GMAO Science Snapshot: GEOS-S2S Predicted 2020 Summertime Precipitation Anomalies Three Months in Advance

The Goddard Earth Observing System Subseasonal to Seasonal Prediction System, Version 2 (GEOS-S2S-V2) — running at the NASA Center for Climate Simulation (NCCS) — forecasted a persistent negative precipitation anomaly on the west coast three months ahead of time and with high probability.

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Observed (left) and model (right) precipitation anomaly for June, July, and August from the March forecast