As we get ready for Christmas and the storm approaching Southern Ontario, an even larger threat looms for parts of the snowbelts.

Much of Southern and Eastern Ontario are set for 5-10cm of snow Christmas Eve, parts of the GTA will see double that as a low pressure system moves south of the region. Behind this storm winds will switch into the WNW creating some epic lake effect snow bands. The first bands will form Monday (Christmas Day) across Grey and Northern Huron County and then SE of Georgian Bay. The bands will continue to strengthen as we head into Boxing Day and should continue right into the 27th or 28th. The temperatures will be cold enough (finally) to get some real action going. Finally we have access to real Siberian air which is going to make some of these bands quite juicy.

I am expecting that some of these bands will stall over regions for hours at a time creating some very impressive lake effect bands. Here is my critical zone, where I believe lies the potential for over 50cm of snow:

-Sauble Beach

-Bruce County

-Owen Sound


-Blue Mountains/Collingwood





If you live near these regions be on high alert. This type of pattern has yielded snow amounts in the 40-70cm+ zone several times in the past. Because of the duration of this event, the risk is real. These bands will be dropping 3-6cm per hour, and at times as much as 7-8cm per hour. Dec 26th and Dec 27th are both prime for very intense squalls. Here is my map of what I’m expecting.


Squalls Dec 25-27th.jpg