A computer-based method of formulating and delivering dynamic, severity-based weather peril scoring includes ingesting human-observed weather data and radar weather data, applying a grid that has a plurality of cells to a map of a geographical region to divide the geographical region into a plurality of areas, with each area being defined by a corresponding one of the grid cells, for each area/grid cell: calculating, with a computer-based processor, a first severity-weighted risk index for at least one weather peril based on the human-observed weather data, calculating, with the computer-based processor, a second severity-weighted risk index for the at least one weather peril based on the radar weather data, and blending, with the computer-based processor, the first severity-weighted risk index and the second severity-weighted risk index to produce a blended risk index.