Dark Night

The other day I was watching TV and a storm warning showed up in the bottom corner. I decided to go outside and see what was going on. It was about 9 at night so it was already pretty dark. When I went outside I could clearly see that the sky to the west was drastically darker than the sky on the east. It was very interesting to be able to see the different shades of darkness that the storm was creating in the already dark night sky.