AWR MET

AWR sends out a pulse of a particular wavelength that is designed to detect large water droplets - the kind associated with cumuliform clouds that are the most likely to cause trouble for the flight. It therefore detects zones of precipitation and especially CBCB —Cumulonimbuss, where there are large areas of large droplets. On a coloured radar screen, green, yellow and red will represent increasing intensity of returns from the radar.