ATPL Met Revision 16

for a period of 3hr from the time of the observation

cloud base is height above aerodrome, wind direction based on true north

heavy continuous rain from overcast NS

land surface dry and dusty, wind at least moderate and an unstable atmosphere

clear sky, high temperature, high relative humidity

mountain waves

down draughts

it will cool at about 1.5 degrees per 1000ft

conditional instability or conditional stability

near latitude 30 degrees south

many, with little or no separation

they tend to form over warm seas beyond 5 degrees of the equator

in the south eastern quadrant

the probability of encountering CAT is greatest if the jet is curved

below the jet core

southern side of the jet just below the level of the jet core

thunderstorms are possible in the stream because the stream will bring cold moist air rapidly over a warmer sea surface creating instability through latitudinal heating

the runway to be visible from overhead, but not in the circuit area or final

above the freezing level on climb in cumuliform cloud

thermal convection