The atmospheric pressure at the designated station elevation.

The atmospheric pressure computed using station elevation as the reference datum level. Station pressure is usually the base value from which sea level pressure and altimeter setting are determined.

The true atmospheric pressure, uncorrected to standard conditions at sea level. For example, if you live in the Rocky Mountains, there is less air pressing down on you and the station pressure is lower than at Sea Level. Weather reports generally give barometric pressure corrected to sea level, not station pressure, because this would always show a low pressure area over the mountains, and would make it harder to see the changes in pressure which drive weather systems.