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Understanding Fronts

Learn about types of air masses, fronts where they meet, and the symbols representing each front type in weather patterns. Copy the notes in red to grasp the concepts easily.

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Understanding Fronts

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  1. Understanding Fronts Draw a picture of the fronts symbols & what is occurring Copy the notes in red

  2. Air Masses • An air mass is a large body of air with very similar temperature & humidity. • Air masses are named based on the region where it develops

  3. Types of Air Masses • Polar continental – cold and dry air mass • Polar maritime – cold and wet air mass • Tropical continental – warm and dry air mass • Tropical maritime – warm and wet air mass

  4. What is a Front? • Definition: where two air masses meet

  5. Types of Fronts • Cold • Warm • Stationary • Occluded

  6. Cold Front • When cold air pushes warm air back • Marked on a map with a blue line and triangles pointing towards the warm air. • Brings thunderstorms – then cooler air Draw this symbol!

  7. Cold Front • Simple 3-D idea: http://www.physicalgeography.net/fundamentals/7r.html

  8. Cold Front http://www.free-online-private-pilot-ground-school.com/images/cold-front.gif

  9. Cold Front • An animation: Draw this diagram!

  10. Warm Front • When warm air pushes cold air back • Marked on a map by a red line with red semi-circles pointed towards the cool air (in the direction the warm air is moving.) • Brings stratus type clouds, and rain or snow. Draw this symbol!

  11. Warm Front • Simple 3-D idea: http://www.physicalgeography.net/fundamentals/7r.html

  12. Warm Front http://www.free-online-private-pilot-ground-school.com/images/warm-front.gif

  13. Warm Front • An animation: Draw this diagram!

  14. Stationary Front • When two air masses meet, but stay mostly still (Neither is pushing the other back) • Marked by alternating blue lines & triangles and red lines & semi-circles • Brings rainy weather Draw this symbol!

  15. Occluded Front • Signals a fast approaching cold front (very cold air meets cold air) • Marked by a purple line with alternating triangles and semi-circles pointing in the direction of the frontal movement. • Steady rain, then colder weather.

  16. Occluded Front • Simple 3-D idea: Draw this diagram! http://www.physicalgeography.net/fundamentals/7r.html

  17. Occluded Front http://www.free-online-private-pilot-ground-school.com/images/occluded-front.gif

  18. Journal Questions What are the four types of air masses? (think humidity and temperature) What type of air mass do you think would develop over Alaska? (Hint: two words) What type of air mass do you think would develop over the Pacific Ocean near Hawaii? (Hint: two words)

  19. Journal Questions cont. 4. What type of front occurs when warm air pushes back cold air? 5. What type of front is associated with thunderstorms and then cooler weather. 6. Label the four symbols for the four types of fronts.

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