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Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars , [ 1 ] 760 mm Hg , 29.9212 inches Hg , or 14.696 psi . [ 2 ]
Get the Chicago, IL local weather forecast by the hour and the next 10 days. ... A series of atmospheric rivers over the last week brought feet of rain and snow to California, as well as wind ...
The South, Southeast and East Coast could experience warmer-than-normal temperatures this spring, NOAA says. The Weather Channel 3 days ago New Outlook: Drought Conditions Expected To Worsen In ...
USA TODAY 4 hours ago Hurricane season 2025 is less than 100 days away, but forecasters have good news In a triumph for research and forecast improvement efforts, the Center's track forecast ...
Atmospheric air pressure where standard atmospheric pressure is defined as 1013.25 mbar, 101.325 kPa, 1.01325 bar, which is about 14.7 pounds per square inch. Despite the millibar not being an SI unit, meteorologists and weather reporters worldwide have long measured air pressure in millibar as the values are convenient.
Standard sea-level conditions (SSL), [1] also known as sea-level standard (SLS), defines a set of atmospheric conditions for physical calculations.The term "standard sea level" is used to indicate that values of properties are to be taken to be the same as those standard at sea level, and is done to define values for use in general calculations.
Get the Chicago, IL local weather forecast by the hour and the next 10 days. ... USA TODAY 3 hours ago ... Stay updated on the ever-changing atmospheric conditions with our comprehensive Weather ...
The new value is the mean atmospheric pressure at an altitude of about 112 metres, which is closer to the worldwide median altitude of human habitation (194 m). [ 10 ] Natural gas companies in Europe, Australia, and South America have adopted 15 °C (59 °F) and 101.325 kPa (14.696 psi) as their standard gas volume reference conditions, used as ...