11:03 AM EDT Saturday 17 August 2024 Tornado Warning in effect for: Guelph - Erin - Southern Wellington County At 11:03 AM EDT, Environment Canada meteorologists are tracking a severe thunderstorm that is possibly producing a tornado. Damaging winds, large hail and locally intense rainfall are also possible. This is a dangerous and potentially life-threatening situation. Take cover immediately, if threatening weather approaches. If you hear a roaring sound or see a funnel cloud, swirling debris near the ground, flying debris, or any threatening weather approaching, take shelter immediately. Go indoors to a room on the lowest floor, away from outside walls and windows, such as a basement, bathroom, stairwell or interior closet. Leave mobile homes, vehicles, tents, trailers and other temporary or free-standing shelter, and move to a strong building if you can. As a last resort, lie in a low spot and protect your head from flying debris. Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors! Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches. Tornado warnings are issued when imminent or occurring thunderstorms are likely to produce or are producing tornadoes. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather in Ontario, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm . For more information: ontario.ca/page/be-prepared-emergency . Watches 10:58 AM EDT Saturday 17 August 2024 Severe Thunderstorm Watch in effect for: Guelph - Erin - Southern Wellington County Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Hazards: 90 km/h wind gusts. Toonie size hail. Heavy downpours. There is a risk of tornadoes. Timing: Today through this evening. Discussion: Thunderstorms have developed that may be capable of producing 90 km/h wind gusts and toonie size hail. Rainfall rates of 40 mm are possible with these thunderstorms. Refer to the Special Weather Statement in effect for details on rainfall totals. Should conditions for the development of tornadoes improve this watch will be upgraded to a Tornado Watch. These storms will dissipate this evening as daytime heating comes to an end. Large hail can damage property and cause injury. Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Remember, severe thunderstorms can produce tornadoes. Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors! Emergency Management Ontario recommends that you take cover immediately if threatening weather approaches. Severe thunderstorm watches are issued when atmospheric conditions are favourable for the development of thunderstorms that could produce one or more of the following: large hail, damaging winds, torrential rainfall. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm . For more information: ontario.ca/page/be-prepared-emergency . Statements 5:02 AM EDT Saturday 17 August 2024 Special Weather Statement in effect for: Guelph - Erin - Southern Wellington County Significant rainfall is expected this weekend. Hazards: Local rainfall amounts of 40 to 80 mm. Rainfall rates of up to 40 mm in an hour. Timing: Continuing through Sunday. Discussion: Rain will continue this morning into Sunday. Locally higher amounts in thunderstorms are possible this afternoon and evening. This weather pattern typically brings rapidly changing conditions between sunny skies and heavy downpours. Rainfall warnings may be required and issued on short notice to reflect rapidly changing conditions. Heavy downpours can cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources and Forestry office. Visit Ontario.ca/floods for the latest details. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm .