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• Strike probability chart.  This is the probability (in %) that a tropical cyclone will pass within a 300 km radius from a given location and within the 7-day time window.   The charts are based on the number of sub-seasonal range ensemble members that predict a tropical cyclone, each member having equal weight.   It is similar to the tropical cyclone activity charts produced for the medium-range forecasts.  
• Probability anomaly chart.  This shows whether the strike probabilities are higher (red shading) or lower (blue shading) than probabilities within a 20-year model climatology within the same 7-day time window.  They are computed by subtracting the model climatological probabilities from the real-time forecast probabilities.  Mean anomalies of probability are shown by the scale.
• Model sub-seasonal range climate charts (ER-M-climate) show weekly mean strike probabilities (in %) within the same 7-day time window.

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