iPhone Giveaway of the Day - River Stages-USA

The River Stages App provide more than 10000 river gauges of the NWPS in USA.
First,you can check the information of each gauge, such as stage flow, stream flow. If available, also can view the PH,water temperature data which is provided by the USGS.
In addition, the App can view the observed stages or stages forecast of all gauges on map.
At last the App provide the observed quantitative precipitation map of last days in USA Conus and precipitation outlook image.