20250507 09465600 1.0 TRUE Severe Storms 2002-2019 Severe Storms 2002-2019 Average Annual Frequency About this map: This depiction of severe storm hazard across Puerto Rico uses Iowa State University’s Environmental Mesonet data – an archive of environmental data from cooperating member observing networks. The hexagonal grids utilized here provide a standardized method for overlaying multiple hazards each with different spatial representations. Average annual severe thunderstorm warnings issued (2002-2019) is calculated for each hexagonal grid, representing 0.5 sq. miles, and symbolized using an equal interval classification scale. Spatial analytics derived by the vulnerability mapping and analysis platform at the university of Central Florida – www.vulnerabilitymap.org