Have You ever before Wondered...You are watching: How are pressure measurements related to weather prediction

What go a barometer measure?How much pressure walk the setting exert on you at all times?How do transforms in air push signal alters in the weather?

Can you feel the pressure? It"s around you…all the time…everywhere you go. What is it? Atmospheric press — often referred to merely as air pressure — is the consistent force exerted on girlfriend by the weight of small particles the air.

These small air particles, referred to as air molecules, can"t be seen, but they are all approximately you. They have actually weight, which method they continuous “push" down on you. If you look right up in the air, you deserve to imagine a tall shaft of air above your head reaching all the way to the sheet of the Earth"s atmosphere.

The load of that obelisk of wait is the quantity of air push exerted ~ above you. If you relocate to a higher elevation (climb a mountain, because that example), the air press will be lower. Why? The length of that shaft of air over you has diminished by the quantity of your boost in elevation.

As you relocate to a greater elevation, girlfriend may notice that her ears need to “pop." This balances the pressure between the inside and outside of her ear. Because there room fewer air molecules the higher you go, girlfriend will likewise probably must breathe faster to breathe in an ext molecules to make up for the deficit.

Air molecules also take increase space. Because there has tendency to it is in a the majority of empty space between air molecules, air can either fill a large area or it deserve to be compressed come fit right into a smaller sized area. When it"s compressed, air is stated to it is in under high pressure.

Earth"s atmosphere presses down on you through a force of nearly 15 pounds every square inch. You might be wonder why it doesn"t feel that heavy or why you"re not crushed under the weight. Remember that point you do called breathing?

The wait inside your body balances out the pressure from air in the atmosphere, which avoids you from gift squished by the press of the atmosphere. Friend don"t sense air push as a continuous force, due to the fact that the air within you balances exterior pressure and you"re supplied to that feeling.

If you watch the weather report frequently, you"re certain to listen the weatherman talk about barometric pressure. Weather forecasters usage a special tool called a barometer to measure air pressure.

Barometers measure atmospheric press using mercury, water or air. You"ll usually hear forecasters offer measurements in either inches the mercury or in millibars (mb). Forecasters use changes in air push measured with barometers come predict short-term changes in the weather.

Changes in air push signal the motion of high- or low-pressure locations of air, dubbed fronts. Air molecule in high pressure locations tend to circulation toward low push areas. We contact this circulation of air molecule wind. The bigger the distinction in pressure between areas, the stronger the winds will certainly be.

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As weather forecasters monitor air pressure, fall barometer measurements deserve to signal that poor weather is ~ above the way. In general, if a short pressure mechanism is top top its way, be prepared for warmer weather with storms and rain. If a high pressure device is coming, you can expect clear skies and also cooler temperatures.

Try the Out

How"s the weather? Gather with each other a couple of friends or household members to check out one or an ext of the following fun activities:

How specific is the weatherman wherein you live? save track and find out! end the course of the next week, watch the weather report at the same time each day. Take it notes in a journal. Make certain to record predictions because that temperature and precipitation. Then make careful observations about the weather on her own. Did the weatherman acquire it right? how often? would certainly you choose to be a weather forecaster one day? Why or why not?