Intense heat and humidity will keep Ontario sweltering for the next several days, with daytime highs once again hitting the low 30s and humidex values in the upper 30s, possibly hitting the low 40s for some. These conditions are contributing to the widespread thunderstorm risk the province will see on Monday. The unrelenting heat stretches into the week, but there is some relief in sight. Details and timing, below.
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MONDAY: WIDESPREAD THUNDERSTORM RISK
Many areas in Ontario will see the risk for thunderstorms on Monday, however, forecasters say that the storms that do occur will be non-severe in nature. Heavy downpours and strong wind gusts are the main concerns in the areas that do see storms pop up.
Some areas in northeastern Ontario and western Quebec are seeing the potential for severe thunderstorms on Monday. Heavy downpours with localized flooding and small hail are possible.
EARLIEST JUNE HEAT WAVE ON RECORD?
The unsettled weather accompanies uncomfortably hot weather across Ontario. Depending on how long the high temperatures last, this stretch of extended heat could be one of the earliest on record for June.
The last time the city of Toronto, for example, saw five days of 30°C+ temperatures in June was back in 1949 from June 11-15. There was however, an even longer seven day stretch of extreme heat as early as May 14 in 1962.
Precipitation-wise, widespread thunderstorms are expected mid-week as a cold front sags south through the region, but there is still uncertainty on the timing of the front.
Stay tuned to The Weather Network for the latest on the incoming heat in Ontario.