qThe pressure
value shown is the measured atmospheric pressure
adjusted to sea level.
qThe units used are “mb”.
qTo save space,
the “thousand” and the “hundred” values, and the decimal
point are dropped.
č So “138” means 1013.8 mb
To decode the
value of pressure on the station model, add a 9 if the first number is 7, 8, or 9;
otherwise add a 10.