List of Storm Prediction Center high risk days

This is a list of real-life SPC high risk days up to 2017, after 2017 is all hypothetical.

A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. High risks are issued only a few times a year when forecasters at the SPC are confident that a major severe weather outbreak, namely tornadoes and occasionally derechoes, will occur on the given day. These are typically reserved for the most extreme events.

Limited details are available for days before the late 1990s, and it is probable that there were additional high risk days with no online documentation, especially in the 1980s.