Spring snowstorm for eastern Quebec and a look at the long range
March 20, 2019; 10:36 AM
Spring officially begins late this afternoon in the east and during the middle of the afternoon in the west.
Unseasonably warm weather will persist from Alaska to western Canada much of this week while a storm will deliver an early-spring snow surprise to eastern Quebec Friday into Saturday.
The map below shows our latest snowfall forecast for the storm. Snowfall amounts will be highly dependent on elevation, which is typical for this time of the year. The air ahead of this storm is not that cold (high pressure is already moving off the East coast already) and actually modifying, but the air behind the storm is abnormally cold.
Montreal is a tough call, the track of the storm is quite favorable for a heavy snowfall. However, low-level temperatures will not be quite cold enough for much of Thursday night and Friday for much in the way of snow. By Friday evening, the boundary layers get cold enough for all snow, and it may snow at a decent rate through the night into early Saturday. At this point, I am leaning toward 8-12 cm in the city of Montreal, but just outside of the valley an into the higher terrain the amounts should be significantly higher. It may be a similar situation for Quebec City with heavy accumulations above the valley. Ottawa will be on the western edge of the storm with generally light snow.
One concern is that the snow Friday into Friday night will be wet and stick to trees/power lines. By Saturday, the snow is fluffier as it turns colder, but then the winds increase and we may see a situation where some trees may lose limbs or uproot.
Higher elevations of eastern Quebec may be looking at 30-40 cm of snow out of this.
Long-range pattern update........
Spring gradually takes hold in April
The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com