Surface Chart Flashcards
1
Q
Col
Where
Weather associated in summer
Weather associated in winter
A
Between 2 lows and 2 high pressure system
Summer- TS heat
Winter- fog, poor visibility
2
Q
Isobars
What are they
A
Same pressure level at sea level
Qff =mean sea level
3
Q
Altitude of pressure value 100hpa 200hpa 300hpa 500hpa 700hpa 850hpa
A
53000ft 39000ft 30000ft 18000ft 10000ft 5500ft
4
Q
Pressure lapse rate calculation
A
H: 96 x T (kelvin) / Pressure
5
Q
QFE
A
Atmospheric pressure at elevation (measured)
6
Q
QNH
A
Atmospheric pressure at sea level ( calculated using lapse rate)
7
Q
Qff
A
Altitude at mean sea level but using actual conditions
