Nether fog is dark after rejoining a world that is thunder storming in the Overworld

What I expected to happen:

When I logged on to a Minecraft world that was thunder storming in the Overworld, I went into the Nether and expected the fog to be the normal color.

What actually happened:

The Nether fog was a lot darker than usual

Steps to Reproduce:

1. Create a new world
2. Set the weather to rain and thunder (/weather thunder)
3. Go into the nether
4. Quit the world and enter it again

The nether fog appears a lot darker. This will stay like this until it stops raining in the overworld and you quit and re-enter the world again.