9 Flashcards

1
Q

Stationary Storm systems centered somewhere over the open sea are capable of creating large waves worth heights measuring?

A

Over 31 m (100ft)

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2
Q

On the eastern side of the Rocky Mountains, chinook winds are driest when

A

Clouds form and precipitation falls on the upwind side of the mountains

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3
Q

Chinook winds are typically found in the interior of North America where Canadian prairies and the Great Plains parallel mountain ranges. The winds can be described as ?

A

Warm, dry, downslope air

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4
Q

In south Florida the prevailing winds are ________ because of this the strongest sea breeze is usually observed on Florida’s east coast, and the ______ land breeze on floridas west coast

A

Northeasternly, strongest

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5
Q

The quietest time of day, with least wind usually occurs during the _______, when thermal turbulence above the surface is normally at a minimum

A

Early morning

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6
Q

Clear air turbulence often occurs near ?

A

A boundary of high wind shear

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7
Q

The difference in surface wind speed between morning and afternoon is typically greater on a ??

A

A Clear sunny day rather than a cloudy overcast day

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8
Q

T/F: micro scale circulations range from a few kilometers to about a hundred kilometers in diameter

A

False

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9
Q

A wind rose indicates ?

A

The percentage of time that the wind blows from different directions

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10
Q

T/F: Santa Ana winds are warmed by compression as they flow down an elevated desert plateau .

A

True

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11
Q

A sea or land breeze is caused by ?

A

Temperature differences

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12
Q

Phenomena on the ________ scale can span over 1000s kilometers and last for many days. Mid-latitude cyclones, hurricanes, and fronts are examples of this scale of weather events.

A

Synotic

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13
Q

Over land and over the ocean, wind gusts are caused by?

A

Turbulent eddies

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14
Q

T/F: Prevailing offshore winds in summer carry moisture, cool air, and fog into coastal regions, whereas prevailing onshore breezes carry warmer and drier air into the same locations

A

FALSE

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15
Q

T/F: A valley breeze develops its maximum strength in the early afternoon because they occur when warm air rises up the sides of the valley

A

True

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16
Q

When a sea breeze that is moving west meets a sea breeze moving east, they form ?

A

A sea breeze convergence zone

17
Q

An offshore wind blows

A

From land to water

18
Q

When do dust devils form?

A

Generally they firm on clear, hot, dry days

19
Q

Wind movements near mountains can be quite complex, for example: eddies that form both close to mountains and beneath each wave crest are called?

A

Rotors

20
Q

The wind speed generally increase with height above earths surface because?

A

Friction with earths surface slows the air near the ground

21
Q

T/F: In large weather systems, we see that mesoscale circulations have a longer duration than micro scale circulations

A

True

22
Q

What determines the height of a wave generated in the open ocean?

A

Length of time wind blows over water

23
Q

Particularly in desert valleys, thermally generated eddies typically peak __(when)___ when surface heating processes are most amenable

A

In the afternoon

24
Q

T/F: pilots must be aware that turbulent eddies can occur in conjunction w/ mountain waves, which may extend upwards into the stratosphere.

When these Eddie’s develope in clear air, this form of turbulence is referred to as ______?

A

True, Clear turbulence

25
Q

Compression heating is the main Source of warmth for a chinook wind. T/F

A

True

26
Q

3) What is a serous hazard towards aircrafts which often occurs without warning on bright, and clear, weatherless day?

A

Clear air turbulence

27
Q

Surface winds are generally strongest and most gusty when?

A

In the afternoon

28
Q

During the summer along the coast, a sea breeze is usually the strongest and best developed when?

A

In the afternoon

29
Q

An upper wind direction is reported as 135 degrees. From what compass is the wind blowing?

A

Southeast

30
Q

The summer monsoon in eastern and Southern Asia is characterized by?

A

Wet weather and winds blowing from sea to land

31
Q

During the summer, in humid climates, nighttime clouds tend to form over water during a ______?

A

Land breeze

32
Q

A wind reported as having a direction of 225 degrees would be blowing from where?

A

Southwest

33
Q

A nighttime counterpart of sea breeze circulation is called

A

Land breeze

34
Q

The winter monsoon is eastern and Southern Asia is characterized by?

A

Dry weather and winds blowing from land to sea

35
Q

Thermal turbulence above the surface such as in a desert valley during simmer is usually most severe. When ?

A

During maximum surface heating

36
Q

Clouds and precipitation are frequently found on the downwind side of a large lake. This would indicate that the air on the downwind side is ____?

A

Converging and rising

37
Q

The land/sea breeze, lake breeze, and mountain/valley breeze, are examples of _________. Generated by pressure gradients produced by differential heating

A

Thermal circulations

38
Q

What is an example of micro scale motion?

A

Winds blowing past a chimney