Is the weather forecast bottle scientific

Look at the introduction of Taobao. It is predicted according to the change of air pressure, and it is said that it is sunny, high pressure, rain and low pressure. There is nothing wrong with this sentence itself, but the high and low pressure in meteorology are relative, which does not mean that the absolute value is high pressure, but the absolute value is low pressure. In addition, the atmospheric pressure itself is diurnal, and sometimes it is quite obvious. There is also that rain on sunny days is not only related to air pressure.