This page describes the way the anomaly and uncertainty of the ensemble forecasts in the sub-seasonal and seasonal products are is determined using the climatology as reference. This includes also how the forecast anomaly category (the 'dominant' of the 7 predefined ones) and the uncertainty category (of the 3 predefined ones) of the ensemble forecasts are determined. This is a generic procedure, which is the same for both EFAS and GloFAS, as it is executed the same way for each river pixel, regardless of the resolution, and also the same for the sub-seasonal and seasonal products, as it works in the exact same way regardless of whether it is weekly mean values, as in the sub-seasonal, or monthly mean values, as in the seasonal.
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