In the latest part, I tried to explain how High and Low pressure system works. In this part I will continues on the same path and go deeper into them. A High Pressure system has often nothing interesting to point out, instead we will focus on storms aka a low pressure system. The only interesting with a high pressure system is that is usually cloudless.
Low pressure system can deepen or developed as it continues its path, the mean path is towards the east ( UK to Sweden to Russia) in the northern hemisphere. When the system deepens the winds grow stronger and the clouds gets bigger. In the centre of the system the winds goes upward and clouds forms. Why does the wind go up-wards ? The answer to that question is not easy to explain in layman terms, but I will try: The storm system need to have a mass-balance. When new air moves into the centre, the system needs to send away some to preserve the mass-balance.
A tropical cyclone is also a low pressure system, but is still a little different and I will describe them in the next Weather School
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If you wants to know more about low-pressure system, you only need to ask in a comment.
Hope you like it.
//Osced
