Someone pointed out this resource to me a while ago and thought I'd pass it along to all of you. It's the USGS Waterwatch website.
What that means in English, is that you can go to the site and check the current water flows all across the country. Just click the interactive map and get magically whisked away to (wherever you clicked.) Then you hover over the small circles to get a pop-up of latest USGS data for that waterway.
Pretty cool, huh?
WaterWatch -- Maps and graphs of current water resources conditions