TruWeather is a near realtime precipitation map of North America. It shows the current precipitation and 3 hours of historical data from Environment Canadas high resolution radar system.
Rather than trying to predict the weather with a fallible algorithm, truweather is the only app that gives you actual radar data so that you can forecast with the most powerful computer known to exist -- your brain!
The radar map is accurate to 4 meters and 10 minutes: true weather.