Flooding is the most frequent severe-weather related threat and the costliest natural disaster in the United States. To improve flood warning communication and help emergency managers prepare for and respond to flooding, the National Weather Service (NWS) has begun to add new experimental flood inundation mapping services to its suite of forecast products. These new services complement and support the issuance of flood watches and warnings by providing near-real-time, high-resolution, street-level visualizations showing where, when, and how much flood waters are forecast.
