Stunning Orange Sky!

Stunning Orange Sky!
I captured these incredible images last night during a snowstorm in Flagstaff, AZ.

Cause:

1. Seasonal Changes.
The orange sky during a heavy snowstorm in the middle of the night is likely due to the scattering of sunlight through the snow particles in the atmosphere. As the snow falls, it can scatter the blue and violet wavelengths of light, allowing the longer wavelengths of red and orange to dominate the sky. This phenomenon is common during winter storms, where the snowfall can create a thick layer of particles in the atmosphere, enhancing the scattering effect and resulting in a vibrant orange sky.

2. A Dark Sky City.
Dark sky cities tend to use orange streetlamps (sodium vapor lights.) A good portion of this light is reflected up into the sky off of the snow-covered ground.
It's a really cool and unique lighting effect which happens in snowy cities with an abundance of red-shifted light.

3. Snowstorm.
Because the clouds are so physically close to the ground when they're heavy with half-frozen water (which turns into snow at low temperatures), they bounce this light back up to our eyes.

These factors combined can create a striking orange sky during a snowstorm at night, especially in high elevation locations with dark skies. The orange hue is a result of the interaction between sunlight and the Earth's atmosphere, influenced by various atmospheric conditions and particles as well as the environment.

Unmodified Canon 1200d

None, other than combining them into a collage.