Severe Storms and Extreme Events - Data Table

Storm Events Database

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Severe events have the potential to damage life and property. National Weather Service observers keep a comprehensive record describing 48 different types of severe events, from localized thunderstorms, tornadoes, and flash floods to regional events such as hurricanes, derechos, and winter storms.

How were these data collected?

These data are collected by the National Weather Service. Weather offices detect events using insturments and visual observations, and they also receive information from storm spotters—people who call in to report severe events. Tornadoes, high wind speeds, and storm cell data are collected with radar.

Events in this official NOAA database are selected based upon the following criteria:

  • Storm has sufficient intensity to cause loss of life, injuries, significant property damage, and/or disruption to commerce. 
  • Storm event contains rare, unusual, weather phenomena or significant meteorological events, such as extreme temperature.