At Hilton College, South Africa, a depression gave cloudy, humid conditions. The clouds over southern Africa can clearly be seen on today's satellite images . These Meteosat images show what the clouds would have looked like to someone in the satellite. They are called 'Visible images', as distinct from 'Infra-red images', which show temperatures. On a visible image, you see clouds as though you were looking with your own eyes but in black and white.
Clouds appear white.
Snow appears white. Deserts are light-coloured. The sea appears dark, except where the sun is reflected from it. On an infra-red image, white indicates cold, black indicates warm. Today was considerably cooler at our schools in south-east Australia than it was on some days last week.