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Important Weather Content (Classification of Air Masses (Equatorial:…
Important Weather Content
Classification of Air Masses
Equatorial: originate in low latitudes.
Polar/Arctic: originate in high latitudes near Earth´s poles.
Continental: originate in low latitudes.
Air Masses
Definition: An air mass is a large body of air that had relatively uniform temperature and moisture conditions at any given altitude.
Formation: An air mass forms when a portion of the air in the lower atmosphere stays over a relatively uniform region of Earth´s surface, for several days, because air tends to to assume the temperature and moisture conditions of the region beneath it.
Fronts
Stationary Fronts
Types of Precipitation: heavy precipitation at any given area.
Changes of temperature: there is not a big change of temperature.
Motion: does not move.
Definition: A stationary front is a front that does not move.
Changes in the Wind: not a big change of wind.
Changes in pressure: there is no pressure.
Cold Fronts
Types of precipitation: showers and thunderstorms.
Changes in temperature: drops suddenly.
Motion: move faster than warm fronts.
Definition: cold front occurs when a cold air mass moves into an area that was previously occupied by a warm front.
Changes in wind: gust winds that tend to shift directions.
Changes in Pressure: the pressure will start to increase
Warm Fronts
Changes in pressure: decrease steadily
Changes in the Wind: causes the wind to shift from the southeast to the southwest.
Types of precipitation: sometimes thunderstorms, or no precipitation at all.
Changes in temperature: decreases
Motion: moves slower than cold fronts.
Definition: a warm front occurs when a warm air mass moves into an area that was occupied my a cold air mass.