The US Geological Survey has a new online dashboard for their data which is going to be the ongoing major source of all USGS data. It also includes additional data from a number of other sources like the National Weather Service and is supposed to be more mobile-friendly than their previous web site. Brian McCallum of the USGS gave a 20-minute talk to the Metro Atlanta American Meteorological Society recently which is a tour of the new web site. You can view it here. Note that the dashboard is located at https://dashboard.waterdata.usgs.gov/app/nwd/?aoi=default.