Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Own Extra > Met Random Stuff I Can’t Remember > Flashcards

Met Random Stuff I Can’t Remember Flashcards

1
Q

Temperature Error Correction (TEC) =

A

TEC = 4 x ISA Dev. x (Layer or air/1000)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Relative Humidity =

A

Relative humidity = 100 - (( Temp. - Dew point) x 5)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Density Altitude =

A

DA = PA + 120 x ISA Dev.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Temperature at tropopause poles and equator is?

A

Poles: -45
Equator: -75

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Pressure lapse rate is?

A 
100hpa - 53,000ft
200hpa - 38,000ft
300hpa - 30,000ft
500hpa - 18,000ft
700hpa - 10,000ft
1013hpa - sea level
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Density lapse rate is?

A
  1. 302 - 40,000ft
  2. 609 - 22,000ft
  3. 903 - 10,000ft
  4. 225 - sea level

Density in kg/m^3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Pressure systems in January are?

A 
Icelandic low
North Australian low 
Canadian high
Azores high
Siberian high
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Pressure systems in July are?

A

North American low
Asian low
Pacific high
Azores high

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Polar air mixing ratio is?

A

< 1g/kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Tropical air mixing ratio is?

A

28 g/kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Cloud droplet size is around?

A

0.02 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Cloud levels are?

A

High: 16,500ft - 45,000ft
Medium: 6,500ft - 23,000ft
Low: Surface - 6,500ft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Drizzle size is?

A

Less than 0.5 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Rain size is?

A

More than 0.5mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Snow grain size is?

A

Less than 1 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Snow pellet size is?

A

2 - 2.5 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Small hail size is?

A

Less than 5 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Hail size is?

A

Greater than 5 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Continuous precip is?

A

60 mins or more from As or Ns

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Intermittent precip is?

A

Continuous with breaks As or Sc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Showers are?

A

Short outbreaks Cu or Cb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Waterdroplet auze is?

A

0.02 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Microbust diameter is?

A

4 km

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

How long does a microburst last?

A

1 - 5 min

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Where and when do tornadoes occur?

A

Mid-west USA in spring/summer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Tornado windspeeds are?

A

100 - 200 kts in funnel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Tornado ground soeed is?

A

20 - 40 kts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Average tornado diameter is?

A

100 - 150 m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Tornadoes last up to?

A

30 mins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Thunderstorms require?

A

Moisture, instability and lifting force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Gust fronts occur when?

A

Mature stage and roll clouds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Fog vis

A

Less than 1000m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Mist vis

A

More than 1000m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Haze vis is up to?

A

5000m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Expexted vis of high level cloud is?

A

1000m +

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Expexted vis of mid level cloud is?

A

20 - 1000m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Expexted vis of low level cloud is?

A

10 - 30m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Vis in METAR is in m up to?

A

In m up to 5000m then in km

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Dust storm has what vis?

A

Less than 200m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

How is vis reported? (What steps)

A

50m steps to up 800m
100m steps between 800 - 5000m
1km steps between 5000m - 10km

41
Q

Harmattan reduces vertical vis?

42
Q

Harmattan reduces horizontal vis?

43
Q

RVR when vis is?

A

Less than 1500m

44
Q

What device measures vis?

A

Transmissometer

45
Q

RVR reading updated every?

46
Q

RVR reading averages over how many mins for METAR and SPECI?

A

Averaged over 10 mins

47
Q

RVR reported in what steps?

A

25m steps to 400m
50m steps between 400 - 800m
100m steps above 800m

48
Q

Vertical vis reported to what alt?

49
Q

Vertical bis reported in what steps and units?

A

30m to 600m
Or
100ft to 2000ft

50
Q

Calm wind is?

A

Less than 1kt

51
Q

Gust is?

A

Increase in 10kt for less than 1 min

52
Q

Squall is?

A

Gusts lasting more than 1 min

53
Q

Gale force is?

54
Q

Storm force is?

55
Q

Hurricane force is?

56
Q

Coriolis increases with?

A

Lattitude and windspeed

57
Q

METAR wind is?

A

Degrres true and averaged over 10 mins

58
Q

ATC wind is?

A

Magnetic and averaged over 2 mins

59
Q

In the northern hemisphere coriolis deflectsvthe wind?

60
Q

Geostrophic wind afftected by?

A

Windspeed

Increases with lattitude

61
Q

Friction layer deprh is affected by?

A

Terrain, windspred and stability

62
Q

Going into the friction layer, in the N hemisphere the wind does what over land and sea?

A

Land:
Speed reduces by 50% and backs by 30 degrees

Sea:
Speed reduces by 25% and backs by 15 degrees

63
Q

Foehn wind in Rocky mountains is called?

64
Q

Anabatic winds blow upslope during the?

65
Q

Anabatic winds blow downslope during the?

66
Q

Easterly jet

A

East to west
FL500
10 - 20 degrees
Only in Summer in N Hem

67
Q

Sub-tropical jet

A

FL400

30 - 40 degrees

68
Q

Polar front jet

A

FL300

50 - 60 degrees

69
Q

Arctic jet

A

Only in winter
FL200
50 - 70 degrees

70
Q

Jet stream dimensions?

A

2 miles deep
200 miles wide
2000 miles long

71
Q

Min jet stream speed is?

72
Q

Min jet stream speed on SIGWX chart is?

73
Q

Change bars // indicate?

A

Change of 20kts or 3000ft

74
Q

How far can turbulence extend after mountain waves?

A

50 - 100 nm downwind

All the way up to the lower Stratosphere

75
Q

Mountain waves require wind speeds of?

A

15 - 20 kts

76
Q

Rockies turbulence can extend

A

300 nm downwind

77
Q

Low level wind shear system updates every?

78
Q

Polar Maritime

A 
Cold, moist
Instable
Cb
Rain showers
Good vis
79
Q

Arctic maritime

A

Very cold
Unstable
Cu, Cb
Rain or snow showers

80
Q

Polar continental

A

From Russia

Stable
Clear skies
Low temps
Frost
Possible snow showers if moisture picked up over the sea
81
Q

Tropical continental

A 
Stable
Clear skies
High temps
Haze
Can get TS in Summer
82
Q

Tropical maritime

A 
Stable 
Low stratus 
Advection fog
Dz
Poor vis
83
Q

Returning polar maritime

A 
Stable
Low stratus
Dz
Occasionally Cu, Cb in Summer
Morning BR
84
Q

Weather extenda how far ahead of a warm front?

A

500 - 700nm

85
Q

Steepness of a warm front?

86
Q

Steepness of cold front?

87
Q

Warm front travels at?

A

2/3 of speed of cold front

88
Q

With a warm occlusion where is the coldeat air?

A

Ahead of the front

89
Q

TRS need?

A 
Unstable air
Sea temp. min 26.5 degrees
Deep oceans 200-300 ft
Trigger
Coriolis 5 - 25N
90
Q

Tropical depression windspeeds are?

A

20 - 33kts

91
Q

Tripucal storm windspeeds are?

A

34 - 63kts

92
Q

Cyclone windspeeds are?

A

More than 64kts

93
Q

TRS groundspeed is?

A

15 - 20kts

94
Q

TRS eye diameter is?

95
Q

Average diameter of a TRS is?

96
Q

How long does a tempo last

A

Up to 1 hour

97
Q

Bergeron is?

A

Ice crystal precip formation process

98
Q

Coalescance is?

A

Water droplet formation process

99
Q

Diameter of TRS mature stage

Own Extra (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions