Tornado outbreak

While there is no single agreed upon definition, generally more than six tornadoes in a day in the same region is considered a tornado outbreak. [ [http://amsglossary.allenpress.com/glossary/search?p=1&query=tornado+outbreak AMS Glossary ] ] A series of continuous or near continuous tornado outbreak days is a tornado outbreak sequence.

The largest tornado outbreak on record — with 148 tornadoes, most significantly including six F5 and 24 F4 tornadoes — occurred on April 3 - April 4, 1974 across the United States and Canada. It is dubbed the Super Outbreak.

See also

*List of tornadoes and tornado outbreaks

References

* Doswell, Charles A. III, et al (2006). "A Simple and Flexible Method for Ranking Severe Weather Events". "Weather and Forecasting", 21 (6).
* Edwards, Roger, Richard L. Thompson, Casey Crosbie, John A. Hart, and Charles A. Doswell III (2004). " [http://ams.confex.com/ams/11aram22sls/techprogram/paper_81342.htm Proposals for modernizing definitions of tornado and severe thunderstorm outbreaks] ". "22nd Conference on Severe Local Storms", American Meteorological Society.
* Forbes, Gregory S. (2006). " [http://ams.confex.com/ams/Annual2006/techprogram/paper_99383.htm Meteorological aspects of high-impact tornado outbreaks] ". "Symposium on the Challenges of Severe Convective Storms", American Meteorological Society.
* Galway, Joseph G. (1977). " [http://ams.allenpress.com/pdfserv/10.1175%2F1520-0493(1977)105%3C0477:SCAOTO%3E2.0.CO%3B2 Some Climatological Aspects of Tornado Outbreaks] ". "Monthly Weather Review", 105 (4).
* Grazulis, Thomas P. (1993). "Significant Tornadoes 1680-1991, A Chronology and Analysis of Events". The Tornado Project of Environmental Films. ISBN 1-879362-03-1
* Schneider, Russell, Harold E. Brooks, and Joseph T. Schaefer (2004). " [http://ams.confex.com/ams/11aram22sls/techprogram/paper_81933.htm Tornado Outbreak Day Sequences: historic events and climatology (1875-2003)] ". "22nd Conference on Severe Local Storms", American Meteorological Society.
* Schneider, Russell, Joseph T. Schaefer, and Harod E. Brooks (2004). " [http://ams.confex.com/ams/11aram22sls/techprogram/paper_82031.htm Tornado Outbreak Days: an updated and expanded climatology (1875-2003)] ". "22nd Conference on Severe Local Storms", American Meteorological Society.
* Thompson, Richard L. and M.D. Vescio (1998). "The Destruction Potential Index – a method for comparing tornado days". "19th Conference on Severe Local Storms", American Meteorological Society.
* Verbout, Stephanie M., Harold E. Brooks, Lance M. Leslie, David M. Schultz (2006). "Evolution of the U.S. Tornado Database: 1954-2003". "Weather and Forecasting", 21 (1).