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The river network summary map layer shows the combined forecast anomaly and uncertainty signal in a simplified way for each forecast lead time. The lead time is calendar weekly (always Monday to Sunday, with the weekly average river discharge) in the sub-seasonal and monthly (always calendar month, with the monthly ( average river discharge across the whole month). The forecast signal is shown for all river pixels above a certain minimum catchment area (currently 50 km2 in EFAS and 250 km2 in GloFAS). Each of these river pixels are coloured coloured by the dominant anomaly category and the also by the uncertainty category. The definition of these is described here:
