NOAA’s flood mapping tool now covers nearly 100% of U.S.

NOAA’s flood mapping tool now covers nearly 100% of U.S. Experimental Flood Inundation Mapping provides valuable guidance for decision-makers and public September 24, 2026 NOAA’s flood inundation map (left) depicting the forecast for flooding extent in New London, Wisconsin, and a photo of flooded streets in New London (right), dated April 17, 2026. (Image credit: NOAA NWS) Download Image NOAA’s National Weather Service announced today that Flood Inundation Mapping (FIM), a revolutionary tool for predicting river flooding, is now available on an experimental basis to nearly 100% of the U.S.