She'd probably said the incantation a dozen times by now and her brain was slowly shutting from the monotony so it was time to get this show on the road before her wand went to sleep as well.

Lex glanced up at the cloud she was meant to be manipulating. One way or another she was going to get it to snow. Most likely there'd only be that one way, sure, but it hardly sounded as determined and try-hard when you only had one road you could take. The Gryffindor reached up and swished her wand around a few times in the cloud to check the density. It was gonna need to get thicker and start sprouting snow, yes?

Alright then. Intent....concentration...had to imagine the composition of the cloud changing into what she wanted it to be. Granted she didn't know what something like that would look like but she'd manage. The important thing was that it changed, yeah? And that when it changed...it wasn't to rain because this cloud was following her. One wrong spell and she'd be soaked. No thanks.

"Stiricidium Nubila!" Nothing. Or no, not nothing because the colour had darkened but in terms of falling, yeah, that was a nothing. Lex squinted up at the cloud, wondering if it might have been a matter of waiting.