1. 4 3 . 5
Winds

2. Winds within a high
Winds blow clockwise and outwards. H

3. Area of Divergence
A flow of air outwards from a region and is associated with highs. Sinking air compensates for the flow of air outwards.

4. Winds within a low
Winds blow counter-clockwise and inwards. L

5. Area of Convergence
The flow of air into an area of low pressure is accompanied by rising air allowing the excess accumulation to escape.

6. Land Breeze Blows at night
Land becomes cooler faster than water causing a high over the land
Wind blows from the land (high pressure area) towards the water (low pressure area)

7. Land Breeze L H Warm Sea causes Low Pressure over the sea.
Cool land causes High Pressure over the land L H
Wind blows from high to a low

8. Sea Breeze Occurs during the day
Land heats faster than water causing a low over the land
Wind blows from the sea (high pressure area) towards the land (low pressure area)

9. Sea Breeze L H Warm Land causes Low Pressure over the land
Cool Sea causes High Pressure over the sea L H
Wind blows from high to a low

10. NOTE: You must use the buttons in the Confirmation Stage

11. Meteorology Winds Let's try a few review questions on Meteorology:
Question #1 - Match
A flow of air outwards from a region and is associated with highs. Sinking air compensates for the flow of air outwards.
The flow of air into an area and is
accompanied by rising air to permit
the excess accumulation to escape.
Area of divergence A
Area of convergence B
Area of divergence A
Area of convergence B

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15. Meteorology Winds Let's try a few review questions on Meteorology:
Question #2 - At night land cools faster then water forming a higher pressure area. The result is wind blowing from the land to the sea. This is known as A
Land breeze B
Sea breeze C
Wind shear
Jet stream D

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18. Diurnal Variations Daily variation of the wind
Caused by surface heating during the day
Causes turbulence in lower levels which transfers the stronger upper level winds to the surface
This causes surface winds to veer an increase during the day
Surface winds back and decrease during the evening when daytime heating stops.

19. GUSTS
A rapid and brief increase in the wind speed. It is often associated with rapid fluctuations in the wind direction.

20. GUSTS Rapid peaks and lulls in the wind speed 30 25 SPEED (KNOTS) 2015 10 5
TIME

21. SQUALLS
Similar to a gust but of longer duration. Caused by the passage of a fast moving cold front or a thunderstorm.

22. SQUALLS 30 SPEED (KNOTS) 25 20 15 10 5 TIME AT LEAST TWO MINUTES
SUDDEN INCREASE LASTING
FOR AT LEAST TWO MINUTES
TIME

23. Mechanical Turbulence
Friction between the air and surface features of the earth is responsible for the swirling vortices of air called “eddies”.

24. Tornadoes
Violent, circular whirlpools of air associated with severe thunderstorms and are very deep concentrated lows.

25. Veering and Backing Veer Back the wind changes direction clockwise
wind veers and increase as altitude increases
e.g. 270° to 300 °
wind veers and increases during the day
Back
the wind changes direction counter-clockwise
wind backs and decreases as altitude decreases
e.g. 90° to 60°
wind backs and decreases at night

26. Wind Shear
Sudden “tearing” or “shearing” change in wind speed or direction. Can be very violent.
Jet Stream
Narrow bands of exceeding high speed winds known to exist in higher levels of the troposphere at altitudes ranging from 20,000-40,000 feet. Wind speed is usually knots but may get as high as 250 knots.

27. NOTE: You must use the buttons in the Confirmation Stage

28. Meteorology Winds Let's try a few review questions on Meteorology:
Question #3 - What is a rapid and brief increase in the wind speed? A
Squall B
Gust C
Wind shear
Jet stream D

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31. Meteorology Winds Let's try a few review questions on Meteorology:
Question #4 - When happens to the wind as an aircraft ascends? A
Veer and increase B
Veer and decrease C
Back and increase
Back and decrease D

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34. Meteorology Winds Congratulations!!
You have now completed the Winds lesson of the Meteorology Module. Of course, this lesson is always available to you for future reference if required.
You are now ready to move along to the next Meteorology lesson you have not completed or to any other module you wish. You can advance to the Self Test Module if you feel ready to challenge the final exam.
Good Luck!