Tornado data for southern Ontario

[DarkSky]

Good graphical maps showing tornado frequency for areas of southern Ontario : http://ontario.hazards.ca/search/search-e.html?user=H&who=O&class[]=140

Ontario tornado frequency: Average number of tornadoes per year per 10,000 km², based on data from 1950-1979:

http://www.ontariostorms.com/attachment.php?attachmentid=5025&d=1305303355

[DarkSky]

Total number of tornado occurrences grouped by Environment Canada public forecast regions, based on data from 1979-2004:

http://www.ontariostorms.com/attachment.php?attachmentid=5026&d=1305303468

[DarkSky]

All confirmed and probable tornadoes plotted by location, based on data from 1918-2009 (Southern Ontario) :

http://www.ontariostorms.com/attachment.php?attachmentid=5027&stc=1&d=1305304462