Warm & humid weather

Thunderstorms develop in the warm and humid air (27C and 82% RH) in Plattsburgh, N.Y. yesterday.

The air is saturated across southwest Quebec and eastern Ontario this morning. Dense fog is reported in many locations, reducing visibilities to less than 1km locally. That should burn off slowly, allowing the sun to begin mixing the air. A front will slide across the region later today triggering more showers and thunderstorms. The biggest threat from these storms will be the same as yesterday, heavy rain. Thankfully the storms were quick moving in most locations yesterday, so rainfall amounts were limited and flooding was kept down. Still, radar estimates show between 15-25mm across upstate New York in a very short period of time and observations from the South Shore here in Montreal show amounts up and over 40mm, Montreal (Dorval) recorded 19mm. The rain produced flooding along Highway 15 south of Montreal, and one lane remains closed this morning.

This weather pattern will be in place most of the week before a dryer and slightly cooler air mass moves in for next weekend. With any luck we may actually have a dry and sunny weekend to start August. We will then say goodbye to one of the coolest, dullest and rainiest July's on record!