Environment Canada warns of up to 100 mm of heavy rainfall in western Quebec. Storm watches also cover eastern Ontario and parts of Gatineau.
Environment Canada Issues Rainfall Warnings Ahead of Monday Storms
Environment Canada has issued rainfall warnings for western Quebec and thunderstorm watches across much of eastern Ontario and the Ottawa-Gatineau region, cautioning residents about severe weather expected to intensify through Monday.
Intense Rainfall Forecast for Western Quebec
Warnings were issued Sunday afternoon for regions northwest of Gatineau, including Cantley, Wakefield, Shawville, and Maniwaki. According to Environment Canada, bands of heavy rain will develop late Sunday night into Monday morning, bringing total accumulations of up to 100 millimetres by Monday afternoon.
Officials caution the rain may lead to localized flooding, flash floods, and potential washouts near creeks, rivers, and culverts. Residents in flood-prone or low-lying areas are being urged to monitor water levels and take precautions.
Thunderstorm Watches Expand in Ontario
Meanwhile, a severe thunderstorm watch has been placed over a wide stretch of eastern Ontario. As of 8:00 p.m. Sunday, the advisory covers areas from Renfrew in the west to Cornwall in the east, and as far south as the Perth region. The city of Gatineau and nearby sections of the Outaouais are also under the storm watch.
Thunderstorm watches indicate the potential for severe weather, including strong winds, lightning, heavy downpours, and hail. These differ from warnings, which confirm that hazardous weather is occurring or imminent.
Why the Alert Was Issued
The weather system moving through the region is being driven by warm, moisture-laden air, increasing the likelihood of thunderstorm activity and prolonged precipitation. Meteorologists say the combination of unstable conditions and slow-moving rain bands could result in heavy rainfall totals in localized areas.
What Residents Should Do
Environment Canada advises residents to stay indoors during thunderstorms, avoid unnecessary travel, and secure any outdoor belongings. Drivers should watch for pooling water and reduced visibility on roads. People near waterways should remain alert for rising water levels and rapid flow changes.
Emergency crews and municipalities across the region are on standby to respond to flooding or infrastructure concerns as conditions evolve.
Outlook Into the Week
The heaviest rainfall is expected to taper off by Monday evening, although some areas may continue to experience isolated showers into Tuesday. Environment Canada will continue to monitor developments and update its alerts as needed.
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