"air pressure (adjusted to sea level) is reported in the station model as a coded number to the nearest tenth of a millibar (mb). to decipher the plotted pressure value, first place a decimal point between the second and third numbers from the left. then add either a "9" or "10" to the left so that the resulting number falls within the range of air pressures that could occur at sea level (almost always between 950 mb and 1049 mb). for example, a plotted value of 126 represents 1012.6 mb and 863 denotes 986.3 mb. the air pressure reported at binghamton was mb."