Strong thunderstorms producing heavy rainfall are possible Thursday afternoon across southern Quebec. Flash flooding will be possible with the strongest storms. (Valley Weather Photo)
Strong thunderstorms possible Thursday afternoon.
Summer arrives at 10:42PM on Friday, and along with that will be the warmest air of the year to date. First off we have an active weather day across eastern Ontario and southern Quebec. The region has been blanketed by a sultry air mass, with a warm high of 30C (86F) on Wednesday and overnight lows remaining in the low 20s (70F). Along with elevated humidity levels, temperatures felt more like 35C (95F) Wednesday afternoon.
On Thursday, strong low pressure over northern Ontario, will move into central Quebec. Heavy rain will fall north of Montreal, with warnings already posted. A warm front has lifted north of of the city on Thursday morning, setting the stage for strong afternoon thunderstorms. Depending on how much clearing we receive, the storms could be severe locally.
The biggest threat for severe weather Thursday, including strong winds and hail, will be southeast of metro Montreal. (ECCC)
Most of the severe weather should occur south and east of Montreal. The main threat for the city west to the Ontario border, will be torrential rainfall, with the possibility of up to 50mm locally. That amount of rain over a short period of time could produce some flash flooding. Pay attention today to the latest forecast and any potential weather warnings.
After several flash flood events last summer in Montreal, we know which areas are prone to flooding. Try to avoid parking there today. Isolated showers will persist into Friday morning, before skies clear, with slightly cooler, less-humid air.
Over the weekend, the heat and humidity will begin to build back in, with more showers and thunderstorms late saturday and Sunday. Temperatures will start out in the mid 20s Friday, rising into the middle 30s by Tuesday. Dangerous heat, with humidex levels approaching 40C (104F) are possible in metro areas across southern Quebec, Monday and Tuesday.
No comments:
Post a Comment