Thursday, July 18, 2019

Lake Erie Harmful Algal Bloom

NOAA and its research partners predict that western Lake Erie will experience a harmful algal bloom (HAB) of cyanobacteria this summer that is larger than the mild bloom in 2018. Scientists expect this year’s bloom to measure greater than a 7 on the severity index. The severity index is based on a bloom’s biomass – the amount of its harmful algae – over a sustained period. The largest blooms, 2011 and 2015, were 10 and 10.5, respectively. Last year’s bloom had a severity of 3.6 considered a mild bloom. However, the size of a bloom is not necessarily an indication of how toxic it is. For more information on the projection click here.

NOAA HAB Forecast Bulletin

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