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Southern Ontario Thunderstorms 60mm Rain Warning

Jake by Jake
March 30, 2026
in News, Weather
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The Southern Ontario Thunderstorms 60mm Rain forecast is raising concerns across the region, including Durham Region, as Environment Canada warns of potentially severe weather conditions expected early this week. Residents in Oshawa, Whitby, Ajax, Pickering, Clarington, Uxbridge, Scugog, and Brock are being advised to prepare for heavy rainfall, strong winds, and possible thunderstorms.

According to Environment Canada, the Southern Ontario Thunderstorms 60mm Rain system is expected to move through much of southern Ontario on Tuesday, bringing significant precipitation and unstable weather conditions. Forecasters indicate that some areas could receive up to 60 mm of rainfall, with peak hourly rates reaching between 25 and 35 mm.

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The Greater Golden Horseshoe region, which includes Durham Region, is expected to experience moderate impacts from the Southern Ontario Thunderstorms 60mm Rain event. Thunderstorms are likely to develop throughout the day, with stronger and more intense storms expected during the afternoon hours.

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In addition to heavy rainfall, the Southern Ontario Thunderstorms 60mm Rain forecast also includes the possibility of wind gusts reaching up to 90 km/h and hail as large as a toonie. These conditions could lead to hazardous situations, particularly in areas that experience multiple rounds of storms.

Environment Canada has warned that the Southern Ontario Thunderstorms 60mm Rain event may result in localized flooding, especially in low-lying or poorly drained areas. With high rainfall accumulation expected in a short period, stormwater systems may become overwhelmed, increasing the risk of water pooling on roads and properties.

Residents across Durham Region should also be aware of the potential for power outages and damage caused by strong winds. Downed tree branches and fallen trees are possible due to the combination of saturated ground and gusty conditions. These risks highlight the importance of staying informed and taking necessary precautions during the Southern Ontario Thunderstorms 60mm Rain period.

Further north, conditions are expected to be slightly less severe, but the Southern Ontario Thunderstorms 60mm Rain forecast still indicates significant rainfall totals. Even in these areas, localized flooding and lightning activity remain possible, reinforcing the widespread nature of the weather system.

This developing weather pattern follows a brief period of warmer temperatures earlier in the week, making the sudden shift to stormy conditions more noticeable. The Southern Ontario Thunderstorms 60mm Rain forecast highlights the unpredictable nature of spring weather in Ontario, where rapid changes can occur within a short timeframe.

Officials are encouraging residents to monitor weather updates closely and avoid unnecessary travel during periods of heavy rainfall or severe storms. Taking precautions such as securing outdoor items, checking drainage systems, and staying indoors during lightning activity can help reduce risks associated with the Southern Ontario Thunderstorms 60mm Rain event.

Overall, the Southern Ontario Thunderstorms 60mm Rain warning serves as an important reminder for residents to remain prepared as severe weather approaches. With significant rainfall, strong winds, and thunderstorms expected, staying alert and informed will be key to ensuring safety throughout the week.

Tags: AjaxBrockClaringtonDurham Region weatherFlood RiskHeavy rain OntarioOntario WeatherOshawaPickeringScugogSpring StormUxbridgeWhitby
Jake

Jake

I’m a Senior Editor at AllAboutDurham.com, and I enjoy highlighting the people and stories that make Durham unique. Working under the Managing Editor, I help shape clear, timely local updates and I’m always on the lookout for meaningful community stories.

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