Perhaps the storm had taken a little out of Jack aka Baba Yaga because the crone hadn't felt the latest addition to the City in the form of one mystic and her house. No, in fact, the crone didn't notice the shifts in power until there was one right in the same apartment.
Jack was sleeping at the time he felt it. The day had been spent showing a rather arrogant young couple just what they could do with their little place that hadn't gotten touched by the storm. The pair were out cold on the floor while Jack slept in their bed. The man was just the right size, so Jack was using the young man's clothes.
He sat up the moment he felt the change. It woke him from what some would call a deep sleep, and he walked determinedly out of the bedroom in the stolen pajamas. He really wasn't in the mood for visitors, and he had felt very few in the City who could do that. None had even bothered come this close before; meeting Harry had been an accident. Jack, once things were normal as normal as they get, would have to find these magical types and deal with them. This one just got unlucky in finding Jack/Baba first.