{"id":1197,"date":"2026-04-12T13:43:15","date_gmt":"2026-04-12T13:43:15","guid":{"rendered":"https:\/\/www.europesays.com\/canada\/1197\/"},"modified":"2026-04-12T13:43:15","modified_gmt":"2026-04-12T13:43:15","slug":"soaking-spring-rains-stormy-week-ahead-in-southern-ontario","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/canada\/1197\/","title":{"rendered":"Soaking spring rains, stormy week ahead in southern Ontario"},"content":{"rendered":"

Be sure to grab your umbrella<\/a> before heading out over the next few days as a warmer pattern and multiple systems pushing into southern Ontario will bump up the chance for heavy rainfall and thunderstorms.<\/p>\n

Some areas could see as much as 75 mm-100 mm of precipitation through the week ahead. Special weather statements and yellow-coded rainfall warnings are in effect.<\/p>\n

DON\u2019T MISS: Forecasters concerned about a growing El Ni\u00f1o this summer<\/a><\/p>\n

Water will likely pool on roads and in low-lying areas. Don’t drive through flooded roadways. Allow extra time for travel and avoid low-lying areas. Watch for washouts near rivers, creeks and culverts.<\/p>\n

Warmer temperatures and heavy rain mark the start of this week<\/p>\n

An active and unsettled pattern<\/a> is in the forecast over the next couple of days. Several systems are expected to sweep across southern Ontario, including surges of remarkably warm temperatures for the middle of April.<\/p>\n

\"Ontario<\/p>\n

Ontario precipitation timing Sunday evening<\/p>\n

Big temperature divide on Sunday with cool showers north and a mild, warm sector across southwestern Ontario.<\/p>\n

The first wave of heavy rainfall will accompany a warm front lifting across the region on Sunday afternoon.<\/p>\n

We\u2019ll see the heaviest pockets of rain target cottage country and communities surrounding Georgian Bay, where amounts could locally push 30-40+ mm.<\/p>\n

\"Ontario<\/p>\n

Ontario lightning potential Sunday afternoon<\/p>\n

Additionally, a chance for thunderstorms will build Sunday evening into Monday along and ahead of the warm front. Locations near and north of cottage country and across northern Ontario are most likely. Heavy rainfall and frequent lightning are the biggest hazards.<\/p>\n

Folks around the Greater Toronto Area (GTA) can expect generally less than 10 mm of rainfall through Monday morning, with higher amounts of 10-20 mm across northern sections of the region.<\/p>\n

Early Monday morning, showers will continue across much of southern Ontario.<\/p>\n

\"Ontario<\/p>\n

Ontario lightning potential Monday overnight<\/p>\n

Monday will see mild temperatures from Windsor to Ottawa, featuring 18\u00b0C to 22\u00b0C highs, with a national hot spot forecast near Essex and Windsor.<\/p>\n

Temperatures peak on Tuesday for the GTA inside the warm sector of another low-pressure system. These temperatures will also feature southwesterly wind gusts up to 60+km\/h.<\/p>\n

The next round of heavy rainfall is forecast on Tuesday, associated with a new developing low that slides across the Great Lakes, with the heaviest amounts associated with thunderstorm activity.<\/p>\n

\"Ontario<\/p>\n

Ontario rainfall accumulation through Monday<\/p>\n

Tuesday morning: Clusters of storms are forecast to move in from the west across southern Ontario, prompting the threat of heavy rain–making for a slower-than-usual commute.<\/p>\n

Tuesday afternoon-evening ahead of a cold front: Highway 401 corridor storms are forecast to be scattered and not widespread, but the risk will continue until more stable air flows in from the northwest.<\/p>\n

\"Ontario<\/p>\n

Ontario thunderstorm energy Tuesday afternoon<\/p>\n

Beyond, the soaking-wet spring signal continues this week, with some regions recording close to 100 mm of rainfall over the next seven days near Georgian Bay. Most other regions can expect 30-50 mm of rainfall, with locally higher amounts in thunderstorms.<\/p>\n

As well, models continue to keep temperatures remarkably well-above seasonal through the week, upwards of 10\u00b0C above normal at times.<\/p>\n

Temperature values are more typical of late-May than mid-April. Five or six consecutive days at 20\u00b0C is forecast for Pearson International Airport (Monday-Saturday), an exceptional feat for mid-April.<\/p>\n

\"Ontario<\/p>\n

Ontario departure from normal highs Tuesday<\/p>\n

On average, April’s typical record is less than three days above 20\u00b0C for the airport. More extreme warmth at Toronto’s airport occurred during mid-April 2023 (29.4\u00b0C on April 12, 2023).<\/p>\n

Be sure to check back for more on this potential as it draws closer.<\/p>\n

WATCH: Are the early U.S. tornadoes bad news for Ontario’s season ahead?<\/p>\n

Click here to view the video<\/a><\/p>\n

Stay tuned to The Weather Network for the latest forecast updates across southern Ontario.<\/p>\n","protected":false},"excerpt":{"rendered":"Be sure to grab your umbrella before heading out over the next few days as a warmer pattern…\n","protected":false},"author":2,"featured_media":1198,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[17,870,869,866,94,865,867,868],"class_list":["post-1197","post","type-post","status-publish","format-standard","has-post-thumbnail","category-canada","tag-canada","tag-cottage-country","tag-georgian-bay","tag-heavy-rainfall","tag-ontario","tag-southern-ontario","tag-thunderstorms","tag-warm-sector"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts\/1197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/comments?post=1197"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/posts\/1197\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/media\/1198"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/media?parent=1197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/categories?post=1197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/canada\/wp-json\/wp\/v2\/tags?post=1197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}