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Ascent Spring Training > Weather Recurrent A v4.0 > Flashcards

Weather Recurrent A v4.0 Flashcards

1
Q

Define a warm front?

A

The transition zone where a warm air mass is replacing a cold air mass.

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2
Q

Define a cold front?

A

The transition zone where a cold air mass is replacing a warmer air mass.

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3
Q

Define an occluded front?

A

A cold front wraps around a low into a warm front.

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4
Q

____ percent of inflight icing-related accidents occur between November and March

A

80

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5
Q

Be alert for icing conditions when the temperature is at or below _____ C

A

+10 C

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6
Q

What three things are necessary for icing?

A
  • Sub-freezing temperatures
  • Visible moisture
  • Vertical motion
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7
Q

Freezing rain requires a _______ __________ (2 words)

A

temperature inversion

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8
Q

A significant difference between freezing rain and freezing drizzle is that with drizzle, you cannot _____________

A

assume that warmer temperatures are above you

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9
Q

When it comes to icing, describe the following terms: Trace, Light, Moderate, Severe

A

Trace- Ice becomes noticeable
Light- Requires occasional cycling of manual deicing systems
Moderate- Requires frequent cycling of the manual deicing systems
Severe- Rate of accumulation exceeds the de-icing system capabilities

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10
Q

How long is a Sigmet good for?

A

4 hours

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11
Q

What is the difference between FOG and MIST?

A

The visibility, if it is less than 5/8 you will see FOG. If it is more than 5/8 you will see MIST (or BR)

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12
Q

What are preconditions necessary for radiation fog? (3 things)

A
  • Calm/Light winds
  • High relative humidity
  • Rapid cooling
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13
Q

Where is advection fog most common?

A

Near large areas of water

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14
Q

How is steam fog formed?

A

Warm body of water and cold air.

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15
Q

How does upslope fog form?

A

Air blows up terrain, it expands and cools, the air eventually reaches saturation

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16
Q

What is another name for frontal fog?

A

Precipitation fog

17
Q

How does frontal fog form?

A

Rain falling from warm air aloft evaporates at or near the surface under light wind conditions.

18
Q

Where is frontal fog most likely to occur?

A

In a warm front

19
Q

What is the name of clouds above 20,000 AGL?

A

Cirrus

20
Q

What is the name of clouds between 6,500 AGL and 20,000 AGL?

A

Alto

21
Q

What is the name of clouds below 6,500 AGL?

A

Stratus

22
Q

What type of clouds in the morning may precede afternoon thunderstorms?

A

Altocumulus

23
Q

Why is it important to be aware of Lenticular Clouds?

A

It is an indication of mountain waves

24
Q

What three things must you have to “grow” a thunderstorm?

A
  • Moisture
  • Instability
  • Lifting Mechanism
25
Q

What signals the Mature stage of a thunderstorm?

A

The mature stage

26
Q

What signals the Dissipating stage of a thunderstorm?

A

Light rain and surface cooling

27
Q

When can pilots be more reckless? (3 items)

A
  • They are behind schedule
  • It is night
  • Aircraft in front are also flying into bad weather
28
Q

What is a squall line?

A

A narrow band of active thunderstorms

29
Q

How far out in front of a thunderstorm could you encounter a gust front?

A

15 miles

30
Q

At what temperatures could you expect the most severe accumulation of clear icing associated with a thunderstorm.

A

Between 0 and -15C

31
Q

Only about ____% of thunderstorms are capable of producing microbursts.

A

5%

32
Q

What is one of the biggest limitations of nexrad radar? What is another limitation?

A

Time delay, echo tops reports

33
Q

A microburst can produce winds up to what speed?

A

170 mph

34
Q

What is windshear?

A

Anytime that a wind velocity change greater than 15 knots per 1000 feet, and/or a change in wind direction of 30 degrees or greater per thousand feet is encountered

35
Q

What is the principle cause of weather?

A

water vapor constantly being absorbed and released in the atmosphere

36
Q

Atmospheric pressure is reduced by about half at what altitude?

A

18,000 feet

37
Q

GFA

A

Graphical Forecast for Aviation

38
Q

What does FAR 135.219 require?

A

Requires that before takeoff, the latest weather reports or forecasts or any combination of them, must indicate that weather conditions at the estimated time of arrival will be at or above authorized IFR landing minimums.

39
Q

If an airport doesn’t have weather reporting, how must a part 135 flight proceed?

A

Proceed and land under basic VFR conditions.

Ascent Spring Training (12 decks)

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