If one was missed, go back outside High Hrothgar and read the words on the floor by the fire pit. This shout is obtained from the Greybeards after having finished the quest ' Alduin's Wall.' The stats for the amount of effect time are:
Using more than just one word causes the weather to remain clear for longer, at a greater recharge time. Using this Shout removes all weather effects (rain, snow, etc.), and is needed to remove the wind barrier between High Hrothgar and the path to the Throat of the World.
