Looks like you have them fairly well protected, and with large clusters I would think they will do fine if they are generally healthy. I think in such cold it is important to protect them from wind, as leaks and air movement in the hive would make it much more difficult for the cluster to maintain temperature. I would wrap them good, except the entrance of course, which hopefully is down wind, and remove it after the storm if you are concerned with moisture buildup. But I live in an area of very low humidity (high desert) so never have to worry about (so don't know much about) moisture measurement. The moisture the bees produce evaporates away quickly here.