.
2ºC / 1000 ft
1.5ºC / 1000 ft
3ºC / 1000 ft
1.98ºC / 1000 ft
QNE
QNH
QFE
Standard Pressure
Warmer than the southern hemisphere and winters are warmere too
Colder then the southern hemisphere due to the smaller amount of solar radiation
Colder than the southern hemisphere because of the large land masses
Warmer than the southern hemisphere and the winters are colder
Surface divergence and upper level convergence causing wind spread descent of air in the depression
Surface convergence and upper level divergence causing wind spread descent of air in the depression
Surface convergence and upper level divergence causing wind spread ascent of air in the depression
Surface divergence and upper level convergence causing wind spread ascent of air in the depression
Always more active
Sometimes more active
Never more active
Unlikely to produce gale force winds
The rotation of the earth is west to east
The thermal winds are westerly on average
Surface winds are nearly always westerly
Jet streams are usually westelry
In the warm air some 400 NM ahead of a warm or cold front and near the subtropical highs
In the warm air some 400 NM ahead of a warm front and some 200 NM behind a cold front and near the subtropical highs
Only in association with the polar front
In association with the polar front and with mountain wave
Easterly
Westerly
At speeds greater than 60 knots
Calm
The boundary surface between polar continental and tropical continentl air
Near the poles
Only apparent over the Atlantic ocean
The region where warm sector depressions develop
With 1013 set the altitude above MSL
With airfield QNH set the height above the airfield datum
The vertical distance above the pressure level set
The correct flight level with regional QFE set
260 Degrees 15KT
260 Degrees 15KT; temporary 220 Degrees 18G30KT
220 Degrees 15KT; temporary 220 Degrees 18G30KT
270 Degrees 12KT
300 Degrees 15KT; temporary 300 Degrees 20G30KT
300 Degrees 15KT
240 Degrees I0KT; temporary 260 Degrees 15G30KT
240 Degrees 10KT
260 Degrees 15G30KT
230 Degrees 20G40KT
210 Degrees 15G30KT PROB40 temporary 230 Degrees 20G40KT
210 Degrees 15G30KT
3000
8000; temporary 3000
8000
1200
PROB 30 0300
1200; PROB 30 temporary 0300
2000
3000
8000
3000
8000
6000
BKN 015
BKN 010 SCT 015 CB
BKN 015; PROB 30% temporary BKN 010 SCT 015 CB
BKN 008; PROB 30% BKN 002; temporary BKN 004
BKN 004
BKN 008; temporary BKN 004
SCT 025 SCT 100 BKN 250; temporary SCT 018 TCU BKN 030
SCT 025 SCT 100 BKN 250
SCT 018 TCU BKN 030
BKN 008; temporary BKN 004
BKN 002
BKN 008
SCT 020 BKN 040 temporary BKN 010; BKN 020 CB BKN 050
SCT 030; BKN 100
FEW 008; SCT 020; OVC 090
BKN 003
SCT 020; BKN 100
SCT 003 BKN 009
SCT 025 SCT 100 BKN 250; temporary SCT 018 TCU BKN 030
SCT 012 BKN 020 OVC 090
SCT 040 BKN 100 BKN 230
Wind 240 Degrees 18KT; visibility 10KM or more; NSW; clouds 3-4 OKTAS 1500 FT and 5-7 OKTAS 2500 FT; probably 30% temporary wind 250 Degrees 20KT; gusts 32KT; visibility 5000M shower rain; clouds 1-2 / OKTAS 1000ft and 3-4 OKTAS cumulonimbus 1500 FT
Wind 240 Degrees 18KT; visibility up to 10KM ; rain and light shower rain; clouds 3- 4 OKTAS 1500FT; at 5-7 OKTAS 2500 FT
Wind 250 Degrees 20KT gusts 32KT; visibility 5000M; shower rain; clouds 1-2 OKTAS I000FT and 3-4 OKATS cumulonimbus 1500 FT
100M; on runway 09 and 27 RVR is 250M with tendency to no distinct change; freezing fog
100M; on runways 09 and 27 visibility is 250M with tendency to get worse; freezing FOG; within the fog visibility zero
100M; on runways 09 and 27 visibility is 250M with downward tendency; freezing fog; within the fog visibility zero
400M; on runway 36 visibility is 500M with tendency to get worse; freezing fog
400M; on runway 36 RVR is 500M with tendency to downward; freezing fog
400M; on runway 36 visibility is 500M with upward tendency freezing fog
200M; on runway 07 RVR is 225M and visibility is 400M; freezing fog; within the fog visibility zero
200M; on runway 07 RVR has an upward tendency from 225M to 400M; freezing fog; within the fog isibility zero
200M; on runway 07 variable RVR 225-400M; freezing fog
1500M; on runway 23 variable RVR 700-1500M with tendency to no distinct change; fog in the vicinity; temporary visibility 600
1500M; on runway 23 RVR is 700M and visibility is 1500 north of the runway; vertical convection fog
1500M; on runway 23 RVR has an upward tendency from 700M to 1500M; fog in the vicinity
2500M; on runway 15 RVR is 900M and visibility is more than 1500M; shallow fog
2500M; on runway 15 variable RVR from 900M to more than 1500M; shallow fog
2500M; on runway 15 RVR has an upward tendency from 900M to more than 1500M mist and fog
The actual temperature is -2 DegreesC and the dew point temperature is -5 DegreesC
The actual temperature is -5 DegreesC and the dew point temperature is -2 DegreesC
The actual temperature is -2 DegreesC and the difference between the actual temperature and the dew point is -5 DegreesC
The actual temperature is -3 DegreesC and the difference between the actual temperature and the dew point is -4 DegreesC
The actual temperature is -3 DegreesC and the dew point temperature is -4 DegreesC
The actual temperature is -4 DegreesC and the dew point temperature is -3 DegreesC
The actual temperature is -02 DegreesC and the difference between the actual temperature and the dew point is -2 DegreesC
The actual temperature and the dew point are -2 DegreesC
The minimum air temperature is +2 DegreesC and the minimum of dew point temperature is -2 DegreesC
- 7 DegreesC
+7 DegreesC
14 DegreesC
0 DegreesC
12 DegreesC
-12 DegreesC
+12 DegreesC
0 DegreesC
The snow ended
Continuous snow
Snow transformed to the rain
Low layers of clouds are not expected during the next hour
The forecast indicates the end of the significant weather
No significant wind changes are expected during the next two hours
There is icing at stop location at FL 350
The tropopause level
There is turbulence at spot location at FL 350
None of the above
The tropopause low
There is an icing at spot location at flight levels lower than FL 230
There is turbulence at spot location at flight levels lower than FL 230
None of the above
There is an icing at spot location at flight levels higher than FL 310
There is turbulence at spot location at flight levels higher than FL 310
Tropopause high
None of the above
Moderate clear air turbulence from FL 240 to FL 350
Moderate turbulence in the clouds from FL 240 to FL 350
Moderate turbulence at FL 240 and FL 350
None of the above
Moderate clear air turbulence from FL 220 to FL 360
Severe clear air turbulence from FL 220 to FL 360
Severe turbulence in the clouds from FL 220 and FL 360
Moderate turbulence in the clouds from FL 220 and FL 360
Tropopause
Stratosphere
Troposphere
Stratopause
Barometer
Hygrometer
Anemograph
Barograph
Decreases at an increasing rate as height increases
Decreases at a constant rate as height increases
Decreases at a decreasing rate as height increases
Decreases at a constant rate up to the tropopause and then remains constant
Because air density increases with decrease of temperature; air density must increase with increase of height in the International Standard Atmosphere [ISA]
At any given surface temperature the air density will be greater in anticyclonic conditions than it will be when the MSL pressure is lower
Air density increases with increase of relative humidity
The effect of change of temperature on the air density is much greater than the effect of change of atmospheric pressure
Convergence causing increased cloud and precipitation
Divergence causing increased cloud and precipitation
Subsidence causing increased cloud and precipitation
Subsidence causing decreased cloud and precipitation
Convergence causing increased cloud and precipitation
Divergence causing increased cloud and precipitation
Divergence causing cloud to break up and more precipitation
Divergence and subsidence causing clear skies and good weather
An inversion
An inversion aloft
Uniform lapse rate
An isothermal layer
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