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Air / Meteorology

Summer Severe Weather

Storm Warning Clues

Wall cloud over Saskatoon. Photo: Dorothy Jendruck

Thunderstorms form quickly when atmospheric conditions are right. With sufficient instability and moisture, a storm can develop in as little as ten minutes and drop golfball-sized hail in fifteen minutes. Here are a few signs that may help you recognize the threat, and could save lives and property.
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Tornado and Lightning Myths

MYTH: I'll see an approaching tornado in time to take cover.
FACT: You won't always see a tornado. The approach of many tornadoes is masked by heavy rain or hail. In forested, hilly, or built-up areas, tornadoes may not be visible until they are imminent. Some tornadoes do not have a visible column from the cloud to the ground and are noticed only when the debris-laden surface winds are close.

MYTH: I can outrun a tornado in my car.
FACT: The average forward speed of a tornado is 40 to 65 km/h but some travel more rapidly. Your car may be able to travel faster than a tornado, but you need to follow the road. Tornadoes don't. If you are in a vehicle and a tornado is advancing on you, drive out of its path or seek an alternative sturdy shelter.
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With severe summer weather, knowing what to do in a weather event is the key to safety and health. Stay alert - stay alive!

Forecasting Your Weather: How a Weather Forecast is Made

Learn how a weather forecast is made, with David Phillips, Climatologist.