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Flashcards in Bgs Facts Deck (30)
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1
Q

Polar ice caps creates what type of air mass

A

Arctic

2
Q

What is different in the core of the TRS than the surroundings

A

Core is warmer than the surrounding air

3
Q

Eye of a hurricane

A

Lower than 63kts

Descending air, thus no clouds

4
Q

Where are cyclones formed

A

Bay of Bengal

5
Q

Wast side of an easterly wave are thunderstorms most likely to form

A

Easterly side

6
Q

Above and below an inversion, what is likely to happen to the wind

A

Change significantly in speed and direction

7
Q

Height of strongest mechanical turbulence

A

250ft

8
Q

When do tornadoes form

A

In N America, spring/summer

9
Q

What is a gust front

A

Cold air outflow from a ts

10
Q

When is rvr reported

A

When visibility decreases below 1500m

11
Q

Triangle symbol on wx charts

A

Hail

12
Q

What met messages are produced in ATIS

A

Met report and specials

13
Q

What happens to the speed of a polar front in winter

A

Increases

14
Q

When is a polar front jet speed the fastest

A

Between a ridge and a trough

15
Q

Can airframe icing form in clear air

A

Yes

16
Q

Pressure altitude

A

1013.25

17
Q

Saturation mixing ratio

A

Number of grams of water it contains per KG of air.

Increases exponentially with temp

18
Q

% of air in the lower troposphere that consists of WV

A

0-5%

19
Q

Mostly likely reasons for stratus to be dispersed

A

Insolation, resulting in the lifting of the condensation level

20
Q

Capillatus

A

Hairy top like an anvil

21
Q

Fractus

A

Broken in pieces

22
Q

Humilis

A

Small vertical extent

23
Q

Towering cumulus

A

Great vertical extent

Cauliflower

24
Q

BCFG

A

Patchy fog

25
Q

Amount of hurricanes in N America per year

A

6

26
Q

Tropical downpour can reduce vis to

A

Tens of meters

27
Q

What can low level windshear be associated with

A

Passage of a cold front

28
Q

Duration of a microburst

A

1-5mins

29
Q

Weather to be included in a special air report

A
Severe mountain wave 
Sever dust/sand storms 
Mod and severe icing 
EMBD,TS,
Volcanic ash clouds
30
Q

600hpa FL

A

FL140