A swath of accumulating snow courtesy of a system that is expected to move across Northern Ontario during the day on Wednesday. However, the extent of this snow and the exact locations impacted remains unclear.
Inclement weather isn’t currently expected in the forecasted region on this day.
A fairly weak system will sweep across Northeastern Ontario and into parts of Central Ontario during the day on Tuesday and into the evening. Not much accumulation is expected with maybe a few centimetres of fresh snow. However, there is some indication that the system could be enhanced by Georgian Bay bringing slightly higher totals through the Muskoka, Parry Sound and Algonquin Park area. Accumulation here could range from 5-10cm with most of the snow coming later in the day and especially during the evening hours. A few localized spots may pick up 15cm if we see really organized lake effect bands developing within the system snow, but it doesn’t seem likely.
The rest of Southern Ontario will see snow throughout the day on Tuesday with a focus on the morning for Southwestern Ontario and later in the day for Eastern Ontario. At this point, we don’t believe anyone outside of the areas east of Georgian Bay will see more than 5cm so we have not included that accumulation in the outlook. Just keep in mind that you should expect some winter weather conditions everywhere, but it won’t be very impactful.
Lake effect snow and snow squalls may develop off Lake Huron and Georgian Bay through Tuesday. However, there is low confidence in the areas impacted and exactly how much snow is possible at this point.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
An overperforming system brought widespread snowfall accumulation throughout parts of Southern Ontario on Sunday with totals ranging from 5-20cm depending on the location. The snow has tapered off this evening, but some lake effect snow and localized squalls continue southeast of Lake Huron. This may result in some bus cancellations in the region around London and Sarnia for Monday morning due to blowing snow and reduced visibility although it won’t be overly strong. As such, we’ve given this area a 50% chance of a snow day with the cities of London and Sarnia having a 25% chance of a snow day.
The rest of the regions in Southern Ontario that saw snow on Sunday has a 5-10% chance of seeing bus cancellations as we believe that road conditions should be fine by morning since there will be plenty of time for road crews to clean everything up. However, a few rural roads may still be snow-covered so we can’t completely rule out a snow day in a few school boards, but it’s hard to pinpoint which boards will have the best chance as it’ll depend on local road conditions.
If there are any cancellations tomorrow morning, you can be sure we’ll be up bright and early beginning at 6 AM with our bus cancellations live blog to keep you updated.
Disclaimer: Instant Weather has zero authority when it comes to bus and school closures. It is completely up to the school boards, bus companies, and local authorities as well as being up to parents to decide what is best for their children. This is simply our best guess based on our forecast. Also note that due to the current pandemic, some school boards have changed their policies on school bus cancellations. Some will continue the school day in a virtual format should there be school bus cancellations - check with your local board for more details.
Inclement weather isn’t currently expected in the forecasted region on this day.
A system currently bringing accumulating snowfall to parts of Southwestern Ontario during the evening on Saturday is expected to merge with a system over Northern Ontario as it drops southward across Southern Ontario. This will spread light to moderate steady snowfall through areas east of Lake Huron and into the Golden Horseshoe during the morning on Sunday and continuing into the afternoon.
Accumulation won’t be overly significant with general amounts ranging from 5-10cm (although a few pockets could pick up slightly higher amounts if we see some lake enhancement) by the end of Sunday when the snow is expected to taper off. Regardless, this will likely be the largest snowfall much of the GTA and surrounding regions outside of the snowbelt have seen this season thus far. If you’re travelling on Sunday, leave plenty of time to get to your destination as roads will likely be slushy or snow-covered.
Accumulating snow is possible through parts of Southwestern Ontario and into the GTA as some light to moderate snowfall and lake effect snow moves through the area. However, the areas affected and exactly how much snow is possible remains unclear at this point.
Inclement weather isn’t currently expected in the forecasted region on this day.
A fast-moving system will sweep across Extreme Southwestern Ontario during the afternoon on Saturday and continue through the evening. This will bring the first accumulating snowfall of the season to locations such as Windsor, Sarnia and Chatham. General snowfall accumulation between 4-8cm is possible with locally up to 10cm, but it’s unlikely many areas will see this. The snowfall will taper off just after midnight as the system moves over Upstate New York. Additional snowfall is possible on Sunday with another system which will be covered in Sunday’s outlook if necessary.
Snow squalls are expected to develop off Lake Huron and Georgian Bay early Friday morning and continue throughout the day. With reduced visibility and rapid snowfall accumulation, it’s possible that we may see some bus cancellations for London, Goderich, Kincardine, Owen Sound and Collingwood. Now the squalls won’t be super strong so we’ve gone with a 50% probability of a snow day. Surrounding regions have a 10-25% chance of a snow day.
Also, it seems that the school boards in this region are particularly less sensitive to inclement weather and more likely to roll the dice on not cancelling the buses so we’ve accounted for this with a lower probability. Even though based on the weather conditions, we believe they should be cancellated as travel during the morning and afternoon will be quite difficult in the affected regions.
Another area further north through the North Bay, Pembroke and Bancroft area may also see some cancellations due to some heavy system-related snowfall along with icy road conditions as temperatures will drop well below the freezing mark early in the morning.
If there are any cancellations tomorrow morning, you can be sure we’ll be up bright and early beginning at 6 AM with our bus cancellations live blog to keep you updated.
Disclaimer: Instant Weather has zero authority when it comes to bus and school closures. It is completely up to the school boards, bus companies, and local authorities as well as being up to parents to decide what is best for their children. This is simply our best guess based on our forecast. Also note that due to the current pandemic, some school boards have changed their policies on school bus cancellations. Some will continue the school day in a virtual format should there be school bus cancellations - check with your local board for more details.
Inclement weather isn’t currently expected in the forecasted region on this day.
A weak system that has been bringing scattered showers to parts of Southern Ontario throughout the day on Thursday is expected to linger into Friday. However, some of the coldest air of the season will flow into the region overnight and early Friday morning which will drop temperatures to well under the freezing mark. This will allow for the rain showers to transition over to wet flurries and light snowfall.
This system is lacking in terms of moisture so significant accumulation isn’t expected outside of the snowbelt except for higher elevations of Central/Eastern Ontario. Some icy road conditions can also be expected during the morning commute on Friday due to the sharp drop in temperatures and earlier rainfall. But the drop isn’t significant enough to be considered a flash freeze.
As for the areas that will see the highest totals, this will be those along the Lake Huron and Georgian Bay shorelines as lake enhancement and embedded snow squalls will help boost the totals above the general system snowfall. The focus will be on areas southwest of the lakes including Goderich, London, Collingwood and Angus where between 10-15cm of snowfall is possible and maybe locally as much as 20cm by the end of Friday.
Further north, more moisture across Algonquin Park and into the Ottawa Valley will allow for snowfall accumulation of between 10-15cm in the higher elevations and around 5-10cm for other areas. Aside from those regions, the rest of Southern Ontario is expecting to see less than 5cm of accumulation on Friday. The snow will come to an end late Friday.
Snow squalls may yet again impacts areas around Georgian Bay and Lake Huron with a focus on those regions southeast of the lakes. This includes Barrie, Collingwood, Angus, Goderich, Stratford, London and Grand Bend where locally up to 15-25cm of snowfall accumulation by the end of Friday when the squalls weaken. A map for this event will be issued on Thursday once the affected regions are more clear.
Another area extending from Algonquin Park through the Ottawa Valley may see snowfall accumulation between 5-10cm as a weak system swings through their early Friday. Although some models suggest the heavier snow will stay in Northeastern Ontario and over Quebec so we are waiting to issue a map.
An area of moderate to heavy persistent snowfall will move across Northeastern Ontario starting in the afternoon on Thursday and continue through to Friday morning. It will also be accompanied by some strong wind gusts between 40-60km/h which may result in localized blowing snow and near-zero visibility out on the roads The hardest-hit area appears to be the region just to the southwest of the Quebec border including Sudbury, Englehart and Timmins where total accumulation between 10-15cm is expected by early Friday morning. A few localized spots may pick up slightly more than 15cm. Outside of this zone, the rest of Northeastern Ontario will see around 5-10cm of snow. As mentioned, the snow will taper off by noon on Friday.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
Inclement weather isn’t currently expected in the forecasted region on this day.
