Sandra cursed silently. They were going about this all wrong. The storm could hurt the ministry as much as it could help them, and all she need to do was have the Death Eaters prepared.
Snapping her fingertips to her temples, she began sprinting away from the storm. Death Eaters. This is Sandra speaking...thinking. I'm using Legilimens to send you thoughts, but It won't last long...get behind cover.
She ducked behind a nearly shattered desk and readied her wand. The Storm, at it's core, was a seething mass of magical energy combined with the forces of nature. And lie anything, it was only as strong as it's weakest link. But The Ministry had already created it, and it wasn't going to disappear. Instead, she would do something a bit more...dramatic. Taking aim, towards the Storm, she watched it for a few crucial seconds...and let fly.
"EXPULSO!"
True, expulso, at it's heart, was a spell designed to destroy solid matter. But when aimed at air, it made a plenty big magical burst of energy. And with that entire storm building upon that one point, an explosion of magical energy right there would not be pretty.
Sandra ducked her head behind the desk as the Storm erupted into an explosion. Oh, let The Dark Lord help me...