Supercells possible with severe storm setup in northwestern Ontario
Folks across northwestern Ontario should pay close attention to the weather on Tuesday as severe thunderstorms will be possible, alongside one or two tornadoes
With Ontario getting a break from the heat to start the week, but will return soon, northwestern sections of the province will be getting into the severe weather risk on Tuesday.
In fact, multiple days of thunderstorms are expected in northern Ontario as a boundary stalls over the region. Tuesday could see severe thunderstorms push into the region, with strong winds, heavy downpours and hail as threats. Some areas near the Ontario-Minnesota border, west of Thunder Bay, could also see supercells, so one or two tornadoes can't be ruled out.
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Tuesday's storm risk also extends back into southern Manitoba, with a severe chance in southeastern sections.
Make sure you keep an eye on the radar––especially if you have outdoor plans––and stay aware of any severe weather watches or warnings issued in your area.
Tuesday: Multiple storm opportunities
An active weather boundary moved into northern Ontario on Tuesday, will stall for multiple days this week--bringing several opportunities for severe weather.
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As the day progresses on Tuesday, from late afternoon through the evening, storms could pop up from Dryden to Fort Hope, possibly becoming marginally severe with two-centimetre hail possible.
If you are in the region, please stay on top of severe weather alerts and know what to do and where to go in the event severe weather approaches.
Forecasters are also closely watching the Minnesota-Canada border, just west of Thunder Bay, for possible rotating supercells and one or two tornadoes.
Wednesday: Storm risk pops up again
On Wednesday, forecasters will then turn their attention to the potential for another cluster of storms to develop along the Lake Superior shores.
The area at risk will stretch from Thunder Bay through Wednesday morning to Sault Ste. Marie by the afternoon and evening.
There is some uncertainty on how much thunderstorm energy pass over the Great Lakes, so a lack of could limit the severe risk.
Heavy rainfall and frequent lightning are the main threats. Localized flooding concerns are there with training thunderstorm potential, with some regions possibly on the hook for 50-100 mm of rain.
After a warm start to the week, a strong cold front will track across the region with much cooler weather late next week and on the weekend, continuing well into the first week of August, especially in eastern areas.
Warmer weather is expected for the second week of August, however.
Thursday: Severe weather chance pivots southward into the lower Great Lakes region, eastern Ontario
Thursday appears to feature the most severe and active setup of the week, with the risk pivoting into northeastern and eastern Ontario, as well as the Lake Huron and Georgian Bay shores.
Southern and eastern Ontario will be seeing very muggy air, pushing the humidex into the 40s.
High moisture and thunderstorm energy by Thursday afternoon will help to fuel strong thunderstorms.
An active boundary slowly slides east, with heavy rain and two-centimetre hail possible from Sault Ste. Marie to Ottawa. Forecasters are monitoring the risk for rotating storms, which are possible but highly uncertain this far out.
The Greater Toronto Area (GTA) could see pop-up storms in the afternoon, but there is still some uncertainty.
Friday will bring another threat for showers and thunderstorms. Saturday will be partly sunny, very warm and humid, again with a risk for a shower or thunderstorm, but most of the day will be dry and cottage country should remain dry. Sunday will be mostly sunny, hot and humid.
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Stay with The Weather Network for more information and updates on your weather across northwestern Ontario.