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Small, medium, large: Three lows in southern Ontario's forecast

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By Dayna Vettese
Thursday, January 30, 2014, 10:04 AM

Active winter weather continues and it certainly look as though January will end active and the beginning of February will continue the trend.

Ontarians have been contending with frigid temperatures and terrible driving conditions due to gusty winds and blowing snow. 

Dufferin County declared a state of emergency  Wednesday due to the bad weather and county resources not being able to keep up with the snow, blowing snow and impassable roads.

ACTIVE WEATHER WATCH: Check out the latest in this photo gallery

I wish we had better news but it looks like we’ll have to keep rolling with the punches the next little while as a series of three low pressure systems to make their way across Ontario over the next seven days.

Let’s start with the first system.


Ontarians are certainly no strangers to clippers this year, and another one is on its way Thursday night into Friday morning.

As shown in the water vapour image below, a low centred on central Manitoba will join up with moisture in the southern Alberta and Montana region and that will be what moves through southern Ontario.

Water vapour image from Wednesday afternoon depicting moisture and low that will move through Ontario.

Water vapour image from Wednesday afternoon depicting moisture and low that will move through Ontario.

Snow will move its way across northern Ontario from the west, throughout the day Thursday, and then move east. Areas around Georgian Bay and the shores of Lake Huron will start to see the snow late afternoon on Thursday.

The Golden Horseshoe and through the Greater Toronto Area shouldn’t start to see the snow until the late evening hours. Eastern Ontario and southern Quebec will get into the snow Thursday overnight.

Now this snow shouldn’t amount to much -- we’re talking only a few centimetres for most areas and maybe a centimeter or two around the GTA. 

Current model solutions are suggesting the snow should be done by the Friday morning rush hour but if the snow lingers a bit longer, combined with some gusty winds blowing the snow around, the commute could be a hassle. 

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Snap shot of NAM's solution for Thursday night

Snap shot of NAM's solution for Thursday night

So this first system, the clipper, is more of a hassle at this point and we know for certain it will be all snow. The next system, however, is trickier with precipitation types. Let’s talk about system the second…


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Snow squalls result in multi-vehicle pileup near Napanee, Ont.

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