When checking the weather what does the pressure tell you?

Question

When checking the weather what does the pressure tell you?

In: 503

Answer 1

High pressure is caused by air cooling and sinking towards the ground, and low pressure is caused by air warming and rising up into the atmosphere. Low pressure means that air masses will have to move in to replace the rising air, meaning wind and changing weather. High pressure means that the air is settling in and change is not likely.