You can use this free app to monitor the river in your state during a rain storm, or monitor any or all of the 1,753 river/stream/creek systems throughout the US and Puerto Rico during major floods... or you may be interested in water flow rate to help you decide the level of rapids before planning a rafting trip. This free version includes about 1,753 rivers, streams, and creeks - this is a lot of information! In contrast, the PRO version includes more than 9,000! River and Stream PRO can be found on the Windows Phone Marketplace: http://www.windowsphone.com/en-us/store/app/river-and-stream-pro/9922b152-021a-40e5-b5bd-f057849b05f6 This app displays selectable real-time USGS flow data (cubic feet per minute or gallons per minute) and water temperature for US river and stream systems that is collected via USGS sensors and reported via satellite communications on average every 15-minutes. All USGS-available rivers are selectable and organized per state. All data is dynamic - when the USGS adds or subtracts reporting data or river systems within a state, the information is relayed to the app via our servers that acquire, construct, and manage the data - the app is always up-to-date.