Severe Thunderstorm Warning for Ontario

Written by Ragini Joshi

Published on : July 10, 2020 8:56

Severe Thunderstorm Warning for Ontario

Active for next 2 hours

At 8:40 p.m. EDT, Environment Canada meteorologists are tracking a dangerous thunderstorm capable of producing damaging wind gusts, up to nickel size hail and heavy rain.

This severe thunderstorm is located near Milton, moving north at 40 km/h.

Hazards: 110 km/h wind gusts and nickel size hail.

Source: Radar indicated. Wind damage has been reported with this thunderstorm.

Torrential rainfall is occurring with this storm and may lead to localized flooding.

Locations impacted include: Milton, Brampton, Mississauga, Georgetown, Norval, Hornby, West Brampton, Mayfield, Meadowvale, East Brampton, Trafalgar, Streetsville, Britannia and Lester B. Pearson International Airport.


Heavy downpours can cause flash floods and water pooling on roads. Very strong wind gusts can damage buildings, down trees and blow large vehicles off the road.

Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are likely to produce or are producing one or more of the following: large hail, damaging winds, torrential rainfall.
Recommended actions

Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors!

The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.
getprepared.gc.caTips from


Before a severe thunderstorm, unplug radios and televisions – listen for weather updates on your battery-powered radio.

Follow instructions for what to do before a severe storm


During thunderstorms, you should also stay away from items that conduct electricity, such as telephones, appliances, sinks, bathtubs, radiators and metal pipes.

Do not go out to rescue the laundry on the clothesline because it may conduct electricity.

If you are outdoors when a thunderstorm hits, take shelter immediately, preferably in a building but, failing this, in a depressed area such as a ditch, culvert or cave. Never go under a tree.