Hail is a significant hazard in parts of Canada, causing damage to infrastructure and crops. It is of particular concern to the insurance industry, for which it is an important risk. Risk analysis begins with an understanding of hazard, and for this reason it is important to have an updated climatology of hail frequency in Canada.
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The last national hail climatology of Canada was based upon the 1951-80 time period. However, from 1977 to 1993, many more stations reported days with hail than prior to 1977. As a result, a more spatially detailed analysis is now possible.