Tornado

 HISTORICAL TORNADO-RELATED EVENTS

 BACKGROUND INFORMATION AND DATASETS FOR TORNADOES and TORNADO MAPS

8 items found.

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1.	Ontario tornado frequency: Average number of tornadoes per year per 10,000 km2, based on data from 1950-1979:  Screen display:(91 KB jpeg image) Download: Portable Network Graphics (.PNG 842 KB)  Source: Newark, 1983
2.	Total number of tornado occurrences grouped by Environment Canada public forecast regions, based on data from 1979-2004:  Screen display:(48 KB png image) Download: (244 KB printable pdf image)  Source: Environment Canada, 2009c.
3.	All confirmed and probable tornadoes plotted by location, based on data from 1918-2004 (Provincial Overview):  Screen display:(72 KB png image) Download: (720 KB printable pdf image)  Source: Environment Canada, 2009c.
4.	All confirmed and probable tornadoes plotted by location, based on data from 1918-2004 (Southern Ontario):  Screen display:(160 KB png image) Download: (452 KB printable pdf image)  Source: Environment Canada, 2009c.
5.	All confirmed and probable weak (F0 and F1) tornadoes plotted by location, based on data from 1918-2004 (Southern Ontario):  Screen display:(252 KB png image) Download: (448 KB printable pdf image)  Source: Environment Canada, 2009c.
6.	All confirmed and probable significant (F2, F3 and F4) tornadoes plotted by location, based on data from 1918-2004 (Southern Ontario):  Screen display:(240 KB png image) Download: (336 KB printable pdf image)  Source: Environment Canada, 2009c.
7.	Year of Confirmed and Probable Tornado Occurrence (1918-2004) (Provincial Overview):  Screen display:(180 KB png image) Download: (332 KB printable pdf image)  Source: Environment Canada, 2009c.
8.	Year of Confirmed and Probable Tornado Occurrence (1918-2004) (Southern Ontario):  Screen display:(268 KB png image) Download: (448 KB printable pdf image)  Source: Environment Canada, 2009c.

Sources

Environment Canada, 2009c.	Environment Canada, 2009c. Internal. Data provided courtesy of David Sills, Meteorological Research Branch, Meteorological Service of Canada.
Newark, 1983	Newark, M.J., 1983. Tornadoes in Canada for the Period 1950 to 1979. Environment Canada, Atmospheric Environment Service, CLI-2-83, Downsview, Ont.

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