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The first major component is the hydrological forecasts produced in real time. This will give gives the actual predicted conditions for the sub-seasonal and seasonal products that will to be compared to the climatologies to derive the forecast anomaly and uncertainty. The characteristics of the real time forecast simulations are described below. Where appropriate, the difference between EFAS/GloFAS and sub-seasonal/seasonal is specified. If there is no EFAS/GloFAS or sub-seasonal/seasonal mentioned, then the method is identical between the systems:
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