High Pressure: cold air molecules, more dense air molecules, air sinks, clear skies, nice weather, air moves clockwise, barometer rises, "H" on a map, Low Pressure: warm air molecules, less dense air molecules, air rises, clouds form, moisture in air condenses, air moves counterclockwise, precipitation occurs, barometer lowers, "L" on a map, occurs near fronts,

Pressure Systems - Meteorology

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