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Index

Regional Snowfall Impact Scale (ReSIS)

Sample ReSIS Image

The National Climatic Data Center is producing a new regional snowfall index; the Regional Snowfall Impact Scale (ReSIS). Like the Northeast Snowfall Impact Scale (NESIS), ReSIS uses snowfall and population to create an index that puts snowstorms and their societal impacts into historical perspective. However ReSIS only uses snowfall and population information within a particular region collection of states) to calculate an index. NESIS uses snowfall and population information from the eastern two thirds of the United States and is therefore a quasi-national index. It is called Northeast" because some of the constants in the algorithm used to calculate NESIS are specifically calibrated to the northeast; a region with abundant snowfall and a large population. The constants in the ReSIS algorithms are specific to the region in which an index is being calculated. Therefore ReSIS is a true regional index.