NOAA MRMS hail data, converted into ranked storm inventory

HailLeads uses NOAA Multi-Radar Multi-Sensor (MRMS) hail analysis to identify where damaging hail likely occurred, then converts the storm footprint into two separate ranked products: addresses and raster cells.

NOAA MRMS is a national radar-derived product from NSSL and the National Weather Service. HailLeads uses the MRMS Maximum Estimated Size of Hail grid and retains cells where estimated hail size is at least 0.75 inches.

The backend extracts qualifying MRMS raster cells, clips them to the storm geometry, and stores the intersecting hail swath as a structured storm footprint tied to the event time.

Candidate properties from the Overture dataset are spatially intersected with the hail swath. Addresses inside qualifying hail cells are retained and ranked by hail intensity and local spatial position within the storm core.

Raster-cell inventory exposes the MRMS hail grid directly. Cells are ranked by hail size and local neighboring support, preserving the highest-confidence radar-derived hail locations inside the storm swath.