Cyanobacteria forecast results from 2021-2023 for 2,192 satellite resolvable lakes. This dataset is associated with the following publication: Meyers, K., B. Schaeffer, O. Cronin Golomb, W. Salls, D. Benkendorf, G. Serenbetz, and M. Coffer. National forecasting of cyanobacterial harmful algal bloom events: a three-year model evaluation. LAKE AND RESERVOIR MANAGEMENT. Taylor & Francis Group, London, UK, 41(4): 261-269, (2026).