The Toronto and Region Conservation Authority (TRCA) extended its flood outlook on Monday afternoon, cautioning that heavy rainfall over a short period could lead to localized flooding in affected areas.
Daytime highs soar above seasonal norms
A surge of warm southerly air is set to dominate southern and eastern Ontario this week, with daytime highs reaching the high teens to above 20°C—temperatures more typical of late May than mid-April. Strong southwesterly winds, gusting up to 60 km/h, will accompany this warmth, alongside moisture-rich systems drawing energy from the Gulf of Mexico.
Temperatures will consistently remain 10°C above seasonal norms, with Toronto’s Pearson International Airport forecast to record five or six consecutive days near 20°C this week.
Typically, Pearson airport averages fewer than three days above 20°C in April. However, mid-April 2023 saw more intense warmth, with temperatures climbing to 29.4°C on April 12, setting a notable benchmark for this time of year.
Strong winds and temperature drop expected this weekend in southern Ontario
A strong cold front will move across the region Saturday night into Sunday, bringing very windy conditions and a sharp drop in temperatures. By Sunday, daytime highs will hover in the single digits, with flurries expected, including potential lake-effect flurries east of Lake Huron and Georgian Bay.
Early next week is forecast to resemble late March, with changeable temperatures throughout the final week of April. Near-seasonal to cooler-than-seasonal conditions are anticipated to persist into early May.
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Stay tuned to The Weather Network for the latest forecast updates across southern Ontario.
