SPC Severe Weather Database

The official open 1950–2025 tornado archive supplies dates/times, F/EF magnitude, start/end coordinates, path dimensions, jurisdiction keys, segment controls, and raw versus de-segmented tracks with dated release and rating-era caveats. Synthetic GIS endpoints are not observed extent.

SPC's standing public severe-weather database and SVRGIS files provide U.S. tornado occurrence time, start/end coordinates, actual-track and segmented representations, F/EF magnitude, path length and width, dated archive releases, and documented synthetic-endpoint caveats. This directly answers where and when a tornado travelled and what reported intensity/path dimensions were recorded; it is not a complete census or proof of building impact.

For a date/time-identified event, SPC wind rows provide reported coordinates, time, knot-valued magnitude, and measured/estimated gust/sustained qualifier with dated archive release. They do not establish continuous footprint or building impact.

For a date/time-identified event, SPC hail rows provide reported occurrence coordinates, time, and hail diameter, with archive release pinning record vintage. They support reported locations rather than a continuous swath, affected boundary, or building-impact match.

The open 1955–2025 hail archive supplies report date/time, coordinates, jurisdiction keys, and hail diameter with a dated release. It supports thresholded area/window counts and severity distributions when boundary, denominator, reporting bias, and aggregation are retained; it is not a complete census or emitted grid.

The open 1955–2025 damaging-wind archive supplies report date/time, coordinates, jurisdiction keys, knot-valued magnitude, and measured/estimated gust/sustained qualifier. It supports thresholded area/window frequency and severity with denominator, bias, and release retained; it is not a continuous wind field.