Strong winds could be disastrous for America's Party because they could have a direct effect on the big fireworks display.
It's hard to imagine New Year's on the Strip without the booms, crackles and bright flashes of fireworks lighting up the night sky.
If the winds are too strong, the show won't go on.
Sustained winds of just ten miles an hour is all it would take to cancel the show because of safety hazards from falling debris.
It's not necessarily an all or nothing proposition.
The wind speed is monitored at each of the Strip hotels and separate decisions can be made.
Show organizers say there's no way to tell what will happen until that midnight moment.