Check it -
The beautiful blue sky over Glendora, CA. No STORM clouds here.
Oh, here are some clouds...kinda fluffy and not too grey. Will this lead to a STORM? Doubtful.
You want a STORM? Pretty sure this shot proceeded an actual shower! Rage, STORM. rage! :)
I hope it is not STORMing where you are. Unless you're into that! Then STORM away, oh savage skies. Now all that is left to do is wait and see what happens next....