The legend says:

> Yellow Line – ground track uncertainty after predicted reentry time (ticks at 5-minute intervals)

> Blue Line – ground track uncertainty prior to predicted reentry time (ticks at 5-minute intervals)

So the rocket could re-enter anywhere along the yellow or blue lines.

Actually, it can also re-enter outside of the yellow or blue lines. They given an error margin of 24 hours on the predicted reentry time, and the drawn tracks are only 6 hours long.

Looks like it just updated; margin of error was reduced to 22 hours and the drawn tracks now show the full range.

I imagine that as the rocket gets closer to reentering the page will continue to be updated with more precise estimates.

Thanks, I had completely missed that legend. It was folded by default here (?)

That is the orbital prediction at the estimated time of reentry. They take where it is right now projected about 3 days out, and show us 6hrs before and after. LEO takes around 2 hrs or less to circle the earth.

This will change. If there is more drag then expected, or any one hundreds of different things happen, the reentry time will change, and then the predicted area will change.