I can't find any articles or anything about her joining TWC, but I just caught a segment with her at the Expert Desk at :20 past this hour, and Twitter indicates that she was on yesterday, as well.
Googling her name turns up a bunch of results about her being a field researcher involved in chasing tornadoes. Does anybody know if this is just a guest appearance on TWC, or has she given up doing field research in favor of having a permanent role at TWC's Expert Desk?