Updated January 4, 2025 at 12:40 p.m.
A powerful low pressure system centered over Newfoundland will affect the province by Tuesday, bringing strong winds and snow to some areas.
Saturday morning at 5 a.m., a special weather forecast was in effect for the province of Newfoundland and Labrador, but also closer to us, on the Lower North Shore. Who is responsible for these warnings? A weather bomb.
To qualify as a “weather bomb”, a low pressure system must intensify very quickly and must be accompanied by a marked drop in pressure. This must be at least 24 hectopascals (hPa) within 24 hours. In the case of the weather bomb which will affect us in the coming days, we expect a pressure drop of between 40 to 50 hPa in 24 hours. In other words, a fairly strong system is preparing to shake up the east of the country.
Snow and winds: the impacts of the system
The trajectory of this weather bomb is as follows: it enters eastern Newfoundland this Sunday, then a trough associated with the depression then descends towards the center of the province from Monday to Wednesday. So even if we are not in the thick of the action, we will still receive the repercussions of this depression.
First, gusts that could exceed 100 km/h could be recorded. These violent winds will surge especially during the night from Sunday to Monday. Sunday evening, gusts of 100 to 110 km/h are forecast for Blanc-Sablon and the Îles-de-la-Madeleine.
In addition to the winds, Quebec will be entitled to snowy precipitation. And even if the bulk of the system will have effects on the east of the country, the snow could still reach southern Quebec. By Wednesday, these areas could therefore receive between 2 and 5 cm of snow. Depending on the quantity received, this should help restore the thin white carpet in Greater Montreal.
For regions further north, such as Saguenay, Val-d’Or, Quebec and Charlevoix, it would be during the day of Monday that these snow accumulations would fall.
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