Skyrim itself yields before the Thu’um, as you clear away fog and inclement weather.
Clear Skies is a Dragon Shout that clears weather effects. This shout is learned during The Throat of the World quest. This shout is needed to clear away the weather blocking the path to the Throat of the World. The shout can also be used to clear away fog and mist as well as snowy, cloudy, or rainy weather anywhere in Skyrim. It can also clear poisonous gas away from traps.