Why do a tree's leaves turn inside out just before a thunderstorm?

Question

It seems that you can just about always determine if stormy weather is nearby if the leaves of trees are inside-out. Why is that?

Answer 1

Thunderstorm development requires a considerable amount of upflow activity, be it surface heating or whatever. And this upflow lifts the leaves and makes their underside show more clearly. And the result is we get the warning that there is the possibility of storms, or there is at least, a good amount of upflow.

There is also some thought that the downdraft of a thunderstorm can also produce the leaf inversion.

Answer 2

The wind usually picks up before a storm. I notice that also.

Answer 3

becoz its cold