THE REGIONAL SNOWFALL INDEX

This paper describes a new snowfall index that quantifies the impact of snowstorms within six climate regions in the United States. The regional snowfall index (RSI) is based on the spatial extent of snowfall accumulation, the amount of snowfall, and the juxtaposition of these elements with populati...

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Veröffentlicht in:Bulletin of the American Meteorological Society 2014-12, Vol.95 (12), p.1835-1848
Hauptverfasser: Squires, Michael F., Lawrimore, Jay H., Heim, Richard R., Robinson, David A., Gerbush, Mathieu R., Estilow, Thomas W.
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container_end_page 1848
container_issue 12
container_start_page 1835
container_title Bulletin of the American Meteorological Society
container_volume 95
creator Squires, Michael F.
Lawrimore, Jay H.
Heim, Richard R.
Robinson, David A.
Gerbush, Mathieu R.
Estilow, Thomas W.
description This paper describes a new snowfall index that quantifies the impact of snowstorms within six climate regions in the United States. The regional snowfall index (RSI) is based on the spatial extent of snowfall accumulation, the amount of snowfall, and the juxtaposition of these elements with population. Including population information provides a measure of the societal susceptibility for each region. The RSI is an evolution of the Northeast snowfall impact scale (NESIS), which NOAA’s National Climatic Data Center began producing operationally in 2006. While NESIS was developed for storms that had a major impact in the Northeast, it includes all snowfall during the lifetime of a storm across the United States and as such can be thought of as a quasi-national index that is calibrated to Northeast snowstorms. By contrast, the RSI is a regional index calibrated to specific regions using only the snow that falls within that region. This paper describes the methodology used to compute the RSI, which requires region-specific parameters and thresholds, and its application within six climate regions in the eastern two-thirds of the nation. The process used to select the region-specific parameters and thresholds is explained. The new index has been calculated for over 580 snowstorms that occurred between 1900 and 2013 providing a century-scale historical perspective for these snowstorms. The RSI is computed for category 1 or greater storms in near–real time, usually a day after the storm has ended.
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source AMS Journals (American Meteorological Society); JSTOR; EZB Electronic Journals Library
subjects Climate models
Climatic zones
Colleges & universities
Insured losses
Meteorology
Meteors
Population density
Population mean
School closures
Snow
Snowstorms
Storms
title THE REGIONAL SNOWFALL INDEX
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