Critical fire weather conditions, severe thunderstorms capable of producing severe wind gusts, large hail, strong tornadoes and heavy rainfall remain on tap for the central U.S. this evening. Flash flooding is also possible for portions of the Plains and Mississippi Valley. Very large hail up to 3 inches in diameter will be possible this evening across western Kansas. Read More >
The data for these pages are decoded from the historical tornado data archive at the Storm Prediction Center. The only modifications to this data were supplemental location information from Storm Data and changes to information where a coding error was detected in the archive data files when compared to Storm Data, which is the official record of severe weather events, and is described in NOAA Tech Memo NWS SR-209 (Speheger, D., 2001: "Corrections to the Historic Tornado Database"). Tornado data before 1950 (where available) are from records kept at the National Weather Service Forecast Office in Norman, OK. The data can be accessed by using the drop-down menus or map above.
The tables contain the following information:
Note about tornadoes before 1950. Records from the National Weather Service Office in Norman were used to include Oklahoma tornadoes before 1950. Since much of this data was collected through research in the late 1940's and not recorded in real time, this pre-1950 list is known to be incomplete. This listing is not meant to document all probable tornadoes in the state (or territories) before 1950 or compete with more complete works such as "Significant Tornadoes 1680-1991" by Grazulis, but to list the tornadoes recorded in this office.