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ONTARIO | Severe Weather

Ontario: Weekend cold front to disrupt pleasant fall weather


Digital writers
theweathernetwork.com

Wednesday, September 26, 2018, 4:49 PM - Tornado warned storms swept through parts of southwestern Ontario Tuesday night, sparking great concern especially after last week's deadly severe storms and destructive tornado outbreak. As those storms have now completely passed through the province, eyes turn to the next cold front expected for the weekend. More on the timing, below. 

MUST READ: Don't fear the weather, be READY. Many IMPORTANT tornado warning signs, here


WEATHER HIGHLIGHTS:

  • Mainly dry and sunny weather returns Thursday through Friday
  • An incoming cold front to make temperatures feel cooler late week, splitting the province in two separate airmasses, increasing the risk for an active storm track
  • BE PREPARED: Monitor weather alerts for your area, here 

MORE TORNADO WARNED STORMS WITH 'MONSOON-LIKE RAIN'

Severe thunderstorms fired up across parts of southwestern Ontario Tuesday night, triggering tornado warnings for the Chatham-Kent, Rondeau Park, Sarnia, Petrolia and Western Lambton County regions just before 8:30 pm. Shortly after, the warning was later expanded to include Windsor, Leamington and Essex County around 8:40 pm local time. 



All tornado warnings were dropped at 9:25 pm ET., however, severe thunderstorms continued with heavy, flooding rains reported.


Visit our Complete Guide to Fall 2018 for an in depth look at the Fall Forecast, tips to plan for it and a sneak peek at winter

PLEASANT EARLY FALL WEATHER RETURNS

Following the midweek thunderstorm threat, temperatures will cool below the 20°C mark with a mix of sun and cloud dominating much of the day on Thursday. By Friday, temperatures will bump up above seasonal once again, however there's the threat for scattered rain showers late in the day, especially for northern parts of the Golden Horseshoe.

ANOTHER COLD FRONT DROPS TEMPERATURES FOR THE WEEKEND

"A cold front will track across our region late Friday with cooler weather spreading into our region for the weekend," says Weather Network meteorologist Dr. Doug Gillham. "Both Saturday and Sunday will have a mixture of sun and clouds with high temperatures in the mid teens." 

Bonus: While conditions will be on the cool side of seasonal, there's no longer a concern about the threat for showers through the weekend. 

BATTLE OF THE AIR MASSES: STORM RISK RETURNS

"Next week southern Ontario will be the battle zone between two contrasting air masses with a couple of fall storms tracking through the Great Lakes region," says Gillham. "Each system will draw much milder air north from the Gulf of Mexico into the region and so we have the potential for a few days next week to turn rather warm and humid. We will also have a few periods of rain and thunderstorms and will have to monitor the threat for severe weather."

Chilly weather will attempt to press back into the region as we head into the Thanksgiving weekend, but as of right now confidence is low as to when and to what extent the colder weather will reach the area.

WATCH BELOW: EF-3 TORNADO DAMAGE IN OTTAWA REGION

UPDATE: Officials increase Friday's tornado count to SIX
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Long Range: National pattern reversal runs into resistance
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