The new 'Forecast' app is not your father's weather predictor.
There's a lot of unique ideas within the Forecast app from the Dark Sky Company, not the least of which is its global worldwide focus. Load up the app on a computer's web browser or on iOS and Android, and you can see your local weather related to the rest of the globe. This macro level of data gives a big appreciation for the chaos that is global weather patterns. Also, the Forecast app contains the previous 100 years of weather data, allowing users to travel back in time to settle bar arguments about what day that huge blizzard that closed all the schools was 20 years ago.
The Forecast app has a very user friendly interface and features some impressively smooth weather animations. Even better, the API that powers the app has been made open source for other developers to tinker with.