* Green: This is a classic storm sky color, often caused by sunlight scattering through water droplets in the air.
* Gray: A more common color, as storm clouds tend to be dark and filled with moisture.
* Yellow: This can happen when sunlight is scattered through dust or other particles in the air.
* Purple: Sometimes the sky can take on a purplish hue, particularly near the horizon, due to the combination of blue and red light scattering.
* Dark Blue: A deep blue sky can also indicate an approaching storm.
It's important to remember that the color of the sky before a storm depends on many factors, including the type of storm, the time of day, and the atmospheric conditions.
