The timestamps themselves need to be explained.

They show a high radar return from 1615 UTC through 1705 UTC, with a peak near 1634 UTC and 1645 UTC.

However - the reported explosions are all near 9 AM Eastern Time, 8 AM Central Time, which is consistent with the scheduled 9:15 Eastern Time touchdown. I also thought the reports from the ground indicated that the explosions and the debris were close together in time. (Corrections to any of these understandings or assumptions are welcome.)

1615 UTC = 11:15 AM Eastern
1634 UTC = 11:34 AM Eastern
1705 UTC = 12:05 PM Eastern

It doesn't seem quite right that major debris would take between 2 and 3 hours to get down to weather radar level from 200,000 ft.