NOAA Western Lake Erie HAB Seasonal Forecast 2025

Western Lake Erie Harmful Algal Bloom Seasonal Forecast

Provided by NOAA's National Centers for Coastal Ocean Science (NCCOS)

This bulletin provides the seasonal forecast of the Microcystis harmful algal bloom (HAB) in western Lake Erie for 2025.

To view the Bulletin, click here or on the image below.

Following the 2024 Microcystis bloom, we reprocessed the satellite remote sensing time series used to monitor the severity and impacts of annually occurring cyanobacteria (Microcystis) HABs. The satellite reprocessing included new calibrations and improved algorithms, generating a more consistent data set for HAB monitoring in Lake Erie. You can find more information about the updated time series here. In addition, Ohio Sea Grant hosted a webinar on the time series update (recorded presentation here).

Click here to view more information and links about NOAA's Lake Erie and HAB Forecasting

Health Information:

For HAB safety information, please visit Ohio EPA
For current HAB conditions at Lake Erie Beaches, please visit Ohio DOH BeachGuard

Additional HAB monitoring and forecasts:

NOAA NCCOS HAB Monitoring System
NOAA NCCOS HAB Forecasting
NOAA GLERL Great Lakes Water Quality and Buoy Data

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