Sluggish storms bring soaking rains, flood potential in Ontario

·2 min read
Sluggish storms bring soaking rains, flood potential in Ontario
Sluggish storms bring soaking rains, flood potential in Ontario

Southern Ontario got off to a stormy and soggy start to the second week of June, with severe thunderstorms and drenching rains pushing through from a low-pressure system moving across the Great Lakes. This prompted warnings, watches and special weather statements. Because of the slow-moving nature of the storms, training in their nature, the threat of localized floods is quite elevated in parts of the south. The risk of storms and rain will persist through Monday overnight and into Tuesday morning. More on the impacts expected, below.

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THROUGH TUESDAY: THUNDERSTORMS WITH HEAVY DOWNPOURS PRESENT FLOODING POTENTIAL

There's a heightened threat for flooding across parts of Ontario to start this new week. A low-pressure system moved into Ontario Monday afternoon, bringing heavy rainfall across the region, localized flooding possible. Special weather statements and rainfall warnings remain in place.

Heavy rain and and the risk of nocturnal thunderstorms are forecast across southern and central Ontario through Monday overnight and into Tuesday morning, as well.

ONOVERNIGHTRISK
ONOVERNIGHTRISK

Training thunderstorms could enhance rainfall totals and threaten flooding to some areas where storms continue to redevelop and track over the same localized area.

Training thunderstorms line up one behind another and move over the same region, often resulting in repeated rainfall and high accumulations, which increases the risk for localized flooding.

ONTUESRISK
ONTUESRISK

With the storms, copious amounts of lightning can be expected.

In all, between 30-60 mm of rain is likely in the hardest-hit areas, along the Erie shores and 401 corridor stretching across the northern Greater Toronto Area, with locally higher amounts possible in areas that do see thunderstorms.

ONRAIN
ONRAIN

The majority of the rain will be out of the region by Tuesday afternoon. As the cold front drapes across the Golden Horseshoe, winds will pick up in the late afternoon, with gusts of 40-50 km/h.

LOOK AHEAD: RISK FOR RAIN SHOWERS CONTINUES, NO SIGNS OF HIGH HEAT

Conditions will largely improve by Tuesday night, though with the threat for a passing rain shower at times lingering into the end of the week.

Most of the weekend looks to be rain-free, but temperatures will remain on the cool side of seasonal. A couple of warmer days are expected during the middle of next week, though followed by cooler temperatures once again for next weekend.

Thumbnail courtesy of lightningchasing, taken in Auden Park, Ont.

Stay tuned to The Weather Network for all the latest on conditions across Ontario.

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