A body of air with horizontally uniform levels of temperature, humidity, and pressure.
- The other process to consider is the temperature of the body that the air mass travels across.
- The air mass bringing the coldest temperatures is the polar continental mass that comes in from the Soviet Union.
- The path taken by a cold air mass largely determines the location of a snowfall, and occasionally a northward-moving pool will bring snow along the Great Divide as far north as southern Queensland.
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