Weather Gadgets

March 11, 2008

How a barometer measures air pressure

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We found this article at USA Today very informative on how a barometer works.

Air pressure and differences in pressure are among the most important weather makers.

The centers of storms are areas of relatively low air pressure, compared to pressures around the storm. High air pressure generally brings good weather. Keeping track of how the pressure is changing is important for forecasting the weather.

Differences in air pressure between places cause the winds to blow - air moves from high toward low pressure.

The instruments that measure air pressure are called barometers, from Greek words for weight and measure.

At USATODAY.com

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Posted by Jay Brewer at March 11, 2008 8:29 AM

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