Squalls still impacting Ontario's snowbelts, with further travel delays
Snow squall warnings still ongoing across parts of Ontario, with additional, local accumulations of 5-10 cm expected through Wednesday
A stubborn and slow moving low will continue to bring flurries and lake-effect snow to parts of southern and northern Ontario on Wednesday.
With most of the Great Lakes free of ice, the warmer surface water continues to provide instability to sustain low-pressure systems, keeping them borderline stationary.
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Expect slower, slippery commutes again for some of the snowbelt areas on Wednesday, even with the lighter amounts expected. The heaviest snow will continue to impact regions off of Lake Huron and Georgian Bay, with an additional 5-10 cm of snow expected.
Drivers are urged to prepare for quickly changing and deteriorating travel conditions.
More tricky travel with ongoing squalls through Wednesday
The lake-effect snow will gradually taper in intensity through the day on Wednesday, with an additional 5-10 cm for some areas by the time it wraps up.
The worst impacts will be largely in the snowbelts, where travel will be locally challenging.
"Snow squalls cause weather conditions to vary considerably; changes from clear skies to heavy snow within just a few kilometres are common," says ECCC in the snow squall warning. "Rapidly accumulating snow could make travel difficult over some locations."
Winds will also be gusty, reaching 20-40 km/h through the day on Wednesday.
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That will be ahead of a weak clipper system that will track across the south, bringing some light snow and a gusty wind on Thursday. A dusting to 3 cm of snow is expected across the GTA with this clipper.
__Polar vortex to send temperatures plummeting again __
Frigid Arctic air is expected for Sunday and most of next week, with the coldest conditions of the season, which could include negative double-digit high temperatures for a couple days, and wind chills in the minus 20s, and possibly minus 30s.
Colder-than-normal temperatures are expected to continue into the final week of January. As we approach the beginning of February, and progress through the first half of the month, much milder air will surge north into the eastern U.S. and attempt to push north of the border into the region. This will bring a milder pattern, but it is too early to know whether this will actually bring an extended period of early spring-like weather, or if this will bring messy storms with an active storm track across the region.
