Day 2 - 3 Outlook

Valid: Sunday, November 10, 2019 - 12AM to Tuesday, November 12, 2019 - 12AM

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Forecast Discussion

Issued: Friday, November 8, 2019 - 11:15PM

Forecaster: Brennen Perry

A low-pressure system out of the US Midwest is expected to intensify as it approaches Southern Ontario early Monday morning spreading a swath of moderate to heavy snowfall across the region throughout the day on Monday. The snow will reach Eastern Ontario later in the day on Monday with some of the potential snowfall extending into the overnight hour. At this point, there is some uncertainty on how far north the system will track with some weather guidances suggesting that the heavy snowfall stays stateside through upstate New York. IF the storm continues with a similar track to what is the most consistent scenario at the moment then we can expect to see the highest accumulation in Eastern Ontario along the St Lawrence river with the potential for 15-25cm. The accumulation will drop off as you go further to the north and west except for the GTHA which could see lake enhancement off of Lake Ontario pushing totals to between 10-20cm. We’ve gone with a large accumulation range with this forecast than we typically use due to the low confidence in the outcome of the system - check back on Saturday night when we will hopefully have a more refined outlook for this storm.


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