The sound could mean the piece skipped across the ground and slowed its momentum, or it was dislodged from a structure that was relatively close to where they were reporting.
Either way, the sound appeared to alert Cantore before the object sailed his way, which helped his reaction time.
In Cantore’s defense, however, the audio shows the debris made a sound before he spotted it.
That theory may be a bit easier to believe weeks after the viral weatherman lean video, and there have been videos that accused Jim Cantore of playing his reports up in the past.