Previous Exam Questions Flashcards
Max height of a CB in km and ft
12km
40,0000
But can stretch up to
Worst area for CAT in the vicinity of the polar jet stream is normally located
On the depression side
Typical visibility in heavy rain
Around 100m (poss 50)
Location of the roaring 40s
40-50s
Hurricane average in the Atlantic
12 (around 10)
Temp of the tropopause at 20km
-100
What will clear orographic fog
Change in the airflow
How tropical cyclones form east of Darwin each year
2
Who prepares a SIGMET
A meteorological watch office
How is water vapour content distributed
0g/m3 near the poles
25g/m3
How often is windshear reported
Every min
Satellites with the highest resolution
Polar orbiting
Describe a routine air report and a special air report
AIREP is a routine report
PIREP is a special air report
Satellite closest to earth
Polar orbiting
Weather reported in a special air report
Ts, without hail that are obscured, embedded and widespread
(Not isolated CBs) heavy dust and sandstorms, volcanic ash cloud
Visibility range for a heavy sandstorm
200m
Characteristics of a cold air pool
Cold air at altitude and in abnormal locations
Weather to expect from a cold air pool
Snow showers
Can the katabatic effect cause a valley inversion
Yes
What to do when flying through cirrus clouds to min the effect of ice crystal icing
Monitor for power fluctuations
Cloud above the tropopause
Noctiluscent cloud in mesosphere
CBs
Overshooting tops
Movement associated with a stationary front
Direction of straight isobars, <5kts
Climate between 30 to 50 degrees
Temperate
Conditions required for a mountain wave
Speed in excess of 20kts at mountain top, wind direction perpendicular to the range, stable conditions at the peak
Number of TRS in E Australia
9
Slope of a cold front
1:80
Mixing ratio in tropical and polar air masses
Tropical 25g/kg
Polar 0g/kg
Temp of a saturated parcel of air cools what happens to RH
Stays at 100%
Chart for identifying the subtropical jet stream
200hpa/39,000ft
How many volts are created by a lighting strike
200-500kv
2,000 ts active around the globe at one time creating 100 lighting strikes per second
They will create a 500kv charge travelling through the ionosphere
For a 3 hour flight what is most useful pieces of met info
TAF valid at eta, SIGWX valid for eta, SIGMET valid for eta, current METAR inc trend, NOTAM
Max height of steam fog
Around 500ft
Speed of movement of a warm front
10kts
Tc air mass originates
South of France
Most likely to dissipate orographic fog
Down-sloping wind
Where do lightening strikes occur most frequently
Between CB and the ground
When to expect lee lows
Wind blowing north to south of an east to west ridge line
Best way to measure and identify CB cloud
IR and visual
In what conditions is the lowest useable FL safely at or above TA
Qnh greater than 1013 and temp greater than isa
Expected duration of amid latitude depression
Less than 4 days
Visibility in warm air mass
5-10km
What does white IR indicate
Cold temps so high cloud and visual indicates density
In mixed cloud ice particles are formed at the expense of
SCWD
Greatest potential difference found in a TS
Between the surface of the earth and the tops of the ts clouds as well and between different parts of the same cloud
What causes a global variation in the distribution of electrical charges in the ionosphere at the 500KV
Distribution of TS
Cold air pool is characterised by
Topographic depression filled with cold air
Height of steam fog
Less than 500ft
A secondary depression is frequently observed where?
On a cold front
Ground radar will detect
Rain and its intensity
Where is precipitation observed on a quasi stationary front
It is widespread in the cold air and there is slight precipitation along the front
What Harvard is evident with virga
Cold air downdrafts due to evaporation
What has the strongest effect on climatology
Differential ocean heating an currents above ENSO
Diameter of a TRS
500km
What satellite imagery is used for the tops of cumulus clouds
Infrared
Role of the MWO
Prepare warnings of hazardous weather conditions and issue warnings for windshear in the climbout and approach paths
9999
10km or greater
How is lightning formed
Electrical potential belong generated between the earths surface and the clouds
What is the distance and vertical extent of MTW
300nm and up to the tropopause
How long does a PFD take to build and its average duration
1-2 days and lasts for 3-4
Direction of sunrise
East and sets in the west
AIRMET
Low level warnings
Tropical rain climate
10* N and S
Savannah
10 to 25*, 1 wet season
Arid subtropical
20 to 35*, warm and dry
Warm temperate
Between 35 and 40* warm dry summers, cool dry winters due to PFD
Cool temperate
40 to 65* wet and windy, mostly effected by PFD
Boreal zone
40 and 60, in-between cold temperate and polar, biggest temperature variations
Polar
65 and 90, mostly frozen tundra with a mean temp below +10 throughout the year
