Severe thunderstorms can cause significant damage through strong winds, large hail, tornadoes or flash flooding. The warmer months, from September to March, are the peak season for severe thunderstorms, because of the added warmth and moisture in the air. But we can also get severe thunderstorms in the cooler months when they're mostly connected to cold fronts. Know your weather. Know your risk. Keep up to date with the latest forecasts and severe thunderstorm warnings on the Bureau website and