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ATC NATTC > Weather > Flashcards

Weather Flashcards

1
Q

Sea level temperature and pressure

A

Surface temp 15°C 59°F

Pressure to 29.92 inches Hg or 1013.2 mbar

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2
Q

Weight of atmosphere at sea level

A

14.7 pounds per square inch

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3
Q

Pressure decreases roughly 1 inch of mercury per __________ foot increase in altitude

A

1000

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4
Q

Types of barometers

A

Mercurial and Aneroid

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5
Q

Altimeter setting indicator (ASI)

A

Primary means of obtaining altimeter Setting at terminal facility

Reports station pressure

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6
Q

Altimeter setting

A

Station pressure with the correction factor for field elevation

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7
Q

Altimeter

A

Barometer which is graduated to read height rather than pressure

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8
Q

Altitude

A

Height in feet above ground level or from mean sea level

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9
Q

True altitude

A

Actual altitude above mean sea level

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10
Q

Indicated altitude

A

An altitude above mean sea level indicated on altimeter

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11
Q

Altimeter setting

A

Value to which scale of the pressure altimeter sit so the altimeter indicates true altitude at field elevation

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12
Q

Pressure high to low

A

Look out below

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13
Q

Pressure low to high

A

Eyes to the sky

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14
Q

Lapse rate

A

2°C or 3.3°F per thousand feet

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15
Q

Pressure altitude

A

Altitude in the standard atmosphere where the current pressure surrounding the aircraft is found

FL180

29.92

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16
Q

Density altitude

A

The altitude in the standard atmosphere for density of the air surrounding the aircraft is found

Pressure temperature and humidity determine air density

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17
Q

High density altitude

A

Center air reduces aircraft performance by reducing power thrust and lift. Lengthen takeoff and landing rolls

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18
Q

Convection current

A

2 services he did unequally cause the uneven heating of the air above

Warm air rises as cool air sinks creating wind

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19
Q

advection

A

Horizontal movement of wind, can transfer heat or atmospheric properties from one area to another

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20
Q

Coriolis effect

A

Action called by the rotation of the earth that affects the path of air currents. Deflecting air to the right in the northern hemisphere

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21
Q

Circulation

A

Airflow from areas of high pressure to areas of low pressure

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22
Q

Jet stream

A

Narrow band of strong winds moving through the upper atmosphere. Associated with frontal movements separating warm and cold there.

Creates high level wind shear/clear air turbulence (C a T)

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23
Q

Atmospheric pressure

A

A measure of weight that a column of air exerts on an object

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24
Q

Sea level temperature and pressure

A

Surface temp 15°C 59°F

Pressure to 29.92 inches Hg or 1013.2 mbar

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25
Q

Weight of atmosphere at sea level

A

14.7 pounds per square inch

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26
Q

Pressure decreases roughly 1 inch of mercury per __________ foot increase in altitude

A

1000

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27
Q

Types of barometers

A

Mercurial and Aneroid

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28
Q

Altimeter setting indicator (ASI)

A

Primary means of obtaining altimeter Setting at terminal facility

Reports station pressure

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29
Q

Altimeter setting

A

Station pressure with the correction factor for field elevation

30
Q

Altimeter

A

Barometer which is graduated to read height rather than pressure

31
Q

Altitude

A

Height in feet above ground level or from mean sea level

32
Q

True altitude

A

Actual altitude above mean sea level

33
Q

Indicated altitude

A

An altitude above mean sea level indicated on altimeter

34
Q

Altimeter setting

A

Value to which scale of the pressure altimeter sit so the altimeter indicates true altitude at field elevation

35
Q

Pressure high to low

A

Look out below

36
Q

Pressure low to high

A

Eyes to the sky

37
Q

Lapse rate

A

2°C or 3.3°F per thousand feet

38
Q

Pressure altitude

A

Altitude in the standard atmosphere where the current pressure surrounding the aircraft is found

FL180

29.92

39
Q

Density altitude

A

The altitude in the standard atmosphere for density of the air surrounding the aircraft is found

Pressure temperature and humidity determine air density

40
Q

High density altitude

A

Center air reduces aircraft performance by reducing power thrust and lift. Lengthen takeoff and landing rolls

41
Q

Convection current

A

2 services he did unequally cause the uneven heating of the air above

Warm air rises as cool air sinks creating wind

42
Q

advection

A

Horizontal movement of wind, can transfer heat or atmospheric properties from one area to another

43
Q

Coriolis effect

A

Action called by the rotation of the earth that affects the path of air currents. Deflecting air to the right in the northern hemisphere

44
Q

Circulation

A

Airflow from areas of high pressure to areas of low pressure

45
Q

Jet stream

A

Narrow band of strong winds moving through the upper atmosphere. Associated with frontal movements separating warm and cold there.

Creates high level wind shear/clear air turbulence (C a T)

46
Q

Atmospheric pressure

A

A measure of weight that a column of air exerts on an object

47
Q

cumulus

A

ustable cloud caused by convection currents

towering, cumulonibus (rain), cumulus fractus

48
Q

stratus

A

low lying clouds formed when conditions are favorable for fog, wind 5kt or less

49
Q

cirrus

A

high altitude feathery

50
Q

nimbo/nimbus

A

suffix for rain

51
Q

fractus

A

suffix for broken

52
Q

TS

A

cumulus clouds in updrafts, mature stage begins precip, dissipating stage is caused by rain dragging air to the ground and high winds causing anviling

53
Q

TS Hazzards

A

tornados(+FC), squall lines, wind shear, icing, hail, low vis, affects altimeter, lightning, microburst

54
Q

Microburst

A

sudden down draft up to 2.5 mile outflow

55
Q

unstable air

A

cumuliform clouds, showers, turbulence, good vis

56
Q

stable air

A

stratiform clouds and fog, continuous precip, fair to poor vis

57
Q

north american airflow

A

west to east

58
Q

cold front

A

wind shifts clockwise blowing northwest

15 knots with thunderstorms

59
Q

fast moving cold front

A

25 to 30 knots with squall lines possible tornadoes

60
Q

warm front

A

10 knots, wind shift clockwise to blow southwest, steady precip on leading edge, fog

61
Q

occluded front

A

cold front overtaking warm front, severe weather 150 miles from the occlusion point (triple point)

62
Q

stationary front

A

little or no movement, may greatly hamper flight ops by staying in area for days, weather dependent on humidity and stability of air

63
Q

air to ground vis

A

slant range

64
Q

radiation fog

A

most common to ATC, caused by cooling of earths surface

65
Q

advection fog

A

most air moving over cold ground or water

66
Q

upslope fog

A

air force cooled on slopes

67
Q

steam fog

A

dew point is raised to temp of air, cold air over warm water

68
Q

frontal fog

A

warm rain failing through cold air raises the dew point

69
Q

FU and HZ

A

smoke and haze, most dangerous during temp inversion (occluded front)

70
Q

blowing snow dust and sand

A

reduce vis to near zero over extensive areas

71
Q

Icing intensities

A

trace, light, moderate, severe

72
Q

turbulence types

A

convective-caused by uneven heating of earths surface

mechanical-

ATC NATTC (1 decks)

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