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Isolated funnel clouds, wind gusts up to 90 km/h possible this evening

Environment Canada issue severe thunderstorm warning for northern Niagara region
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Severe thunderstorm warning in effect for:
  • St. Catharines - Grimsby - Northern Niagara Region

At 8:07 p.m. EDT, Environment Canada meteorologists are tracking a severe thunderstorm capable of producing very strong wind gusts, up to nickel size hail and heavy rain.

A couple of thunderstorm with frequent lightning and torrential downpours are moving slowly southward. Rainfall rates of 50 mm in an hour may be associated. An isolated funnel cloud or wind gust to 90 km/h is also possible.

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

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.

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

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to or tweet reports using #ONStorm.

For more information: