headed

Several reports have mentioned an X Class solar flare headed toward Eastern seaboard. Estimate arrival time at 5 am.

A man on the train points out the cairn on the mountain. We're passing the Arctic Circle, he says. At first we don't see any difference, to the north the land looks the same, but we know where we're headed. I wouldn't have noticed this little event if I hadn't, one of these days, passed seventy.