Keeping an eye on the sharp cold front which will push eastwards into southern ontario on the 13th. Some backend snow may be possible across southern ontario if the cold air pushes southwards quickly enough. The cold front positioning is easily identified and a sharp temperature drop will occur. Above normal temps will be the strongest in advance of this cold front and the next one that will cut up to the great lakes around the 17th. Short, quick burst of warmth before a return to move seasonal values will occur in this negative PNA pattern with the energy dumping into the west and cold air modifying as it progresses eastwards.