App Answers: Will It Rain in the Next Hour?

Jack Turner and Adam Grossman, two web developers from Troy, New York, say they have invented a mobile app that makes remarkably precise short-term weather forecasts. Using radar data and your phone's GPS, it promises to tell you the exact minute it will begin raining or snowing your location, and how long it will last.

There's a catch, however: The app, called Dark Sky, only works over a short period of time – up to about an hour in the future. 

The data comes from the same government radar every prediction site/app uses. The difference is the algorithms used. Dark Sky models between the radar snapshots and makes lots of assumptions, which in turn make it helpful but not foolproof. The app is expected on iOS in spring with an Android version perhaps to follow. Funding for the app was from Kickstarter (aka crowdsourced funding!)

- CNN