Thunderstorms bring over 100 mm of rain to parts of southern Ontario


Thunderstorms and showers pushed across parts of southern Ontario on Sunday afternoon and evening.


Some areas received over 100 mm of rain and there were reports of flash flooding in Barrie, Caledon, and Brampton.


Below are 24-hour rainfall accumulations from the Toronto and Region Conservation Authority, Environment Canada weather stations, and CoCoRaHS volunteer observers as of 8:00 am EDT:

  • Tullamore 102.80 mm (48 hour total of 120.60 mm)

  • Heart Lake 85.00 mm (48 hour total of 138.40 mm)

  • York Pumping Station 19.20 mm

  • Oak Ridges 17.20 mm

  • Collingwood 36.4 mm

  • King City North 32.0 mm

  • Egbert 10.4 mm

  • Barrie 9.8 mm

  • Toronto Pearson Int. Airport 6.6 mm

  • Shallow Lake 56.6 mm

  • Cobourg 36.6 mm

  • Ridgetown 36.1 mm

  • Newmarket 33.0 mm

  • St. Thomas 34.0 mm

  • Aurora 33.3 mm

  • Appin 32.0 mm

  • Blenheim 30.0 mm

  • King City 29.7 mm

  • Kemble 29.5 mm

  • Keene 25.1 mm

  • Union 23.4 mm

  • Brighton 23.1 mm

  • Durham 23.1 mm

  • Glencoe 21.1 mm

  • Toronto City 19.1 mm

  • Oro Park 18.8 mm

  • Peterborough 18.3 mm


Data Source: Environment and Climate Change Canada