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FRONTAL WEATHER

FRONTAL WEATHER. Property of Lear Siegler. ELO 1:. Action: The student will identify the characteristics common to all fronts. Condition: Given pertinent information about fronts Standard: IAW FM 1-230 para 10-1, 10-2. WARM. COLD.

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FRONTAL WEATHER

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  1. FRONTAL WEATHER Property of Lear Siegler

  2. ELO 1: Action: The student will identify the characteristics common to all fronts. Condition: Given pertinent information about fronts Standard: IAW FM 1-230 para 10-1, 10-2

  3. WARM COLD FRONT - BOUNDARY BETWEEN AIR MASSES OF DIFFERENT DENSITY Property of Lear Siegler

  4. H cP H L mT Property of Lear Siegler

  5. Frontal weather is caused by the lifting of warm moist air by colder more dense air. ALL FRONTS HAVE A TEMPERATURE INVERSION

  6. FRONTAL DISCONTINUITIES • TEMPERATURE • DEWPOINT • PRESSURE “FALL THEN RISE” • WIND SHIFT : APPROX 90° DRIFT CORRECTION TO THE RIGHT Property of Lear Siegler

  7. ELO 2: Action: The student will identify the general characteristics of a cold front. Condition: Given pertinent information about cold fronts Standard: IAW FM 1-230 para 10-3

  8. CHARACTERISTICS OF A COLD FRONT • Slope • Clouds • Width of weather band • Winds • Direction of movement • Speed • Symbol

  9. Average Slope – • 1:80

  10. 25 kts Steep Slope 1:50

  11. 25 kts Shallow Slope 1:100

  12. a. Slope -1:80 b. Cumuliform clouds c. 50 mile wide band of coverage d. Winds NW behind front, SW ahead e. Moves southeast f. 25 knots average speed 25 kts

  13. Squall Line Possible hail, destructive winds, and tornadoes

  14. Property of Lear Siegler

  15. Property of Lear Siegler

  16. SQUALL LINE Property of Lear Siegler

  17. Squall Line

  18. Squall Line

  19. ELO 3: Action: The student will identify the general characteristics of a warm fronts. Condition: Given pertinent information about warm fronts Standard: IAW FM 1-230 para 10-4

  20. CHARACTERISTICS OF A WARM FRONT • Slope • Clouds • Width of weather band • Winds • Direction of movement • Speed • Symbol

  21. a. Slope - 1:200 b. Stratiform clouds predominate c. 400-600 mile band of coverage d. Wind SW behind, SE ahead of the front e. Moves Northeast f. 15kts avg speed CS AS NS ST

  22. nimbo- Stratus

  23. a. Slope - 1:200 b. Stratiform clouds predominate c. 400-600 mile band of coverage d. Wind SW behind, SE ahead of the front e. Moves Northeast f. 15kts avg speed 15 kts

  24. Polar Air Cold Air Moving Southward Receding Cold Air Receding Cold Air Tropical Air

  25. ELO 4: Action: The student will identify the general characteristics of a stationary front. Condition: Given pertinent information about stationary fronts Standard: IAW FM 1-230 para 10-6

  26. CHARACTERISTICS OF A STATIONARY FRONT • Slope – 1:200 • Clouds - Stratiform • Width of weather band – 400 to 600 miles • Winds – 180o wind shift • Symbol

  27. Stationary Front H H Property of Lear Siegler

  28. CHARACTERISTICS OF A STATIONARY FRONT • Slope – 1:200 • Clouds - Stratiform • Width of weather band – 400 to 600 miles • Winds – 180o wind shift • Symbol • Direction of movement – unpredictable • Speed – 0 to 5 knots

  29. Stationary Front L Property of Lear Siegler

  30. ELO 5: Action: The student will identify the characteristics of an open wave. Condition: Given pertinent information about open waves Standard: IAW FM 1-230 para 10-7

  31. OPEN WAVE L

  32. Open Wave L Property of Lear Siegler

  33. L Cold Front Warm Front Property of Lear Siegler

  34. Property of Lear Siegler

  35. A B Property of Lear Siegler

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