This output data shows current intensities of precipitation based on real or predicted data sets. This output is using not only radars but also numerical models and satelite images to improve coverage over the oceans and some land areas. Intensities of precipitation are described by colours in range from blue for a weak precipitation rate, to red for a very strong precipitation rate. Strong colours (red) need to be interpreted carefully since they may indicate not only heavy rain or snow but also thunderstorms, hail, strong winds, or tornadoes.