Air Masses and Weather Fronts Subtitle

A pocket of air that has similar properties of temperature and humidity is known as an air mass. Maritime Polar (mP) – Formed over cold oceans Cool/Cold and Humid Maritime Tropical (mT) – Formed over warm oceans Warm and Humid Continental Polar (cP) – Formed over cool land Cool and Dry Continental Tropical (cT) – Formed over warm land Warm and Dry

Different types of Air Masses over the Globe

The location where two air masses meet is known as a front.

Cold Front: warmer air is replaced by colder air. Before While Passing After Temperature Warmer Sudden Drop Steady Drop Pressure Falling Sharp Rise Steady Rise wind South North

Warm Front: cooler air is replaced by warm air Before While Passing After Temperature Cool/Cold Steadily Warmer Warmer then Steady Pressure Falling Level Slight Rise, then Fall

Stationary Front: boundary between warm and cold air that isn’t moving. Often associated with prolonged rainy weather.

Occluded Front: When a cold front outruns a warm front in a large cyclone.

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