Hair: MovementBy Rio
Wind Blowing Up
The first example all the way on the left show wind blowing strongly causing the hair to go up pretty much straight. The other example to it's right, though, shows a gently blowing wind. Notice the hair is more wavy and poofy rather than straight and thin.
The way hair is drawn is affected by what the character is wearing. The example all the way on the top right, for instance, has a ponytail. When wind is blowing, the band holds part of his hair down and the rest is being blown. Also, don't forget to draw bangs affected by the wind!
This example on the right basically shows how short hair is affected by wind.
Wind Blowing Around
The first example at top shows hair being constrained from moving too freely with a circlet. On the other hand, the other example on top shows hair moving freely according to the winds direction. Again, remember to draw your bangs moving as well!
For short hair, the example to the right shows strong wind blowing that even the bangs are greatly affected by it! Some people prefer to seperate the bangs and the hair behind it while others blend the two together. How you draw your character's hair depends on you in the end.
Wind Blowing Directionally
If the wind was blowing in the same direction as the character was facing, the hair would be covering the face. The longer-haired guy would also have his hair wrapping around his neck and jaw.
Good Ole Gravity