I don't know what to say about that. It's probably just a glitch and it should come back. If not, maybe it didn't get the update, but it's not a huge loss. I'm not the person to ask because I'm a noob, apparently.
I think the 8-city observations are useless on the IS since all the cities are only 30 miles or so less from each other. Like the weather will be drastically different on a regular basis from that distance. In that respect, I just think it's redundant to have that at all when there is the map. I do like seeing the wind speeds, though.