IFR » IR Operational Knowledge » Meteorology

53.104 Weather Maps

53.104.2 Describe the weather sequence and general flying conditions associated with:

(a) cold fronts;

(b) warm fronts;

(c) occluded fronts; and

(d) stationary fronts.

53.104.4 Describe typical wind speeds and directions ahead of and behind these fronts in midlatitudes.

53.104.6 Explain how subsidence and ascent of air influences the type of weather commonly associated with pressure systems.

53.104.8 Identify the general direction of movement of pressure systems in the mid-latitudes of the Southern Hemisphere.

53.104.10 Define the “westerly index” over New Zealand.

53.104.12 Identify ‘high’ and ‘low’ westerly indices on weather maps.

53.104.14 Explain the weather distribution across New Zealand in high and low westerly index situations.

53.104.16 Describe the significance of high and low westerly index situations across New Zealand to aviation.

53.106 Fundamentals of the Atmosphere

53.106.2 Define ‘pressure gradient’.

53.106.4 Identify strong and weak pressure gradients on a weather map.

53.106.6 Given examples of ambient temperature at a stated altitude, calculate:

(a) the ISA temperature at that altitude; and

(b) the ISA height at that temperature.