"No clue, it would take a group of powerful adult wizards to conjure such a storm and for it to find the school is puzzling indeed..." he frowns. Just then Professor Flitwick and Professor Snape make it outside. "Ah this should do..." he smiles a bit "All at once if you please "Dispelus!" he quoted "Everyone wands up and on three."<br/><br/><br/>