Tuesday, August 03, 2010

Severe Thunderstorm Warning

Severe thunderstorms are affecting eastern Ontario and western Quebec at this hour. Warnings have been posted for Montreal. Heavy rain is falling with these storms and the possibility exits for over 50mm in just a few hours with upwards of 100mm with some storms. They are training, forming over the same regions from Ottawa to Cornwall and east to Montreal. Flooding is possible.

Here is the official update from Environment Canada:

Metro Montréal - Laval
4:30 PM EDT Tuesday 03 August 2010
Severe thunderstorm warning for
Metro Montréal - Laval continued

Radar and satellite images show that heavy thunderstorms are developing near Ste-Justine-de-Newton and near Montréal. A tornado may have touched down near St-Eustache at around 4 PM.

These thunderstorms are tracking eastward at 40 km/h and could produce gusts of 90 km/h or higher, hail 2 centimetres in diameter or larger, heavy rain and frequent lightning. Warning... Some of these thunderstorms are particularly intense and one of them could produce a tornado.
People in these regions should take the required precautions and listen for subsequent weather warnings.

This warning is in effect from 04:25 PM to 05:25 PM EDT.

Southern Québec is under the influence of a humid and very unstable airmass. Thunderstorms will develop during the afternoon and some of them could be severe.

1 comment:

Robyn said...

I love the idea behind your website, I have family back in Montreal and I'm constantly comparing the midwest weather (tornadoes especially) to what I consider good ole fashioned Canadian weather. In all my years back home I can't recall many tornadoes maybe one or two but of course there's the ice storm, Saguenay flood and the famous flash flood in '87... i still prefer those over tornadoes...