What are the two units of air pressure used in weather reports?

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Ask.com Answer for: two units of air pressure used in weather reports
Current weather in Ashburn, VA
clear
65ºF
19ºC
Clear
Tomorrow
82º/68º 28º/20º
Saturday
77º/63º 25º/17º
Sunday
79º/61º 26º/16º
Monday
81º/64º 27º/18º
Source: www.wunderground.com
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Q&A Related to "What are the two units of air pressure used..."
The two most common units used for air pressure in weather reports are: Inches of Mercury and Millibars.
http://wiki.answers.com/Q/What_two_units_of_air_pr...
There are three. Inches, Millibars and Kilopascals. The
http://www.chacha.com/question/what-two-units-of-a...
inHg - measured in inches. hPa - measured in millibars.
http://answers.yahoo.com/question/index?qid=200712...
The two main ones are: Metric - kPa (Kilo Pascals) Imperial - PSI (Pounds per Square Inch)
http://answers.yahoo.com/question/index?qid=201009...
1 Additional Answer

A low pressure rotates counterclockwise and forces air in an upward direction in the Northern Hemisphere, which causes air moisture to condense, creating rain and sometimes thunderstorms. A high pressure rotates clockwise and forces the air to sink, which usually creates pleasant weather conditions, including clear skies for the surrounding area. In the Southern Hemisphere, these pressures spin in the opposite direction and have the opposite effect as they do north of the equator.

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