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Please note that these test products are not operationally supported, although ECMWF makes best efforts to ensure they are routinely available. These products should not be relied on for operational use.
Forecast trajectories from day 0 to day 8 in the NAO-BLO space. In the latest forecast the analysis for the previous 8 days is represented by a grey line. In the previous forecasts the available analysis is represented by a black line. The ensemble mean trajectories are in red. Title shows initial date and time of ENS forecast; coloured markers show the ENS members at 24-hour intervals (see legend). EOF1: positive (right) and negative (left) phase of NAO; EOF2: blocking (top), "anti-blocking" (bottom)
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now operational and are available here: https://apps.ecmwf.int/webapps/opencharts/products/medium-trajectories