The Raspberry Pi has many uses, people, myself included, have been using them for weather forecasting for a while now. However, the National Weather Service is wanting to utilize the Raspi's to help gather weather data in remote areas where a commercial weather station, which can cost $10,000+, is financially unfeasible to install and maintain. They are planning to use the Raspberry Pis with off the shelf parts and some parts made with 3D printers to create weather stations that can be made for around $200. This would make it affordable enough to have them in remote locations, including Africa, which up to now is a weather data desert. If these little kits work out, it will make it possible to better forecast the weather, and gather data on weather trends. You can read more about it here. You can learn how to build your own Raspberry Pi powered weather station by going here.