As Kat worked on the illusions, she noticed the occasional drifting in the air, the wind tugging on her clothes, but ignored this as she continued to focus. However it only escalated and soon she could no longer maintain the images and reluctantly let them drop; only then really taking into account the situation she was in. The world was white and she was leaving tracks in the snow; obviously the invisibility was being proved useless. Dropping the spell she realised the snow had enveloped her in whiteness, clinging to her clothes, her hair, the only relief provided by the bittersweet wind. She quickly looked down to her hands but relaxed to see that they too were white.

Turning back to the gym she saw the door coated in ice, trying to work out whether that it was better for them to be trapped inside or not given the conditions out here. It wasn't an issue for long though as she heard a blast and realised what was happening. Quickly drawing a shield up around her, kicking up a flurry of more snow, she sheltered from the shards of ice and glass, before looking back to the now hole of an entrance to the gym and the students within. 

There was no purpose in staying in the snow so she quickly disappeared and reappeared again in the comparably warm gym. "I don't think outside is such a good idea any longer." She said, frozen speech bubbles holding her words aloft as she shook her hair, knocking off more of the snow which stubbornly embraced her.