By May 1, 2017, in time for harmful algal bloom season, a new feature will appear on California's Harmful Algal Bloom portal (http://www.mywaterquality.ca.gov/habs/) that displays satellite imagery designed to detect emerging and historical blooms. Using data and algorithms provided by NOAA's National Centers for Coastal Ocean Science, the San Francisco Estuary Institute developed a new tool under the guidance of California's Bio-accumulation Oversight Group.