Cold fronts frequently cause rain showers or thunderstorms because they force air in a steep upward direction at the front's edge. Severe weather phenomena, such as thunderstorms, torna-does and hurricanes are all associated with rising air motions and accompanying low-pressure surface Table 2-2. 919-515-3056 Their effects are milder in summer, although clashes between maritime tropical air masses moving north and continental polar air masses move south can cause storms. It contains tools for weather education, including weather games, activities, experiments, photos, a glossary and educational teaching materials for the classroom. One is … Hence, rising air masses and low-pressure areas at the surface are usually associated with clouds and, possibly, stormy conditions (Figure 2-3). The Variation of Mean Atmospheric They also bring about changes in wind direction and atmospheric pressure. Weather Wiz Kids is a fun and safe website for kids about all the weather info they need to know. The formation of precipitation due to the convergence of two air masses. When a cold air mass meets a warm air mass, a front is formed; if the cold air is replacing the warm air, it is known as a cold front. Mostly in summer, these hot, dry air masses form and bring heat to the dry Southwestern regions and northern Mexico. Research III Building, Suite 130 1005 Capability Drive Centennial Campus Box 7236 NC State University. North Carolina State Climate Office. Although air masses spread out horizontally over large distances, they can also reach high altitudes with heights of up to 16 km (10 miles), well into the stratosphere. Continental Tropical. In most cases, the two air masses have different climatological characteristics. Types Of Air Masses. A number of classification systems exist to categorize the major global air masses.

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