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  2. Atmospheric pressure - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_pressure

    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 ]

  3. Snowstorm tracking through Northeast, including DC, Philly ...

    www.aol.com/weather/sunday-snowstorm-headed...

    The storm's central barometric pressure would have to plummet 0.71 of an inch of mercury (24 millibars) or more in 24 hours or less, most likely from Sunday morning to Monday morning, with a track ...

  4. National Weather Service - Wikipedia

    en.wikipedia.org/wiki/National_Weather_Service

    The stations measure wind speed, direction, and gust; barometric pressure; and air temperature. In addition, all buoy and some C-MAN stations measure sea surface temperature, and wave height and period. [44] Conductivity and water current are measured at selected stations. All stations report on an hourly basis.

  5. METAR - Wikipedia

    en.wikipedia.org/wiki/METAR

    TSB40 indicates the thunderstorm began at 40 minutes past the hour at 1840 Zulu/UTC, or 1:40 p.m. Eastern Standard Time. SLP176 indicates the current barometric pressure extrapolated to sea level is 1,017.6 hPa (30.05 inHg). P0002 indicates that 0.02 inches (0.5 mm) of liquid-equivalent precipitation accumulated during the last hour.

  6. Get the Boydton, VA local weather forecast by the hour and the next 10 days. ... 30.35 in Pressure ... USA TODAY 1 day ago

  7. 'Bomb cyclone' strikes: 2 dead, widespread power outages in ...

    www.aol.com/news/thousands-left-without-power...

    Bombogenesis is said to occur when a storm's central barometric pressure drops at least 24 millibars in 24 hours. A millibar is a way of measuring pressure. A millibar is a way of measuring pressure.

  8. Westmont, IL Weather - Hourly Forecasts and Local Weather ...

    www.aol.com/weather/forecast/united-states/...

    Get the Westmont, IL local weather forecast by the hour and the next 10 days. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways ...

  9. Barometer - Wikipedia

    en.wikipedia.org/wiki/Barometer

    When atmospheric pressure is measured by a barometer, the pressure is also referred to as the "barometric pressure". Assume a barometer with a cross-sectional area A, a height h, filled with mercury from the bottom at Point B to the top at Point C. The pressure at the bottom of the barometer, Point B, is equal to the atmospheric pressure.