Watson mentions crosswinds from the Piute Mountains to the San Marcos Mountains. Those are in California not Colorado.
The last shot shows shadows from the topiaries at night while clouds roll across the sky. While a bright moon is capable of producing strong shadows at night, there would be none with a cloudy sky obscuring the moon.
As the Torrances drive on the mountain road, a mechanism carrying the car can be seen outside the driver's side window.