Flooding rains in southern Ontario

Flooding in the greater Toronto area from torrential rain on Tuesday. (CTV News)

Low pressure is moving eastward along the Quebec/Vermont border this morning after bringing a swath of very heavy rain to the region late Tuesday and overnight. Rainfall amounts were impressive with 44mm at Toronto, 100mm (4 inches) at Markham, 91mm at Kingston, 35mm at Kemptville, 54.4mm at St Anicet, Quebec and just over 20mm here on L'Ile Perrot. The heaviest rain in Quebec fell along the US border with between 50 and 75mm (2-3 inches) of rain from Valleyfield east into the Sherbrooke area. Rain continues this morning in extreme southeast Quebec, but it is tapering off. In its wake it will be another humid and muggy day with the threat for isolated showers and temperatures up to 26C.

For many reporting stations yesterday's rain was more than what had fallen in the entire month of August. Montreal only had 48.2mm of rain officially for August, so the 20mm on Tuesday was more than welcome.