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In operational environments, when output from several NWP models or ensembles are available, forecaster analysis of tropical cyclone forecasts is viable only when the information on position and intensity of tropical cyclones is displayed in a compact and easy-to-understand format.  The ECMWF tropical cyclone forecast products are designed to clearly provide both deterministic and probabilistic information on the movement and intensity of individual tropical cyclones after post-processing of IFS forecast data at 6 hour intervals.  This also helps with the objective verification of tropical cyclone forecasts, and can also help with highlighting unreliable aspects. IFS model analyses of tropical cyclones rely on observed data alone - there is no artificial scheme, such as vortex bogusing, for arbitraraly arbitrarily defining the structure of the modelled tropical cyclone.

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