Information to Predict Extreme Weather Tropical Cyclones- Cyclones develop over tropical waters during warmer months. November- April. Bushfires- Wind, temperature, humidity and rainfall all combine to the behaviour of bushfires. They use two types of products to let us know when weather conditions are dangerous. They are called Fire Weather Warning and Total Fire Ban. Floods- The Flood Warning Service, provides effective flood forecasts and warning service in each Australian state/territory. Strong Winds- Winds average 26 knots to 33 knots. Storm Force- Winds average 48 knots to 63 knots Hurricane Force- Winds average 64 knots or more.