6 hours of weather activity over the US.