The National Oceanic and Atmospheric Association (NOAA)'s Hydrologic Information Center provides this page on Current Hydrologic Conditions across the US. Categorized into seven sections, the site offers daily information on floods, river/ streamflow conditions, drought, soil moisture, snow conditions, water supply, and meterological outlooks. The depth of each daily summary/ forecast varies by...

The Global Hydrology Resource Center (GHRC) of the National Aeronautics and Space Administration provides data ingest, archive, and distribution services for the Global Hydrology and Climate Center (GHCC). Eight categories of online data are available to download using FTP. These include MSFC SSM/I Brightness Temperature, MSFC SSM/I Daily Gridded Products, and MSU Daily/Monthly Anomalies/Annual...