Remains of Beryl to bring heavy rain to Ontario and Quebec

Tropical depression Beryl will lift northeast into the lower Great Lakes and eventually eastern Ontario on Thursday. Very heavy rain and thunderstorms will move into southern Ontario early Wednesday and spread into southern Quebec later in the afternoon. 50 to 100mm of rain is possible for many locations.

Special Weather Statement for metro Montreal.

Heavy Rain Warning for southern Quebec south of the St. Lawrence River as well as eastern Ontario

Flash Flood Watch for northern New York and Vermont

What is left of hurricane Beryl is moving across the Ohio Valley late Tuesday evening, expected to lift northeast into the Great Lakes on Wednesday. Along and to the north of the track of Beryl, heavy rain and training thunderstorms are expected, with flash flooding possible. 

Tuesday was warm and humid in Montreal, with another 30C (86F) high for the city. Humidex values were well into the middle 30s. A weak front pushed south across the St. Lawrence Valley late in the day with a few showers and will settle into New England before moving north as a warm front Wednesday. That front will become the focus for very heavy rainfall Wednesday as it lifts back north. Where the front sets up will determine who has the greatest flood threat. 

The thinking at this time is that the heaviest rain will fall along the St. Lawrence Valley in Ontario southeast into the Adirondacks of New York. Montreal will be on the northern edge of the heaviest rain, with 30-50mm (1-2 inches) possible. Any slight shift north would bring the flood threat into Montreal.

At present, heavy rain warnings are in effect along the St. Lawrence River and south to the US border. Amounts may exceed 50mm from late Wednesday into Thursday morning. The biggest threat for flash flooding looks like northern New York into Vermont, where 50-100mm (2-4 inches) is possible, with local amounts in excess of 150mm (6 inches) possible. This amount of water would produce flash, urban and river flooding.

Hurricane Beryl produced catastrophic damage as it made landfall near Matagorda Bay, Texas early Monday morning. Portions of the central and upper Texas coast reported significant storm surge flooding along with tornadoes. Above, surge flooding in Sargent, Texas. (Photo Mike's Weather Page)

Beryl's circulation has been producing flash flooding and isolated tornadoes across the Mississippi Valley on Tuesday, lifting northward into the Ohio Valley and Great Lakes. The death toll from Beryl in Texas and Louisiana has reached 7. On Tuesday, nearly 2 million residents along the Gulf Coast and in Houston remained without power in searing 100F heat.

Beryl should become absorbed into an upper level low and move southeast across the region Thursday. The showers will taper off, but conditions will remain warm and humid throughout the week and into next weekend.