Sandstorms/Dust Storms in Deserts/Mesa respectively; Separate from Rain/Snow Weather

Picture Idea: http://i753.photobucket.com/albums/xx178/afatpuma/desert2.jpg

There are never any visibility issues in a Desert. I always found it odd that there was no weather in the Desert, especially during a Thunderstorm. Let's change that. These Sandstorms would impair your vision, but wouldn't occur that often. This is a real-life phenomenon that only makes sense to be added to the game.

Part of this post: http://www.minecraftforum.net/forums/minecraft-discussion/suggestions/2393851-50-fantastic-features-for-minecraft-1-8