"At the moment," Nell explained with a shrug, "it means I attract and repel metal objects and disrupt the electromagnetic fields around most electronics. If I want to, at least." She'd gained that much control, even if she sometimes needed to focus on the small ring she'd made from braided paperclips. "With practice, it means I could potentially manipulate anything that can be affected by magnetic forces." That seemed the safest explanation. Unless she truly got that powerful, there was no need to explain exactly everything that could entail even down to the atomic level.
Her eyes widened at the older woman's admission, though she didn't comment. Weather manipulation like that was going to be a fine balance.