Severe Storm Essay

750 Words3 Pages
A severe thunderstorm, by the definition provided by the Bureau of Meteorology can be hail with a diameter of 2 cm or more (about the size of $2 coin), wind gusts of 90 km/h or greater, flash floods, which is often the result of slow moving thunderstorms that causes a small area to receive most of the rain, tornadoes which are the rarest and most violent of the thunderstorm phenomena, or any combination of these. During a thunderstorm there will definitely be lightning and thunder but it is known that when struck, people do not glow or ‘fry to a crisp’ although the heart and breathing are often affected. Although most thunderstorms do not reach the level of intensity needed to produce these dangerous phenomena, all of them do produce lightning which can cause injury, damage, and even death. Thunderstorms occur throughout the world including the Polar Regions. Sever storms occur frequently in tropical rainforest area. In Australia, different areas are affected by storms at different times. For example, in northern Australia severe storms are uncommon during the dry winters. Sever storms relating to winter cold fronts are common in south-western Australia and south-eastern Australia. Most severe storms occur from September to March. Severe storms are most frequent in NSW, QLD and sections of WA and are least common in Tasmania. They are much localized events and are confined to a small area which is the main reason of the underestimation of its damage. Thunderstorms are formed when warm and humid air rises. This is the result of factors such as solar heating or when air is forced uphill. As the humid air rises, it cools and condenses to form a cloud. As more humid air rises the cloud grows in size, extending higher and the water droplets therefore grew larger. The higher the cloud rises, the more chance there is that ice crystals may form because of the low
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