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Low pressure area

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High and low pressure areas

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Animation of weather at low- and high-pressure area's

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How to create high and low pressure systems at home

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Isang bagong Low Pressure Area, nabuo sa loob ng Philippine Area of Responsibility | 24 Oras

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High and Low pressure areas or the Coriolis Effect and the Anticyclone

A low-pressure area, low, low area or low is a region on the topographic map where the air pressure is lower than that of surrounding locations. Low-pressure systems form under areas of wind divergence that occur in the upper levels of the atmosphere. The formation process of a low-pressure area is known as cyclogenesis. Within the field of meteorology, atmospheric divergence aloft occurs in two areas. The first area is on the east side of upper troughs, which form half of a Rossby wave within the Westerlies. A second area of wind divergence aloft occurs ahead of embedded shortwave troughs, which are of smaller wavelength. Diverging winds aloft ahead of these troughs cause atmospheric lift within the troposphere below, which lowers surface pressures as upward motion partially counteracts the force of gravity.
  • Formation 

  • Climatology 

  • Associated weather