The relationship between air pressure and rainfall?

Question

what is the relationship between the two and how does it work and what causes it

Answer 1

Low pressure areas are usually regions of bad weather with cloud ,rain and strong winds as air rises over low pressure areas,cools at  higher altitudes and condenses to form  clouds leading to rainfall.On the other hand,high pressure areas usually have a fair weather as the air sinks over a high pressure areas and becomes warmer leading to cloudless sky.

Answer 2

Warm air mass hits cold air mass.  The warm air mass rises creating low pressure.  As the mass rises it cools causing precipitation (rain).

So precipitation usually occurs in areas of lower air pressure.

Answer 3

There is a negative relationship between rainfall and pressure. When the air pressure is lower then more rainfall occurs and when the pressure is higher then less rain falls. When there is low pressure in the atmosphere then the air bubble that is rising is always hotter than the air around. This heated air will gradually but surely rise. As it rises the heated air will cool down. However it will not cool down as fast as the surrounding air. Thus it will remain hotter than the air around and will continue to rise. Low pressure thus leads to unstable air conditions. If the ground is heated then air will rise. The cool air will produce condensation that will ultimately lead to rainfall.

If the conditions in the atmosphere are at high pressure, atmosphere then the air bubble that is rising is always colder than the air around. The heated air will not continue to rise. As it rises it cools down and thus it will cool down much faster than the air around will. High Pressure causes stable air conditions. If the ground is heated then the air will not rise and therefore the rain cannot condense.

Answer 4

Rain is usually associated with low air pressure

In a low pressure system, the air rises and when it rises, the temperature of that air cools. As the air cools, it releases moisture to form clouds, this is becuase cool air cannot hold as much moisture as warm air.

If  enough rising air cools then it will release lots of moisture, the tiny droplets of water in the air will attach to one another and will become too heavy to stay afloat in the air and will fall in the form of rain, ice or snow