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Ontario will enter the first full work week of July with rising humidity and the threat of severe thunderstorms on the horizon. We’ll need to keep a close eye on a complex of thunderstorms that could affect southern Ontario early Tuesday morning. More on your storm chances in the coming days and what to expect next week, below.
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MONDAY: INCREASING CLOUDS, RAINFALL FOR SOUTHERN ONTARIO
A weak system moving across the Great Lakes will allow clouds to accumulate in parts of southern and eastern Ontario into our Monday. Rain will begin to fall in the late morning and early afternoon hours.
Daily highs will depend on cloud cover. Temperatures should fall right around seasonal across rural and eastern Ontario, with highs climbing a few degrees above seasonal down toward Toronto and Windsor.
Things get more interesting on Monday night.
MONDAY NIGHT INTO TUESDAY: STORM RISK IN THE SOUTH IS REWARDED
A large wave of high pressure associated with the latest heat wave scorching the central United States will affect our weather in Ontario this week.
Complexes of thunderstorms tend to move along the northern edge of these ridges like train cars on railroad tracks, and we could see one such complex threatening parts of southwestern Ontario by early Tuesday morning.
There’s a decent chance people in southwestern Ontario will wake up early Tuesday morning to severe thunderstorms and gusty winds. Be sure to check back often for the latest details on this potential cluster of storms.
Tuesday will be a muggy day across the region. Humidex values will push 40 southwest toward Windsor, with feel-like values solidly in the 30s across the Greater Toronto Area (GTA) and points north.
PRECIPITATION TOTALS DEPEND ON THUNDERSTORMS
It’s been a pretty dry few weeks for the GTA as storms hit the north and south and it’s a pattern we could see repeating this week. Toronto has recorded just 7 mm of rain since June 12, well below normal expectations.
As we often see during the summer months, precipitation totals over the next few days will depend on where these thunderstorms develop. A community can see more rain than its neighbors with this kind of setup.
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The best chance for more intense precipitation exists in southwestern Ontario and up toward the Ontario-Quebec border. Locally heavier precipitation is possible under any stronger thunderstorms that develop into the moist air.
Going forward, temperatures this week will remain relatively constant across southern Ontario, with daytime highs moving within a few degrees of seasonal highs. In the first half of July, the photo does not show large temperature fluctuations, nor any prolonged heat.
Thumbnail courtesy of Unsplash.
Stay tuned to The Weather Network for the latest forecast for Ontario.
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