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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.

Top 10 of 2025 | In July, our Lake Erie hypoxia forecast models detected low to no oxygen

screen grab of two maps from hypoxia forecast, top map shows surface temperature and bottom map shows dissolved oxygen concentrationTop 10 of 2025 | In July, our Lake Erie hypoxia forecast models detected low to no oxygen in the western basin of the lake. NOAA’s forecast gave drinking water managers early warning so they were prepared to respond if needed.

Between July 3 and September 30, NCCOS issued 10 hypoxia alerts for Lake Erie. Eight of these were for the Ohio coast, and two specifically for Canada. This is the first year that hypoxia alerts were issued to support public water suppliers along the Canadian central basin.