system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the sky yellow during severe weather, like a tornado?
gpt
It's a combination of the fact that most severe thunderstorms happen later in the day, when the sun is beginning to set, and involve very thick clouds. The combination of how the sun's rays are entering the atmosphere at a specific angle, and how thick and dark clouds absorb and reflect certain rays over others, shifts the color of the sky from blue to green-yellow.