Floods in Quebec, Canada during July 2023.
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Info on the weather event:
Around July 10 to 12, record rains led to dramatic rises in Québec waterways leading to flooding and evacuations from Saguenay to Sherbrooke. More than 135 mm in less than 48 hours sent rivers surging, including the St-Francois River which rose from 2 to 6 m in less than four hours. By the end of July, Sherbrooke recorded three times its normal monthly total. Early on July 12 and into the next day, severe thunderstorms moved through southern Ontario and Québec causing flash flooding and wind damages from tornadoes. Rainfall totals ranged from 50 to 80 mm from Sarnia to Orillia and 50 to 90 mm of rain through the St. Lawrence Valley in Québec, including another 90 mm dump in Montréal.
On July 20-21, another classic undercutting cold front of warm humid air triggered a series of supercell thunderstorms travelling from near Windsor to southern Québec. The weather featured microbursts, tornadoes, hailers with baseball-size hail and torrential flash floods. Joliette, Québec received the most rainfall, between 100 to 120 mm, with most of it within two hours. Barely a week later, a series of severe thunderstorms dropped more heavy rains resulting in flash flooding from Southwestern Ontario to Québec City. Storms led to widespread street flooding and left 55,000 without power.
Source:https://www.canada.ca/en/environment-climate-change/services/top-ten-weather-stories/2023.html