What does the weather forecast mean by black?

There is no "black weather forecast" warning, only black meteorological disaster warning.

The new version of meteorological disaster warning signal is generally divided into four levels (IV, III, II and I), which respectively represent general, heavy, serious and particularly serious. At the same time, it is marked in Chinese and English, which is consistent with all national emergency disposal grades and colors. The black warning signal of typhoon, rainstorm and cold wave has become history, and red is the highest level, which is the warning signal of sudden meteorological disasters.