Pegasus FlyAway Kit
48
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Columbia Weather Systems, Inc.
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Relative Humidity
Popularly called humidity. The ratio of the actual vapor pressure of
the air to the saturation vapor pressure.
Sea Level Pressure
The atmospheric pressure at mean sea level, either directly
measured or, most commonly, empirically determined from the
observed station pressure.
In regions where the earth’s surface pressure is above sea level, it
is standard observational practice to reduce the observed surface
pressure to the value that would exist at a point at sea level directly
below.
Wind Chill
That part of the total cooling of a body caused by air motion.
