The calm before and after

Wrote quickly after the Heavens had opened. A short description of its evolution.

And so it started out so calm,
And calmly turned into a storm,
That very calmly took its toll
And turned into a thunderstorm.

As calmly as it started pouring,
As loudly as it kept on roaring,
Now is but clouds, high up above,
That seem to've showered us enough.