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Mannheim, ON

Alerts in Effect

Severe Thunderstorm Watch

Issued at 10:46 Thursday 17 August 2017

Conditions are favourable for the development of severe thunderstorms this afternoon. These thunderstorms are capable of producing strong wind gusts, large hail and heavy rain.


Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles. Remember, severe thunderstorms can produce tornadoes. Heavy downpours can cause flash floods and water pooling on roads.

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 or tweet reports using #ONStorm.

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