The U.S. Government is closed. This site will not be updated; however NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit www.commerce.gov. For the latest forecast and critical weather information, visit www.weather.gov. 

The U.S. government is closed. This site will not be updated; however, NOAA websites and social media channels necessary to protect lives and property will be maintained. To learn more, visit commerce.gov. 

For the latest forecasts and critical weather information, visit weather.gov.

Lake Erie harmful algal bloom update: the cyanobacteria bloom intensified last week

Current Lake Erie Sentinel-3 satellite imagery from the Ocean and Land Color Imager (OLCI) on Aug 07, 2025, showing bloom location and extent in the western basin.Lake Erie harmful algal bloom update: The cyanobacteria bloom intensified last week. With southerly winds, it has extended from Maumee Bay along the Michigan coast past Monroe, and more into open water eastward to West Sister Island, OH.  Check out the forecast for changes in position with changes in wind direction: https://coastalscience.noaa.gov/science-areas/habs/hab-forecasts/lake-erie/