Monday, February 20, 2017
The big melt is on across southern Quebec
High pressure will give Montreal a chilly night Monday, before warm southwest winds develop on Tuesday. A weak warm front will produce a few showers on Tuesday evening. Wednesday will be very mild again, with temperatures approaching 10C (50F) across the region. The warmth will remain into Thursday. The normal high in Montreal for late February should be -3C (27F), with overnight lows of -12C (10F).
Too early to celebrate spring
Despite the early taste of spring, much colder air is forecast to move into Montreal by next weekend, with rain changing to snow on Saturday. The precipitation will be generated by a rather vigorous low-pressure area moving across the central Great Lakes. Rain will develop early Saturday and change to wet snow before ending Sunday. A strong cold front will produce a rapid drop in temperature Saturday night. This system will need to be monitored closely. The potential exists for a flash freeze and significant snowfall for some regions of southern Quebec late Saturday.