Severe Thunderstorm

Thunderstorm messages

Stay aware of weather watches and warnings and know the difference between a watch and a warning.

Severe thunderstorm watch: When conditions are favourable for the development of severe thunderstorms with one or more weather conditions
Severe thunderstorm warning: When there is evidence based on radar, satellite pictures, or from a reliable spotter that one or more weather conditions is imminent or occurring

Wind gusts of 90 kilometres per hour or greater, which could cause structural wind damage
Hail of two centimetres or larger in diameter
Heavy rainfall, as per rainfall criteria, excluding those for winter and during thaw

Keep your 72 hour kit in a place that's easily accessible even if the power goes out
Secure loose objects such as garbage cans that can injure people and damage property if they become airborne

Seek shelter indoors
Stay away from windows, glass doors and skylights
Listen to weather warnings and information from local authorities. Use a battery powered or crank radio if your power is out.
Don't go outside to cover plants, garden furniture or to collect laundry once severe weather begins
Avoid parts of the building that could have something fall on it, such as overhanging branches
Stay indoors until at least 30 minutes have passed since the last rumble of thunder, even if you don't see lightning
Be aware that severe thunderstorms can have multiple hazards including lightning, damaging winds, hail, heavy rain, and rarely, tornadoes

If shelter isn't available, a hard top vehicle will provide the next best shelter, but don't touch any metal surfaces
A tree isn't a safe shelter as it may be struck by lightning or you may be injured by falling branches
Avoid water and wet surfaces since water conducts electricity