Storm Doodle

Just a quick doodle I did to show my mum the app Paper by 53 works (available for FREE in the Apple App Store). Inspired by today's on and off storms and torrential downpours.
Tools used:
Watercolor brush: blue, green, black, grey
Pencil: blue, white, grey
Fountain pen: white
Sorry for mediocre quality; literally banged this out in 5 minutes.