The calculate Climatological Forecast option analyzes the storm's current movement and all "similar" storms in the historical database to compute a blended climatological forecast track.  The historical database is analyzed for every forecast position to determine the next forecast position.  This is iterated (repeated) 14 times to compute a 120 hour forecast  track.  When the forecast calculation is complete, forecast comments are displayed along with forecasted positions, number of similar storms found and whether the comparison criteria needed to be expanded to include a larger sample of storms..

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NOTE:  The Climatological forecast is based solely on the historical database information.  Movement of past storms, while sometimes a good predictor of the movement of a current storm, should not be relied upon.