How to Create a Feeling of Storm in Music?

I'm currently working on transcribing some of my improvisations into music score notation and have just finished the work on the piece I call "A Storm". If you want to learn how I improvised this little piece, here are some of the important steps to try for you as well. It's not a terribly difficult composition with the right hand moving in toccata-like sixteenth note figuration while the left hand has open fifths moving in quarter notes and reinforced by the pedals. If you print it out and play it, please let me know, how it went for you.

PS If you missed my previous little piece "Morning in the Countryside", you can print it out here..