sea-level pressure

[′sē ¦lev·əl ‚presh·ər] (meteorology) The atmospheric pressure at mean sea level, either directly measured or, most commonly, empirically determined from the observed station pressure.

sea-level pressure

The atmospheric pressure that exists at sea level. It is used as a common reference for analysis of surface-pressure patterns. It can be measured by stations located at sea level or determined from charts showing the station pressure and temperature taken at stations not at sea level. In a standard atmosphere, its value is 29.92 in of mercury, 760 mm, or 1013.2 hectopascals.

sea-level pressure

sea-level pressure