"A blizzard is defined by the U.S. National Weather Service as winds over 16 m s?1 [35 mph] and falling or blowing snow causing visibility less than 400 m lasting for at least 3 h". (Schwartz and Schmidlin, Climatology of Blizzards, July 2002)
B. Wayne Blanchard, Guide To Emergency Management and Related Terms, Definitions, Concepts, Acronyms, Organizations, Programs, Guidance, Executive Orders & Legislation, A Tutorial on Emergency Management, Broadly Defined, Past and Present, B. Wayne Blanchard, USA 2007 (Last Modified 2008). http://training.fema.gov/EMIWeb/edu/docs/terms%20a nd%20definitions/Terms%20and%20Definitions.pdf, (Emr Mgt/ ND and Other Dzstr - Amer) {11}