Dakota, I use both the WeatherBug and the Weather Channel apps. One is set for the weather at home with a widget on my home page and the other one is used to find the forecasts for current location. While I use the radar on both of these apps, the one I was talking about is RADAR NOW because I don't have to do anything but open it and it's always set to current location. Try it, I think you'll like it.
I'll have to try Radar Now myself, thanks for mentioning it. I use the Weather Channel app pretty frequently myself, much better then the standard Weather app that comes with the iPhone.