pressureNET is an Android application with which users can contribute to a global network of user-contributed atmospheric pressure readings.
To use the application users need a tablet or phone with a barometer. However you don't need an android device to view the atmospheric pressure readings, visualisations of which can be seen on the pressureNET website.
The visualisation allows the user to select a location on a Google Map and select specific dates for readings. A graph of the resulting readings are then displayed beneath the map.
At the bottom of the pressureNET website are quick links to view recent notable events, such as Hurricane Sandy (pictured) and Hurricane Issac.