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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
A squall is a sudden, sharp rise in wind speed of at least 16 knots (30 km/h) lasting a minute or more, often carrying rain or snow. For Squall Island, the live forecast above shows conditions that can produce such bursts, especially along exposed shorelines and near Lake Superior.
How does a squall form?
Squalls typically develop along cold fronts or outflow boundaries, where cool, dense air undercuts warmer air. The rapid temperature difference forces air upward, creating a narrow band of strong, gusty winds and heavy precipitation. In coastal and lake regions, a rain squall can arrive with little warning, while inland, a snow squall weather event often reduces visibility to near zero.
Are squalls dangerous?
Yes—sudden wind shifts can capsize small boats, topple trees, and trigger whiteout conditions on highways. The distinction between a squall vs storm is mainly duration: a squall is brief and intense, whereas a storm may last hours. Always treat a squall seriously; mariners and drivers should reduce speed and seek shelter immediately.
What is the difference between a squall and a gust?
A gust is a single, short burst lasting seconds. A squall persists for at least one minute and often brings a sustained shift in wind direction and precipitation, such as a rain squall or snow squall.
How can I stay safe during a snow squall?
If driving, slow down gradually, turn on full headlights, and pull off the road if visibility drops to near zero. Avoid sudden braking. Wait until the squall passes before resuming travel.
Do squalls occur only over water?
No—while common over lakes and oceans (where cold air meets warm water), squalls also form inland, especially along mountain ridges and across the Prairies during spring cold fronts.
Sources
For broader conditions, see our Canada weather hub or check the latest Toronto Weather for lake-effect squall updates.