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’s summer harmful algal bloom season came to an end in late October

The maximum bloom severity in 2024 vs 2025.Lake Erie’s summer harmful algal bloom season came to an end in late October, and NOAA and partners have issued the final bulletin. The 2025 western #LakeErie cyanobacterial bloom had a severity index of 2.4, which is considered a mild bloom, and less intense that 2024.