|More strong thunderstorms are expected Monday afternoon across extreme eastern Ontario and southern Quebec.|
Temperatures are on the upswing today following a dry and cooler weekend. A warm front has already lifted north across the St. Lawrence Valley this morning with scattered showers. The humidity will build in quickly, with high temperatures near 28C (83F). The humidex reading will rise into the upper 30's. The air mass will quickly become unstable, with strong thunderstorms likely in Montreal by mid to late afternoon. Some of the storms could produce very strong winds, small hail and heavy downpours. The storms will develop by late morning in Ontario, ahead of a trough and cold front, before moving into Quebec and New York State.
|A strong gust front and thunderstorm approach L'Ile Perrot around 6pm Friday night. The storm produced winds in excess of 90km/h, knocking down trees and power lines in several west end suburbs. (Valley Weather Photo)|
Today's front front clears the region overnight Monday, with a partly cloudy, less humid, and cool day Tuesday. The high temperature will be near 22C (72F). After the one day break, the heat will begin building again Wednesday, reaching into the low 30's (up to 90F) by next weekend. We can also expect an increase once again in the humidity and the likelihood of more thunderstorms.