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| Boxing Day morning was spectacular but chilly in Montreal, with frost painted trees against a vivid blue sky here in the St. Lawrence Valley. (Valley Weather) |
Happy Holidays to everyone no matter what you are celebrating this week. For me, it has been a perfect Christmas holiday so far, with nearly ideal weather conditions for anyone who loves snow at this time of year. The fresh 10-20cm that fell on on Christmas Eve was followed by cold conditions, allowing for outdoor activates such as skating, skiing or sledding for the first time during the holidays in a few years.
At the same time, driving conditions have been good over the last 48 hours, with the exception of some isolated valley fog as well as a few slick spots on bridges and elevated surfaces especially late overnight and during the early morning hours.
We have had a temperature inversion here in the St. Lawrence Valley, which has meant colder air has been trapped at the surface while it warm air streams aloft at higher elevations. This has resulted in poor air quality here in Montreal at times, with a smog warning in effect for the city. Temperatures have dropped into the minus teens overnight, only rising to around -8C (18F) during the day.
We have one more day of these wintry conditions, before high pressure drifts east and is replaced by a series of warm fronts and low pressure systems. The first system on Saturday will produce warmer temperatures along with spotty freezing rain. By Sunday and into New Years Eve, temperatures will rise well above freezing, perhaps as warm as 6C (43F), accompanied by a decent amount of rainfall. Amounts may exceed 25mm (1 inch) here in Montreal.
By New Years Day and the start of 2025, colder air returns along with mixed precipitation at times. More details to follow. For now, you may want to clear downspouts of snow and ice in anticipation of the heavy rain expected Sunday and Monday.
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