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Weather > Weather > Flashcards

Weather Flashcards

1
Q

Flying from hot to cold

A

From high to low look out below

Your altimeter will read a higher altitude than actual

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2
Q

The amount of moisture that air can hold is directly dependent on

A

Temperature

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3
Q

The amount of water vapor present in the atmostphere is

A

Humidity

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4
Q

Dew point

A

The temperature at which air must be cooled to become saturated with water vapor

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5
Q

Convective currents

A

Upward and downward motion

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6
Q

Wind

A

Horizontal motion

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7
Q

High pressure

A

Cold temperature

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8
Q

Low pressure

A

Warm air

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9
Q

Surface based Temperature inversion

A

On cold clear nights when the temperature of the earths surface is cold and can cause turbulent conditions

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10
Q

Normal temperature inversion

A

Temperature of air rises with altitude which are normally shallow layers of smooth air.

If relative humidity is high it can contribute to clouds, haze, or fog

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11
Q

Mountain waves

A

Formed when strong winds blow perpendicular across a mountain range.

When sufficient moisture is present, mountain waves produce cap clouds, CCSL, ACSL, and rotor clouds

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12
Q

Taking off in a headwind or tailwind?

A

Head wind because a tailwind will decrease decrease performance

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13
Q

Crosswind correction for taxi

A

Tailwind-down and away

Headwind- into with neutral aileron

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14
Q

Cloud classification

A

High, middle, and low, and vertical development

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15
Q

What is needed for clouds to form

A

Water vapor

Condensation nuclei (dust, salt, or smoke)

A method by which air can be cooled

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16
Q

Low clouds

A

At or below 6500

Stratus, stratocumulus, and nimbostratus

Low ceilings hampering visibility

17
Q

When air cools and reaches its saturation point

A

The invisible water vapor changes into a visible form

18
Q

Cumulo

A

Fluffy

19
Q

Nimbo

A

Raining

20
Q

Middle clouds

A

6500-20000

Altostratus and altocumulus

May be turbulent and contain moderate icing

21
Q

High clouds

A

20000 and above

Cirrus, cirrostratus, and cirrocumulus

Pose no real threat to turbulence

22
Q

Unstable air clouds and conditions

A

Cumuliform clouds

Showery precipitation

Rough air

Good visibility

23
Q

Stable air clouds and conditions

A

Stratiform clouds and fog

Continuous precip

Smooth air

Poor viz

24
Q

Thunderstorms

A

Moisture/sufficient water vapor
Lifting action
Unstable air/unstable lapse rate

25
Q

Cumulus stage of thunderstorm

A

Lifting action, moisture and instability, clouds continue to increase in vertical height

26
Q

Mature stage of thunderstorm

A

Within 15 minutes, the most violent time period, rain or hail, down-rushing air increases surface winds and decrease temperature, anvil shape at the top

27
Q

Dissipating stage of thunderstorm

A

Downdrafts spread out and replace the updrafts needed to sustain the storm

28
Q

Type of thunderstorm

A

Air mass thunderstorm

Steady state thunderstorm

29
Q

Steady state thunderstorm

A

Updrafts become stronger snd last much longer than air mass thunderstorm

30
Q

Air mass thunderstorm

A

Occur at random in unstable air last only and hour or two and produce only moderate wind gusts

31
Q

Wind shear/ LLWS

A

Sudden drastic change in wind speed or direction over a very small area

LLWS- commonly associated with passing frontal systems, thunderstorms, and surface temperature inversions

32
Q

Microburst

A

Horizontal diameter of 1-2 miles

Depth of 1000 ft

Lifespan 5-15 minutes

Downdrafts of up to 6000 fpm

Hazardous wind direction changes

33
Q

Virga

A

Rain that evaporated before hitting the ground

Intense rain shaft

34
Q

Thunderstorm and hail

A

Hail should be anticipated with any thunderstorm,especially beneath the anvil

1/2 inch and greater size hail can damage an aircraft in a few seconds

35
Q

Icing conditions for clear, mixed, and rime

A

This may occur in thunderstorm updrafts which support large amount of water and large droplet sizes

From 2 to -10 C = clear
From -10 to -15C = mixed
From -10 to -20C = Rime

36
Q

With ice how is ice predicted to disrupt with the airfoil

A

Destroys or interrupts smooth laminar airflow and causes an increased parasitic drag

37
Q

If you’ve got ice in the wings what would you do

A

Get lower in elevation, point the airfoil towards the sun, get to the nearest airport snd land

38
Q

How far does FAA recommend you stay away from a T-storm

A

20 miles

39
Q

What are other obstructions to visibility

A

Smoke from wildfire

Volcanic ash contains rock and glass particles

Haze from air pollution

Weather (1 decks)

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