Strong to severe thunderstorms are likely Thursday afternoon across the region, with another round of flooding possible in parts of southern Quebec, New York and Vermont. The main risk in metro Montreal will be gusty winds, small hail and heavy downpours. The greatest risk will be between 4-7pm for the city. Isolated tornadoes are possible across the region today.
Severe Thunderstorm Watch posted for southern Quebec
Flood Watch for New York and Vermont
There is an elevated risk of severe thunderstorms across southern Quebec and eastern Ontario during the afternoon and early evening hours today. Storms will develop in eastern Ontario and the Ottawa Valley around 2pm, arriving in Montreal during the afternoon commute. Heavy rain, frequent lightning, strong winds and isolated tornadoes are possible. This system has a history of strong thunderstorms across southern Ontario, Michigan and in the Chicago area last evening.
The last thing the region needs is more rain at this time, unfortunately that is exactly what is in the forecast. A warm front is in the process of lifting north of the St. Lawrence Valley Thursday morning, which will result in some brief showers and isolated thunderstorms for the next hour or so. After that Montreal will be in the warm sector for a few hours before strong low pressure and a trailing cold front arrive from the west.
Look for strong thunderstorms during the afternoon hours, producing 15-25mm of rain in some spots. This is not what the flood ravaged regions of the Townships Quebec City and Vermont need right now.
The threat for severe weather will diminish after sunset this evening. Look for muggy weather today and throughout the upcoming weekend. The high today in Montreal will be 27C (81F), with humidex reading well into the 30s.
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