J-SCOPE forecast results for the model run beginning in April of 2023 are shown in the first figure. Each panel represents ensemble averaged anomalies of two month averages for the region. The panels directly under the anomaly plots depict the relative uncertainty from the ensemble for the same time periods.

For both waters off the Washington coast and waters off the Oregon coast, the forecast projects that 10-meter integrated chlorophyll will be slightly lower than climatology on the shelf and higher than climatological farther offshore at the beginning of the upwelling season (May-June). The forecast projects that 10-meter integrated chlorophyll will be slightly higher than climatology over most of the late upwelling season (July-August) with the Juan de Fuca Eddy region experiencing a high in the later portion of the upwelling season (July-August). The relative uncertainty is highest at the beginning of the forecast when chlorophyll levels are low and at the end of the forecast in the fall (November-December).

The uncertainty is caused by the differences between the three ensemble members wind forcing, see California Current Indicators.