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It is often taken for granted that forecasters cannot improve on the ENS.  But forecasters can manually intervene by using their experience for a certain location.. They can be guided by verification of previous events to correct tendencies of the ENS to over- or under-forecast probabilities.  These modifications are often appropriate at coastal locations or in mountainous regions.  This is because local effects may be significant and/or the grid point nearest to the location that is used for the meteogram may not be typical nor appropriate. 

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