Special Weather Statements for Ontario,

Today..Isolated thunderstorms are likely across Southern Ontario. 
There is a slight risk that some of these thunderstorms may be
Severe over the southwest due to torrential downpours, large hail
And damaging winds this afternoon. Isolated thunderstorms are 
possible over Northern Ontario.  Some of these thunderstorms may  

approach severe limits due to wind and hail.http://weather.gc.ca/warnings/SWS_bulletins_e.html?prov=onAny source