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Flashcards in Meteorology Deck (29)
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1

In a SIGMET, how would thunderstorms or cumulonimbus cloud hidden in other clouds be reported?

EMBD TS

2

In a TAF, what does SCT025 mean?

Scattered cloud with a cloud base of 2500 ft above aerodrome level

3

In a METAR, cloud base is given relative to:

aerodrome level

4

The tropopause describes the:

the boundary between the troposphere and the stratosphere

5

The TAF for your aerodrome on the Scilly Isles reads: TAF EGHE 260818Z 2609/2618 19007KT 9999 FEW025 PROB30 TEMPO 2616/2618 6000 SHRA BKN014CB Describe the forecast conditions for the time period 1600-1800 that day.

30% probability that there will be showers, rain and cumulonimbus cloud for temporary periods

6

When water changes from a higher energy state (vapour) to a lower energy state (liquid) it will:

give off heat energy

7

What name is given to the situation where temperature rises as altitude is gained?

An inversion

8

Heavy rain and lightning typically signify which stage of the thunderstorm life cycle?

Mature stage

9

During a climb, your static vent ices over completely. What effect will this have on your altimeter?

it will give the appearance of level flight at that altitude

10

What type of ice is usually formed when small supercooled water droplets freeze on a cold surface, producing a rough opaque deposit?

Rime ice

11

VC is an abbreviation used in METARS to signify:

vicinity

12

The METAR for Sleap is as follows: EGCV 122020Z 28003KT 8000 SKC 17/16 Q1028 Which of the following statements is most likely to be true?

High pressure is causing hazy conditions

13

ou want to obtain a special forecast for a flight of 650 nautical miles. How much notice are you required to give?

At least 4 hours

14

What is 71 degrees Celsius, expressed using the Fahrenheit scale?

160 degrees Fahrenheit

15

What does the following meteorological symbol (drawn from a Significant Weather chart) indicate?

-v-v-

A line squall

16

In a TAF, what does SCT025 mean?

Scattered cloud with a cloud base of 2500 ft above aerodrome level

17

The surface temperature is 25 degrees Celsius, and the dew point is 22 degrees Celsius. Approximately what height would you expect the cloud base to be, given that the average environmental lapse rate up to 10,000ft agl is 2 degrees Celsius per 1000ft?

1000 ft

18

Tropical maritime air masses are commonly:

stable, warm and moist

19

The subsidence (sinking) of air flowing from a high pressure system leads to:

divergence at the ground level

20

The saturated adiabatic lapse rate is approximately:

one half of the dry adiabatic lapse rate

21

Unsaturated air will cool adiabatically at about 3 degrees Celsius for every 1000 ft. What name is given to this?

Dry Adiabatic Lapse Rate (DALR)

22

In the northern hemisphere, when compared to the gradient wind strength, over land the surface wind may be:

one third of the strength, and backed approximately 30 degrees

23

What is sublimation?

When a solid goes directly to a gaseous state

24

What is 8 degrees Celsius, expressed using the Fahrenheit scale?

46 degrees Fahrenheit

25

How long are civilian TAF's usually valid for?

9, 24 or 30 hours

26

On a warm day, there may be a weak flow of warmed air up a mountain slope. What name is given to this wind?

An anabatic wind

27

As the warm front approaches at the surface, the air pressure will:

steadily fall

28

As a result of solar heating, the earth's temperature reaches its maximum:

in the mid afternoon

29

On a weather chart, what abbreviation is used to describe conditions likely to be encountered 'At Sea'?

SEA