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Pressure is force divided by area. An increase in pressure is due to atmospheric gas (particles) being forced downwards. Due to thermodynamics this increase in air pressure leads to heating ( pv=nRT ) thus preventing condensation (no clouds = sun). Low pressure is due to air moving upwards leading to expansion and therefore cooling of the gas promoting condensation (clouds = rain)
Here is how low pressure relates to bad weather... given the right conditions.
High pressure generally relates to "nicer" weather, while low pressure often relates to bad weather. This is because these pressure systems have their own general characteristics. One characteristic I like to use while observing weather conditions such as pressure and making forcasts is the rotational direction of these pressure systems. For example, low pressure systems rotate counterclockwise in the northern hemisphere, while high pressure systems rotate clockwise. With low pressure systems, counterclockwise rotation causes converging winds. This means that the winds are coming together. Where are they coming from? Pressure moves from high pressure systems to low pressure systems. Therefore, moving air causes wind. When this air converges (as in a low pressure, counterclockwise system), due to its rotation, the air gets forced downward. In general, when this air is forced to the ground and has nowhere to go, it pushes out and back up around the center of the low pressure system. This upward movement of air causes instability in the atmosphere, which equals clouds, especially when the air being drawn in (converging air) has a different temperature than the air that it is replacing. Warm air below cooler air equals instability and rising thermals (rising hot air). There are many variables left out in this simple explaination, but in general it quickly answers the question. High pressure systems diverge air and therefore are the opposite. One has to remember, however, that these systems can interact in very complicated and unpredictable ways.
-RJS
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoHigh pressure is indicative of descending air, which heats and dries as it descends. Since it's warm and dry, it has no clouds, so the day is sunny. It also tends to be calm.
Wiki User
∙ 12y agoThey bring warm weather if it is coming from the south and cold weather if it is coming from the north.:]
Wiki User
∙ 12y agoyes it is
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When air pressure is low is the weather sunny and bright?
No. Generally low pressure brings clouds and precipitation.
What good weather is associated with which type of pressure system?
high pressure=sunny;good weather
How does barometric pressure influence weather?
High pressure situations are generally associated with fair, sunny weather. As high pressure is an area of sinking air, and air tends to dry out as it sinks, leaving sunny skies.
It is a cold but a sunny day what type of system is associated with the weather?
High pressure
Can you say if it is bright sunny day in your town it is also bright sunny day in other part of your country?
You can say it, but there is no guarantee you would be right.
When the weather is sunny and bright how is the air pressure?
I think the air pressure would be high.
When air pressure is high the weather is usually sunny and bright -- true or false?
True, generally.
When air pressure is low is the weather sunny and bright?
No. Generally low pressure brings clouds and precipitation.
What type of pressure brings sunny condition?
Usually a high-pressure area brings sunny weather.
What weather does high pressure create?
Sunny
Sunny and calm weather comes with high?
Pressure.
What type of weather do low and high pressure systems bring with them?
A high pressure system means sunny and fair weather.A low pressure system means precipitation
What good weather is associated with which type of pressure system?
high pressure=sunny;good weather
Why is does high pressure often bring sunny skies?
eat my dick
On a bright sunny day the average atmospheric pressure is what?
When it is bright and sunny outside, it is typically an indication that high air pressure is present. When pressure begins to drop, a disturbance can be near and weather conditions will begin to deteriorate.
What is the meaning of the light below the battery indicator in Nissan sunny?
It tells you if its low or high. Its dim when its low. Bright when it's high.
How does barometric pressure influence weather?
High pressure situations are generally associated with fair, sunny weather. As high pressure is an area of sinking air, and air tends to dry out as it sinks, leaving sunny skies.
