system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why does it get greenish outside when a tornado is coming?

I've lived in Kansas for most of my life and it was just accepted that if outside had a green/ yellow tint that was a sign of a tornado. What causes this, and is it actually indicative of a tornado?
gpt
"Researchers remain undecided about the exact mechanisms that cause the sky to appear green in certain thunderstorms, but most point to the liquid water content in the air. The moisture particles are so small that they can bend the light and alter its appearance to the observer. These water droplets absorb red light, making the scattered light appear blue. If this blue scattered light is set against an environment heavy in red light—during sunset for instance—and a dark gray thunderstorm cloud, the net effect can make the sky appear faintly green. In fact, green thunderstorms are most commonly reported in the late afternoon and evening"