How is NOAA studying humidity?

The National Oceanic and Atmospheric Administration, or NOAA, measures water vapor with its Geostationary Operational Environmental Satellites (GOES) satellites in several ways. For example, NOAA uses a measure called total precipitable water (TPW) to provide information to weather forecasters and hydrologists (scientists who study the waters of the Earth and atmosphere). This information helps improve forecasting for events such as heavy rain, flash flooding, and more.