I would never bring overnight gear on a day ride.
If there was a chance I would be out at a time when temps would drop, I would bring appropriate clothing for the temp change.
If I got a late start to a massively long day ride(which 140mi is just that), I would make the changes necessary to still get home at my goal time...so it would be a shorter ride.
A battery pack is with me for all long day rides to ensure my cell phone has enough power at all times. That way, I can just call family if needed.