Tons of weather app out there and if you like to get notice you definitely need to design with the fresh approach with beautiful User Interface.
Outside is just beautiful in terms of impeccable attention in visual design as well as interaction design. When i saw first time there video have one words, wow! I really love this 🙂

Their human-centric approach manifests itself mostly in the importance they place on user-defined notifications based on certain conditions. What’s so wonderful about this is that this is the kind of stuff that you really care about 90% of the time – weather changes that will affect your behavior. via everydayux

vivek