Correct

风势

/ fēng shì / 
Strokes

Example

As a Noun

force of wind

1
Fēngshì
风势
zài
在
jiǎntuì
减退
  
。

The wind is abating/falling.

2
Fēngshì
风势
jiǎnruò
减弱
le
了
  
。

The wind has dropped.

As a Noun

situation; circumstances

3
Kàn
看
fēngshì
风势
xíngshì
行事

find out how the wind blows; take action appropriate to the situation; size up the situation before taking action