Scene notes:

What makes these scudding lower clouds so bright? Lights from nearby Walnut Creek impose their light from below on them, incandescent and brightest where the city itself is. The brightened clouds silhouette the trees of the hillside, as airplanes pass overhead rapidly. The sky has stars, and their number pales in comparison to the city lights in the landscape below on the lower-right of the frame. Now clip# NGT087.
Time-lapse length (30 fps):
4 seconds and 23 frames.