Remnants of Beryl will drench southern Ontario and Quebec with heavy rain

Remnants of Beryl will drench southern Ontario and Quebec with heavy rain

Southern Ontario and Quebec are being hit this week by the remnants of moisture from what was once Hurricane Beryl, bringing heavy rain and a chance of thunderstorms

After Beryl made its third and final landfall as a Category 1 hurricane near Matagorda, Texas, early Monday morning, the once-powerful storm’s remaining moisture will move north across the border this week.

Beryl began to weaken rapidly as the storm moved inland on Monday, but still brought significant rainfall and flooding to Texas, resulting in at least two deaths.

By Tuesday, only a low will remain of the historic storm. By the time the low reaches the Mississippi Valley, a trough in the atmosphere over the central states will pick up the moisture and swing it toward southern Ontario and Quebec.

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Southern Ontario and Quebec will feel remnants of Beryl on Wednesday and Thursday

The earliest we can expect this moist low to reach the provinces is Tuesday night, and then Wednesday morning. Eastern Ontario and Quebec can expect rain to fall early this afternoon. It will move in from the south, through the Ohio Valley, across Lake Erie, and move north in waves through Thursday.

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While the system is being driven by an upper level trough, it will be driving a warm front across southern Ontario and Quebec at the surface. It is around this front that we expect the heaviest rainfall, as well as the risk of thunderstorms.

At this stage it is too early to give precise rainfall totals for the provinces, but local forecasts are expected to exceed 50mm through Thursday. There is also some uncertainty about where the most rain will fall.