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Download Air Masses and Fronts - Pequot Lakes Schools
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Air Masses and Fronts Meteorology Air Masses • Classified by temperature and humidity – Tropical: Warm, form in tropics, low pressure – Polar: cold, form near poles, high pressure – Maritime: form over oceans, humid – Continental: form over land, dry Fronts • Colliding air masses Cold fronts • Cold air “undercuts” warm air. Front moves quickly. If the warmer air mass contains enough moisture, possible storms, clouds, rain (vertically developing clouds) followed by clear, cool weather. Warm fronts • Warm air “over-rides” cool air. Front moves slowly. If the warmer air mass contains enough moisture, clouds (stratus) and rain may occur for several days followed by warmer, more humid weather. Stationary Fronts • Neither air mass has enough force to move the other. Weather depends on moisture content of air masses. Occluded Fronts • Most complex front. Involves three air masses: cool, cold, warm.
