Very good

The Clouds are Black and full of water
The clouds are black from condensation ?
Clouds and black shouldn't be capitalised.

Second stanza IT shouldn't be capitalised that way.

i's need capitals and beginnings of lines need capitals.

"The rain slowly begins to fall on the ground
sounds of the droplets hitting the ground slowly"
Rain slowly begins to fall on the ground,
Sounds of droplets hitting the ground slowly.

Instead of saying the flowers were green, perhaps say that the grass was green. There aren't many green flowers out there, haha.

"why is the thunder so deafening to the ears"
Why is thunder so deafening to the ears?

The times you ask a question it needs a question mark.

This would be a lot better if you had polished it, get rid of the 'the' 's that occur so often, take time to capitalise what needs it and add punctuation to the end of each line.
It helps more than you'd think.
In future it'd be nice to see you take a little more care in how you present your poetry.

Other than that, I like the idea of this though I don't think it is as sad as you intended. I also think that you should move it to the nature category.

The imagery you created was amazing. I could really imagine the storm brewing and then hitting. Great work in that sense.
I'm still going to give this a 5/5, just fixing up those minor errors would make it that much better.

jess ~