I believe a actually heard this limb fall early Sunday morning, even thought I live several houses further up the street. It made a heck of a racket as it came down. Photos like these provide a good reminder why we all need to watch over our trees and make sure they are maintained properly. Luckily, this limb landed in the street, doing no damage, but it imagine it landing on a car or the roof of a house. Ouch!
In this particular case, the lower part of the branch doesn’t look that rotten, although the upper end of the branch has obviously been dead for a while. We have had bit of rain and a bit of wind in the last several days, so maybe that was enough to finally bring on failure.