Question

How are pressure measurements related to weather prediction?

Answer 1

Hint: The manner in which the atmospheric pressure of an area on Earth changes gives a fair idea of the change in weather of that region. This data can be used to know the pattern of the weather in an area.

Complete answer:
The atmospheric pressure in an area is used by the meteorologists around the world to forecast the weather of a region. They use the barometric readings which provide an accurate and real time data, sometimes with a graphical analysis as well to predict weather conditions.
If the drop in pressure is abrupt or sudden, it indicates the building up of a low-pressure area in the region. Since winds always blow from high pressure to low pressure regions, the region might face a cyclone in the coming hours. Also, if the low-pressure area expands, the intensity of the cyclone can be predicted as low, moderate or high. This is an important way to predict the destruction and adequate measures can be taken within the time limit estimated.
Similarly, if the pressure in the barometer is increasing very fast, then it indicates that a region of high pressure is building up in that region. This leads to an anticyclone which is a reverse of the cyclonic phenomenon. Also, it indicates that the temperature of the region is expected to fall very fast and cold conditions might arrive. Sometimes, an anticyclone is also accompanied by a few showers of low degree.
A gradual change in atmospheric pressure indicates fine weather conditions.

Note: The atmospheric pressure is measured with a barometer which was invented by E. Torricelli who was a physicist. He used mercury to support the atmospheric pressure.