Which is greater, station pressure or sea level pressure?

Station pressure refers to the atmospheric pressure measured at a specific location or elevation, such as at a weather station, while sea level pressure is the atmospheric pressure adjusted to sea level. Because atmospheric pressure decreases with altitude, station pressure will generally be lower than sea level pressure unless you are at sea level.

When a pressure reading is taken at higher elevations, the station pressure will be less than the sea level pressure due to the weight of the air above that location being less than the weight of the air at sea level. To convert station pressure to sea level pressure, meteorologists use a formula that accounts for the height of the measuring location above sea level.

In summary, sea level pressure is the greater value because it is adjusted to a common reference point at sea level, providing a standardized measure for comparing weather conditions across different locations.