An early April chill will allow colder air from Northern Canada to funnel into much of the continent of North American and provide one residual and last remnant shot of winter; significant accumulating snow April 4th (Night) through April 5th is likely, especially for some regions.
We have prepared a risk map outlining the potential for significant snow (deemed in this case a minimum of 5cm or more), across Southern, Eastern, Central and Northern Ontario, as well as parts of Southern Quebec and the Townships.
At this point, it seems most of the coldest air should remain north of the 401, alongside the higher moisture content; most of the heaviest snow will reside around Cottage Country and near Lake Superior/Northern Ontario.
At this time, the 401 corridor with the exception of regions near Lake Erie, can except a swath of 5-10cm, while regions north of the 401 (and Quebec) can expect 8-12cm, locally 15cm, and regions in Cottage Country, Northern Ontario and Lake Superior region can expect 15-20cm+.
Inevitable = >90%
Very High Chance = 80%+
High Chance = 70%+
Moderate Chance = 50%+
Slight Chance = 30%+
Minimal Chance = 10%+
When will the cold relinquish?
As recently predicted and outlined in our Spring/Summer forecast, it is [and we expect] Spring to be relatively cool across much of Eastern Canada with above normal precipitation. However, we do believe more moderating temperatures will begin to enter the Eastern half of the country beginning very late April, and more prominently into early May.
Please stay tuned, as we at TCW are monitoring this situation attentively.
Drive safe and always be alert during winter conditions.
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