How to Find Out If the Barometric Pressure Is Falling in Our Area
Atmospheric pressure is best defined as the amount of downward force exerted by the weight of the Earth's atmosphere. We use a barometer to measure atmospheric pressure. Barometric pressure is most commonly measured in inches of mercury. Air pressure tends to move from high pressure to low pressure. When barometric pressure falls in an area, the weather is likely to become more stormy, and when barometric pressure rises, the weather is likely to clear up. It is easy to find out if the barometric pressure is falling in your area.
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Instructions
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Purchase a barometer. Most barometers have a setting arm that you can align with the current barometric pressure. Check it every few hours to see if the gauge on the barometer moves lower than what you have it aligned at. If it moves lower, the pressure is falling.
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Watch the sky conditions outside. If you have clear skies and then notice that clouds are moving in, the pressure is most likely falling. If your skies are already cloudy, watch for precipitation to start to fall. These conditions are almost always associated with falling barometric pressure.
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Look at a three-hour pressure fall map online (see last link in References). These maps will show you the three-hour trend of barometric pressure across a region. Simply look for your location on the map and check the map to the map legend, and you will be able to tell if your barometric pressure is falling, staying stable or rising.
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Tips & Warnings
You can also watch your local TV news weather forecast. The meteorologists usually give the barometric pressure and how it's trending. If they are predicting the weather to become more unsettled, it's almost a guarantee that the barometric pressure will be falling.
