Storms from IBTrACS that achieved a rating of at least 4 on the Saffir-Simpson wind scale classification. This layer is filtered to show category H5 storms in the Eastern Pacific and North Atlantic basins, and H4 & H5 storms in other basins. The IBTrACS data includes storms from 1842 to 2015, though this filtered layer only contains storms included from 1924 to 2014. Data source: IBTrACS v03r07 accessed from NCDC on 12/22/2015. Knapp, K. R., M. C. Kruk, D. H. Levinson, H. J. Diamond, and C. J. Neumann, 2010: The International Best Track Archive for Climate Stewardship (IBTrACS): Unifying tropical cyclone best track data. Bulletin of the American Meteorological Society, 91, 363-376. non-gonvernment domain doi:10.1175/2009BAMS2755.1