I was driving across the country and found a quick way to look at the national weather radar.
AccuWeather is good for local/regional weather, but I was taking the family on the Griswall Road Trip and wanted something more. We were heading from Houston to DC and I just looked up the IAH to EWR (Newark) route on Flight View. This connection flys about every hour. I found one that was "In Flight" and it shows the country that the plane is going over and the radar of the entire route. PERFECT.
Just a nice quick tip for those of you road tripping this summer!