NOAA NCEI Storm Events Database

Open files classify Thunderstorm Wind and High Wind events and carry begin/end time and linked locations. MAGNITUDE and MAGNITUDE_TYPE distinguish estimated or measured gust and sustained-wind values; reporting source, modification/certification timestamps, and dated release pin the answer. This is reported/certified evidence, not a radar footprint.

Open event-detail and location files identify NWS-documented Hail events by event/episode id, begin/end time, and linked locations. MAGNITUDE records maximum reported hail size in inches; reporting source, modification/certification timestamps, and dated release pin the answer. This is reported/certified evidence, not a radar-estimated swath.

Open files provide NWS-documented Flood and Flash Flood events with begin/end times, event/episode identity, flood cause, and linked location points. NWS guidance uses reference points to outline affected areas; release and modification/certification dates pin the record. This is reported flood-occurrence evidence, not measured or satellite-derived inundation geometry or depth.

Open hail records supply type, time, linked location, reporter, and maximum reported hail size, supporting report-based climatology with explicit denominator and bias.

Thunderstorm Wind records carry locations, dates, magnitude, and qualifiers for measured/estimated gust/sustained values, supporting thresholded report climatology.

Open NWS Flood and Flash Flood records supply time, event identity, cause, linked locations, reporting source, and revisions, supporting reported occurrence patterns but not inundation depth or probability.

Storm Data admits Wildfire for significant forest, grassland, rangeland, and wildland-urban-interface fires and defines beginning/ending times. Bulk event/location records carry identity, linked location, reporting source, and modification/certification dates. Coverage is limited to qualifying significant wildfires and is not a general structural-fire census.

Open event/location files support tornado occurrence counts by area/window; no tornado-intensity scalar is claimed from the current Feature inventory.