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Meteorology > Low Level Winds > Flashcards

Low Level Winds Flashcards

1
Q

An anometer measures black at blank meres?

A

Wind -10 m

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2
Q

Hurricane force winds are winds above blank know

A

64

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3
Q

A squall is a gust lasting more than blank

A

1min

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4
Q

What is a gust?

A

Increase 10knots more than average.

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5
Q

When wind rotates anticlockwise, it is said to be blanking

A

Backing

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6
Q

When wind rotates clockwise, it is said to be blanking

A

Veering

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7
Q

▪ Friction Force (below 1,000 ft - x,000ft above the surface)

A

3000ft

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8
Q

What is a Foehn wind? It is an adiabatically heated wind blowing down a mountain side. The temperature on the lee side is normally higher/lower than on the windward side of the mountain at the same level.

A

Higher

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9
Q

What happens to wind if the pressure gradient remains constant in a high pressure system?

A

Increases

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10
Q

What happens to wind if the pressure gradient remains constant in a low pressure system?

A

Decreases

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11
Q

High to low look out blank

A
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12
Q

If an observer stands with their back to the wind the lower pressure is on their
left/right in the northern hemisphere

A

Left

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13
Q

Coriolis effect reduces and wind speed blanks.

A

Decreases

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14
Q

What happens to wind speed as you descended with the friction layer?

A

It decreases

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15
Q

Over land, as we descend , what degree of wind change occurs?

A

30

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16
Q

Back slack and crack

A
17
Q

Why is there a sea breeze?

A

Land cools faster than ocean so rises.

18
Q

Why does land breeze occur?

A

At night the sea is warm

19
Q

Where does the bora occur and what is it?

A

Adriatic - cold air thats above 100kts

20
Q

What is the name of the cold and dry air that is channeled through the alps in the south of france?

A

The mistral.

21
Q

Whats the pampero?

A

Cold wind in south america.

22
Q

Blank is key for the development of mountain waves

A

Stability.

23
Q

True or false : mountain waves can exceed the structural capability of the aircraft.

A

True

24
Q

You are approaching an airport located in strong wind conditions. The visual approach procedure requires you to fly into this wind through a valley on the final approach at 1500 ft.

When flying through the valley, the wind speed will (1) _____ due to convergence and the true altitude will be (2) _____ than the indicated altitude.

A

Increase less

25
Q

Geostrophic wind is perpendicular/parallel to the horizontal pressure gradient force.

A

Perpendicular

Meteorology (23 decks)

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