Much of Ontario is facing a prolonged period of dangerous heat on Tuesday, with a heightened risk of heat-related illnesses, including heat exhaustion and possible heat stroke. The most intense conditions are expected across southwestern Ontario, where a multi-day heat event is already underway. Daytime highs are forecast to reach between 34 and 36 C, while humidex values are expected to climb into the low-to-mid 40s. Overnight temperatures will offer little relief, remaining

Parts of northern and central Ontario as well as western Quebec, could see strong to severe thunderstorms on Tuesday, with damaging winds, heavy rainfall and large hail among the primary threats. Thunderstorms are possible across a broad area stretching from northeastern Ontario southward through parts of central Ontario and east toward the Ottawa Valley. Areas around Timmins, Sudbury, Huntsville and portions of eastern Ontario fall within the moderate risk zone. The greatest

There is an elevated risk of severe weather across portions of Manitoba and northwestern Ontario through Monday and into the overnight hours. The highest threat area stretches from southeastern Manitoba into parts of northwestern Ontario, where forecasters are warning that severe thunderstorms could produce damaging winds, large hail, torrential rainfall and isolated tornadoes. In Manitoba, an area of high risk covers much of the southeastern portion of the province, includin

A multi-day heat event will get underway across Southern Ontario today. Today,, maximum temperatures will be near or above 30 degrees and humidex values will be in the upper 30s to low 40s. Overnight, minimum temperatures will range from 21 to 23 degrees, resulting in little relief. Tonight there is also a risk of thunderstorms. This heat event will likely last through the week. Forecast confidence: High Impact scale: Moderate Extreme heat can become dangerous quickly. He

Once again today, there is a risk of severe thunderstorms across parts of the Prairie provinces, with the greatest risk centred on southern Manitoba and eastern Saskatchewan. A broad area stretching from southeastern Saskatchewan into southern and central Manitoba faces a moderate risk of severe weather through the day and into the evening. Thunderstorms developing in the region could produce damaging wind gusts, large hail and heavy rainfall. The most significant threat is e

A broad area of low pressure is expected to develop offshore of the southeastern United States within the next few days. The system is forecast to form along the western end of a frontal boundary situated off the U.S. coast. While significant development is not anticipated in the short term, gradual organization of the system could occur as it drifts westward over the coming week. Current forecasts indicate there is little chance of tropical cyclone formation during the next