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Understanding Meteorology Fronts and Air Masses

Learn about the types of fronts in meteorology including cold, warm, stationary, and occluded fronts. Understand air masses and their characteristics based on source region such as maritime or continental, polar or tropical, Arctic. Explore the associated cloud types and precipitation. Weather map symbols and tools to interpret weather maps are also covered.

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Understanding Meteorology Fronts and Air Masses

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  1. METEOROLOGY Chapter 5 Objective 5-4

  2. Objective • Objective 5-4 • Describe different fronts and the associated cloud types and precipitation.

  3. Air Masses • An air mass is a large body of air that takes on the characteristics of the surface over which it forms. • An air mass extends over hundreds to thousands of kilometers. • The temperature and humidity within an air mass vary little in the horizontal.

  4. Classification of Air Masses • Air masses are classified according to their source region: • Maritime or Continental • Polar or Tropical • Arctic

  5. Types of Air Masses http://www.physicalgeography.net/fundamentals/7r.html

  6. Fronts • The boundary between two different air masses is called a front. • There are several different types of fronts: • Cold Front: cooler air is moving in replacing warmer air. • Warm Front: warm is is moving in replacing cooler air. (continued…)

  7. Fronts • Stationary Front: Two air masses are sitting still with very little movement of one replacing the other. • Occluded Front: A cold front has over-taken a warm front forcing warm air up above two cooler air masses.

  8. Cold Front http://www.cs.berkeley.edu/~samw/projects/ay249/0_meteorology/coldfront.jpg

  9. Warm Front http://www.cs.berkeley.edu/~samw/projects/ay249/0_meteorology/warmfront.jpg

  10. Occluded Front http://www.physicalgeography.net/fundamentals/7r.html

  11. Weather Map Symbols http://www.freewebs.com/wonderfulweather/fronts.htm

  12. Weather Maps http://www.atmos.millersville.edu/~lead/Fronts_Module.htm

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